Bipolar Disorder Gender Differences -- Neurotransmitter.net

(Updated 1/12/04)

Hendrick V, Altshuler LL, Gitlin MJ, Delrahim S, Hammen C.
Gender and bipolar illness.
J Clin Psychiatry 2000 May;61(5):393-6; quiz 397
"BACKGROUND: For major depression and schizophrenia, gender differences have been reported in symptom expression and course of illness. Gender differences in bipolar disorder are becoming increasingly apparent, but have been less studied. Research data on these differences will help determine whether gender is important in influencing illness variables such as course, symptom expression, and likelihood of comorbidity. METHOD: Charts of 131 patients (63 women and 68 men) with a DSM-IV diagnosis of bipolar disorder admitted to the University of California Los Angeles Mood Disorders Program over a 3-year period were reviewed to gather data on demographic variables and course of illness and to assess differences in the illness across genders. RESULTS: No significant gender differences were found in the rate of bipolar I or bipolar II diagnoses, although women were overrepresented in the latter category. Also, no significant gender differences emerged in age at onset, number of depressive or manic episodes, and number of hospitalizations for depression. Women, however, had been hospitalized significantly more often than men for mania. Further, whereas bipolar men were significantly more likely than bipolar women to have a comorbid substance use disorder, women with bipolar disorder had 4 times the rate of alcohol use disorders and 7 times the rate of other substance use disorders than reported in women from community-derived samples. CONCLUSION: For bipolar disorder, course of illness variables such as age at onset and number of affective episodes of each polarity do not seem to differ across genders. Women, however, may be more likely than men to be hospitalized for manic episodes. While both men and women with the illness have high rates of comorbidity with alcohol and other substance use disorders, women with bipolar disorder are at a particularly high risk for comorbidity with these conditions." [Abstract]

Arnold LM.
Gender differences in bipolar disorder.
Psychiatr Clin North Am. 2003 Sep;26(3):595-620.
"The presentation and course of bipolar disorder differs between women and men. The onset of bipolar disorder tends to occur later in women than men, and women more often have a seasonal pattern of the mood disturbance. Women experience depressive episodes, mixed mania, and rapid cycling more often than men. Bipolar II disorder, which is predominated by depressive episodes, also appears to be more common in women than men. Comorbidity of medical and psychiatric disorders is more common in women than men and adversely affects recovery from bipolar disorder more often in women. Comorbidity, particularly thyroid disease, migraine, obesity, and anxiety disorders occur more frequently in women than men, whereas substance use disorders are more common in men. Although the course and clinical features of bipolar disorder differ between women and men, there is no evidence that gender affects treatment response to mood stabilizers. However, women may be more susceptible to delayed diagnosis and treatment. Treatment of women during pregnancy and lactation is challenging because available mood stabilizers pose potential risks to the developing fetus and infant. Pregnancy neither protects nor exacerbates bipolar disorder, and many women require continuation of medication during the pregnancy. The postpartum period is a time of high risk for onset and recurrence of bipolar disorder in women, and prophylaxis with mood stabilizers might be needed. Individualized risk/benefit assessments of pregnant and postpartum women with bipolar disorder are required to promote the health of the woman and avoid or limit exposure of the fetus or infant to potential adverse effects of medication." [Abstract]

Benazzi F.
Gender differences in bipolar II and unipolar depressed outpatients: a 557-case study.
Ann Clin Psychiatry 1999 Jun;11(2):55-9
"The aim of the present report was to study gender differences in bipolar II and in unipolar depressed outpatients. Consecutive 557 bipolar II and unipolar outpatients presenting for treatment of depression were interviewed with the Structured Clinical Interview for DSM-IV, the Montgomery Asberg Depression Rating Scale, and the Global Assessment of Functioning Scale. Atypical features were significantly more common in bipolar II and in unipolar females than in males, in bipolar II females than in unipolar females, and in bipolar II males than in unipolar males. Female gender was significantly associated with atypical features, but not with diagnosis. Age at intake/onset, duration of illness, severity, recurrences, psychosis, and chronicity were not significantly different in bipolar II and in unipolar females and males (apart from comorbidity). Age at onset was significantly lower in bipolar II females than in unipolar females. This difference was not related to the higher prevalence of atypical features in bipolar II females." [Abstract]

Robb JC, Young LT, Cooke RG, Joffe RT.
Gender differences in patients with bipolar disorder influence outcome in the medical outcomes survey (SF-20) subscale scores.
J Affect Disord 1998 Jun;49(3):189-93
"BACKGROUND: The importance of gender on the course and outcome in bipolar disorder (BD) has been widely acknowledged. The limited data suggest that the prevalence is similar between sexes but that the course of illness may be different. This study investigated gender differences in a clinic sample of patients with BD including a measure of subjects' perception of well-being and functioning. METHODS: Euthymic outpatients attending a mood disorders clinic were systematically assessed. Measurements obtained included SADS-LV, Hamilton Depression Ratings scores, Young Mania Rating scores, and Medical Outcome Survey Short Form 20 items and Global Assessment of Functioning. RESULTS: Women with BD have a later onset of mania, are more likely to have a rapid cycling course, experience mixed episodes, experience more depressive episodes and report more overall impairment in all MOS subscale scores with significant impairment in physical health and pain. CONCLUSIONS: Further investigation and replication of these differences need to be addressed including non-euthymic patients and during a longer period of systematic follow-up." [Abstract]

Cassidy F, Carroll BJ.
The clinical epidemiology of pure and mixed manic episodes.
Bipolar Disord 2001 Feb;3(1):35-40
"INTRODUCTION: Few large clinical epidemiological studies have been undertaken comparing subjects meeting criteria for mixed and pure states of bipolar disorder. In part, the difficulty comparing these states emanates from confusion in their diagnostic separation. In the current report, we use a definition derived from receiver operating characteristic (ROC) curve analysis as an alternative to the DSM-IIIR/IV definition, and we compare the two subtypes of manic episodes. METHODS: Three hundred and sixty-six patients meeting DSM-IIIR criteria for bipolar disorder, manic or mixed, were categorized using newly described criteria for mixed states. The two subtypes were compared on demographic variables and clinical history variables, using multiple analysis of variance with post hoc univariate F tests. The same analyses were conducted using the DSM-IIIR-defined subtypes. RESULTS: Using the ROC criteria, 79 subjects (21.6%) were characterized as mixed, in contrast to 51 subjects (13.9%) using DSM-IIIR criteria for bipolar disorder, mixed. The ROC-defined mixed manic group comprised more Caucasians and more females. Age of first psychiatric hospitalization was earlier and duration of illness longer in the mixed group. First episodes were unlikely to be categorized as mixed (< 5%). When the DSM-IIIR definition was employed, differences were not demonstrated. CONCLUSIONS: An earlier age of first psychiatric hospitalization and increased duration of illness, as well as a lower frequency of mixed subtype of manic episode during first hospitalization, are compatible with the view that mixed manic episodes occur more frequently later in the course of bipolar disorder. Moreover, differences in race, sex, and clinical histories of subjects in mixed episodes tend to support the separation of mixed mania as a diagnostic subtype of bipolar disorder." [Abstract]

Arnold LM, McElroy SL, Keck PE Jr.
The role of gender in mixed mania.
Compr Psychiatry 2000 Mar-Apr;41(2):83-7
"This article reviews the literature regarding possible gender differences in adults with mixed mania. Studies examining gender differences in the prevalence of mixed mania, biological abnormalities, suicidality, long-term outcome, and treatment response were analyzed. Data from these studies suggest that mixed mania may occur more commonly in women than in men, especially when defined by narrow criteria. There were no significant differences between men and women with mixed mania in biological abnormalities, suicidality, outcome, and treatment response." [Abstract]

Maj M, Pirozzi R, Formicola AM, Tortorella A.
Reliability and validity of four alternative definitions of rapid-cycling bipolar disorder.
Am J Psychiatry 1999 Sep;156(9):1421-4
"OBJECTIVE: This study tested the reliability and validity of four definitions of rapid cycling. METHOD: Two trained psychiatrists, using the Schedule for Affective Disorders and Schizophrenia, independently assessed 210 patients with bipolar disorder. They checked whether each patient met four definitions of rapid cycling: one consistent with DSM-IV criteria, one waiving criteria for duration of affective episodes, one waiving such criteria and requiring at least one switch from mania to depression or vice versa during the reference year, and one waiving duration criteria and requiring at least 8 weeks of fully symptomatic affective illness during the reference year. The interrater reliability was calculated by Cohen's kappa statistic. Patients who met each definition according to both psychiatrists were compared to those who did not meet any definition (nonrapid-cycling group) on demographic and clinical variables. All patients were followed up for 1 year. RESULTS: Kappa values were 0.93, 0.73, 0.75, and 0.80, respectively, for the four definitions of rapid cycling. The groups meeting the second and third definitions included significantly more female and bipolar II patients than did the nonrapid-cycling group. Those two groups also had the lowest proportion of patients with a favorable lithium prophylaxis outcome and the highest stability of the rapid-cycling pattern on follow-up. The four groups of rapid-cycling patients did not differ significantly among themselves on any of the assessed variables. CONCLUSIONS: The expression "rapid cycling" encompasses a spectrum of conditions. The DSM-IV definition, although quite reliable, covers only part of this spectrum, and the conditions that are excluded are very typical in terms of key validators and are relatively stable over time." [Abstract]

Rasgon N, Bauer M, Glenn T, Elman S, Whybrow PC.
Menstrual cycle related mood changes in women with bipolar disorder.
Bipolar Disord. 2003 Feb;5(1):48-52.
"OBJECTIVES: A relationship between affective symptoms and menstrual cycle in women with bipolar disorder (BPD) has been suggested. This study investigates the influence of the menstrual cycle on mood in women with BPD who are taking medication, but not selected for menstrual abnormalities. METHODS: Data from women with BPD (n = 17) consecutively enrolled into a ChronoRecord validation study were included in the current analysis. All women received medication for BPD, in addition, 35% received oral contraceptives (OC). Participants entered mood, menstrual data, psychiatric medications, and life events daily for a 3-month period using a computerized version (ChronoRecord) of an established paper based form for self-reporting (ChronoSheet). RESULTS: The majority of women treated for BPD (65%) reported significant mood changes across the menstrual cycle. Long menstrual cycle was present in 59% of subjects, including those taking OC. CONCLUSIONS: Women with BPD taking medication report a high rate of long menstrual cycles, and significant mood changes in relation to menstrual cycle phase." [Abstract]

Chaudron LH, Pies RW.
The relationship between postpartum psychosis and bipolar disorder: a review.
J Clin Psychiatry. 2003 Nov;64(11):1284-92.
"BACKGROUND: The evidence for a spectrum of bipolar disorders is mounting. Of particular interest and importance is the evolution and recurrence of bipolar disorder in the postpartum period and its relationship to postpartum psychosis. Understanding whether such a phenomenological link exists has diagnostic, prognostic, and treatment implications. OBJECTIVES: A comprehensive review of (1) the literature regarding the relationships between postpartum psychosis and bipolar affective disorder, (2) the data regarding prophylactic treatment and acute management of postpartum psychosis and bipolar disorder in the puerperium, and (3) critical areas for future research. STUDY DESIGN: MEDLINE and PubMed (1966-2002) databases were searched for English-language articles using the keywords postpartum/puerperal depression, puerperal/postpartum psychosis, bipolar disorder, lithium, anticonvulsants, antipsychotics, and breastfeeding. RESULTS: Evidence from studies of women with a history of bipolar disorder, longitudinal studies of women with puerperal episodes of psychosis, and family studies support a link between postpartum psychosis and bipolar disorder. CONCLUSIONS: Understanding the relationship between postpartum psychosis and bipolar disorder has implications for perinatal and long-term treatment. Prophylactic treatment of women with bipolar disorder and/or a history of postpartum psychosis may be indicated. Epidemiological, genetic, and pharmacologic research must be completed to understand, prevent, and adequately treat postpartum psychosis." [Abstract]

Jones I, Craddock N.
Do puerperal psychotic episodes identify a more familial subtype of bipolar disorder? Results of a family history study.
Psychiatr Genet. 2002 Sep;12(3):177-80.
"Bipolar women have a marked vulnerability to puerperal psychosis, an episode of mania or psychosis following childbirth. We have conducted a family history study to examine the question of whether a vulnerability to puerperal episodes of illness is a marker for a more familial form of bipolar disorder. A consecutive series of 103 bipolar disorder probands were recruited in a lithium clinic and given a semi-structured interview, including a detailed family history. For the 52 female probands, information was also obtained about the relationship of episodes to childbirth. The morbid risk of affective disorder in first-degree relatives of bipolar women who had suffered an episode of mania, hypomania or schizoaffective mania with onset within 6 weeks of childbirth was significantly higher than that in relatives of parous bipolar women with no episodes in relation to childbirth (P = 0.0077). Despite relatively small numbers, this study provides evidence to support the hypothesis that puerperal episodes identify a more familial subtype of bipolar disorder." [Abstract]

Frye MA, Altshuler LL, McElroy SL, Suppes T, Keck PE, Denicoff K, Nolen WA, Kupka R, Leverich GS, Pollio C, Grunze H, Walden J, Post RM.
Gender differences in prevalence, risk, and clinical correlates of alcoholism comorbidity in bipolar disorder.
Am J Psychiatry. 2003 May;160(5):883-9.
"OBJECTIVE: The prevalence of lifetime alcohol abuse and/or dependence (alcoholism) in patients with bipolar disorder has been reported to be higher than in all other axis I psychiatric diagnoses. This study examined gender-specific relationships between alcoholism and bipolar illness, which have previously received little systematic study. METHOD: The prevalence of lifetime alcoholism in 267 outpatients enrolled in the Stanley Foundation Bipolar Network was evaluated by using the Structured Clinical Interview for DSM-IV. Alcoholism and its relationship to retrospectively assessed measures of the course of bipolar illness were evaluated by patient-rated and clinician-administered questionnaires. RESULTS: As in the general population, more men (49%, 57 of 116) than women with bipolar disorder (29%, 44 of 151) met the criteria for lifetime alcoholism. However, the risk of having alcoholism was greater for women with bipolar disorder (odds ratio=7.35) than for men with bipolar disorder (odds ratio=2.77), compared with the general population. Alcoholism was associated with a history of polysubstance use in women with bipolar disorder and with a family history of alcoholism in men with bipolar disorder. CONCLUSIONS: This study suggests that there are gender differences in the prevalence, risk, and clinical correlates of alcoholism in bipolar illness. Although this study is limited by the retrospective assessment of illness variables, the magnitude of these gender-specific differences is substantial and warrants further prospective study." [Abstract]

Christensen EM, Gjerris A, Larsen JK, Bendtsen BB, Larsen BH, Rolff H, Ring G, Schaumburg E.
Life events and onset of a new phase in bipolar affective disorder.
Bipolar Disord. 2003 Oct;5(5):356-61.
"BACKGROUND: There is an increasing focus on the impact of psychosocial factors and stressors on the course of bipolar affective disorder. The life event research has revealed many biases and the results are conflicting. In a prospective study we examined the relationship between life events and affective phases in a group of bipolar patients with a long duration of the disease. METHODS: A group of patients with at least three admissions to hospital for bipolar disorder was followed every 3 months for up to 3 years. At each examination an evaluation of affective phase was made according to the Hamilton Depression Scale, the Newcastle Depression Rating Scale and the Bech-Rafaelsen Mania Rating Scale. Moreover, the patients were rated according to the Paykel Life Events Scale. Their current medical treatment was noted. RESULTS: Fifty-six patients (19 men and 37 women) were included in the study. Women experienced a significantly higher number of life events than men. In 21% of the 353 examinations of women, a new phase was preceded by life events whereas this was the case only in 8% of the 152 examinations of men. In 13% of the male examinations the patients were in a manic phase and in 5% in a depressive phase. In 5% of the female examinations the patients were in a manic phase and in 15% in a depressive phase. Half of the women's depressive phases were preceded by life events, but none of the depressive phases of men. The categories of life events preceding the depressive phases presented a significant overweight of somatic ill health and conflicts in the family. CONCLUSION: We found a gender difference in the course of bipolar affective disorder, as women had a significantly higher number of depressive episodes than men and men had a higher number of manic episodes than women. In bipolar patients with long duration of disease a significant number of depressive episodes in women were preceded by negative life events. Somatic health problems and conflicts in the family were significant factors preceding new depressive phases." [Abstract]

Calabrese JR, Shelton MD, Rapport DJ, Kujawa M, Kimmel SE, Caban S.
Current research on rapid cycling bipolar disorder and its treatment.
J Affect Disord 2001 Dec;67(1-3):241-55
"Rapid cycling is a pattern of presentation of bipolar disorder that specifies the course of the illness and is associated with a greater morbidity. The validity of rapid cycling as a distinct course modifier for bipolar disorder has been demonstrated and the term has been incorporated into the DSM-IV. The phenomenon of rapid cycling tends to appear late in the course of the disorder, occurs more frequently among females, and is more frequently seen in patients with bipolar type II disorder." [Abstract]
Raymont V, Bettany D, Frangou S.
The Maudsley bipolar disorder project. Clinical characteristics of bipolar disorder I in a Catchment area treatment sample.
Eur Psychiatry. 2003 Feb;18(1):13-7.
"The clinical characteristics of bipolar I disorder (BD1) have prognostic and therapeutic importance. The aim of this study was to examine the effect of demographic and clinical variables on the course of BD1. We reviewed the case notes of all BD1 patients (n = 63) receiving treatment in a London psychiatric service during a 1-month period. Depressive and manic onsets were equally likely without any gender difference. The earlier the age of onset, the more likely it was for patients to experience psychotic features. Only depressive onsets predicted a higher number of episodes of the same polarity. Male gender and substance abuse were associated with younger age at first presentation, while women with co-morbid substance abuse had more manic episodes. Male patients were more likely than females to be unemployed or single." [Abstract]
Akiskal HS, Hantouche EG, Bourgeois ML, Azorin JM, Sechter D, Allilaire JF, Lancrenon S, Fraud JP, Chatenet-Duchene L.
Gender, temperament, and the clinical picture in dysphoric mixed mania: findings from a French national study (EPIMAN).
J Affect Disord 1998 Sep;50(2-3):175-86
"BACKGROUND: This research derives from the French national multisite collaborative study on the clinical epidemiology of mania (EPIMAN). Our aim is to establish the validity of dysphoric mania along a "spectrum of mixity" extending into mixed mania with subthreshold depressive manifestations; to demonstrate the feasibility of obtaining clinically meaningful data on this entity on a national level; and to characterize the contribution of temperamental attributes and gender in its origin. METHODS: EPIMAN involves training 23 French psychiatrists in four different sites, representing four regions of France; to rigorously apply a common protocol deriving from the criteria of DSM-IV and McElroy et al.; the use of such instruments as the Beigel-Murphy, Ahearn-Carroll, modified HAM-D; and measures of affective temperaments based on the Akiskal-Mallya criteria; obtaining data on comorbidity, and family history (according to Winokur's approach as incorporated into the FH-RDC); and prospective follow-up for at least 12 months. The present report concerns the clinical and temperamental features of 104 manic patients during the acute hospital phase. RESULTS: Dysphoric mania (DM defined conservatively with fullblown depressive admixtures of five or more symptoms) occurred in 6.7%; the rate of dysphoric mania defined broadly (DM, presence of > or = 2 depressive symptoms) was 37%. Depressed mood and suicidal thoughts had the best positive predictive values for mixed mania. In comparison to pure mania (0-1 depressive symptoms), DM was characterized by female over-representation; lower frequency of such typical manic symptomatology as elation, grandiosity, and excessive involvement; higher prevalence of associated psychotic features; higher rate of mixed states in first episodes; and complex temperamental dysregulation along primarily depressive, but also cyclothymic, and irritable dimensions; such irritability was particularly apparent in mixed mania at the lowest threshold of depressive admixtures of two symptoms only. LIMITATION: In a study involving hospitalized affectively unstable psychotic patients, it was difficult to assure that psychiatrists making the clinical diagnoses would be blind to the temperamental measures. However, bias was minimized by the systematic and/or semi-structured nature of all evaluations. CONCLUSIONS: Mixed mania, defined cross-sectionally by the simultaneous presence of at least two depressive symptoms, represents a prevalent and clinically distinct form of mania. Subthreshold depressive admixtures with mania actually appear to represent the more common expression of dysphoric mania. Moreover, an irritable dimension appears to be relevant to the definition of the expression of mixed mania with the lowest threshold of depressive symptoms. Neither an extreme, nor an endstage of mania, "mixity" is best conceptualized as intrusion of mania into its "opposite" temperament - especially that defined by lifelong depressive traits - and favored by female gender. These data suggest that reversal from a temperament to an episode of "opposite" polarity represents a fundamental aspect of the dysregulation that characterizes bipolar disorder. In both men and women with hyperthymic temperament, there appears "protection" against depressive symptom formation during a manic episode which, accordingly, remains relatively "pure". Because men have higher rates of this temperament, pure mania is overrepresented in men; on the other hand, the depressive temperament in manic women seems to be a clinical marker for the well-known female tendency for depression, hence the higher prevalence of mixed mania in women." [Abstract]
Visscher PM, Yazdi MH, Jackson AD, Schalling M, Lindblad K, Yuan QP, Porteous D, Muir WJ, Blackwood DH.
Genetic survival analysis of age-at-onset of bipolar disorder: evidence for anticipation or cohort effect in families.
Psychiatr Genet 2001 Sep;11(3):129-37
"Age-at-onset (AAO) in a number of extended families ascertained for bipolar disorder was analysed using survival analysis techniques, fitting proportional hazards models to estimate the fixed effects of sex, year of birth, and generation, and a random polygenic genetic effect. Data comprised the AAO (for 171 affecteds) or age when last seen (ALS) for 327 unaffecteds, on 498 individuals in 27 families. ALS was treated as the censored time in the statistical analyses. The majority of individuals classified as affected were diagnosed with bipolar I and II (n = 103) or recurrent major depressive disorder (n = 68). In addition to the significant effects of sex and year of birth, a fitted 'generation' effect was highly significant, which could be interpreted as evidence for an anticipation effect. The risk of developing bipolar or unipolar disorder increased twofold with each generation descended from the oldest founder. However, although information from both affected and unaffected individuals was used to estimate the relative risk of subsequent generations, it is possible that the results are biased because of the 'Penrose effect'. Females had a twofold increased risk in developing depressive disorder relative to males. The risk of developing bipolar or unipolar disorder increased by approximately 4% per year of birth. A polygenic component of variance was estimated, resulting in a 'heritability' of AAO of approximately 0.52. In a family showing strong evidence of linkage to chromosome 4p (family 22), the 'affected haplotype' increased the relative risk of being affected by a factor of 46. In this family, there was strong evidence of a time trend in the AAO. When either year of birth or generation was fitted in the model, these effects were highly significant, but neither was significant in the presence of the other. For this family, there was no increase in trinucleotide repeats measured by the repeat expansion detection method in affected individuals compared with control subjects. Proportional hazard models appear appropriate to analyse AAO data, and the methodology will be extended to map quantitative trait loci (QTL) for AAO." [Abstract]
Leboyer M, Bellivier F, McKeon P, Albus M, Borrman M, Perez-Diaz F, Mynett-Johnson L, Feingold J, Maier W.
Age at onset and gender resemblance in bipolar siblings.
Psychiatry Res 1998 Nov 16;81(2):125-31
"In order to measure the intrafamilial correlation for age at onset and to examine gender resemblance among bipolar siblings, we assessed a sample of 130 bipolar patients belonging to 59 multiple affected sibships. To study the intrafamilial resemblance for age at onset and gender, we used the intraclass correlation and the sibship method, respectively. Within the whole sample, age at onset for affected siblings was correlated (rho = 0.42, P = 0.0001). Gender was randomly distributed among bipolar sibships, demonstrating the absence of gender resemblance among affected siblings. The existence of an intrafamilial correlation for age at onset among bipolar siblings suggests that this variable may assist in the identification of more heritable forms of the illness. No intrafamilial correlation was found for the gender of affected siblings, suggesting that familial vulnerability factors are not gender-specific." [Abstract]

Lish JD, Gyulai L, Resnick SM, Kirtland A, Amsterdam JD, Whybrow PC, Price RA.
A family history study of rapid-cycling bipolar disorder.
Psychiatry Res 1993 Jul;48(1):37-46
"Previous studies have yielded mixed evidence as to whether rapid-cycling bipolar disorder (four or more episodes per year) is associated with a distinctive pattern of patient characteristics and familial aggregation of affective disorder. In this study, Family History Research Diagnostic Criteria (FH-RDC) were used to interview 165 patients with rapid-cycling bipolar disorder, non-rapid-cycling bipolar disorder, or recurrent unipolar depressive disorder about the psychiatric history of 812 adult first-degree relatives. In a validity study, FH-RDC diagnoses were demonstrated to agree reasonably well with best-estimate diagnoses by two psychiatrists/psychologists, based on direct interviews with the Structured Clinical Interview for DSM-III-R. Relatives of patients with recurrent unipolar depression were less likely to have bipolar disorder and more likely to have unipolar depression than were relatives of rapid-cycling or non-rapid-cycling bipolar patients. Rapid-cycling patients were younger and more likely to be female than non-rapid-cycling patients. The relatives of rapid cyclers did not differ significantly from those of non-rapid cyclers in the prevalence of bipolar disorder, unipolar disorder, rapid-cycling bipolar disorder, or substance abuse. However, there were nonsignificant trends for the relatives of rapid-cycling bipolar patients, compared with those of non-rapid-cycling bipolar patients, to have more substance abuse and less bipolar disorder given the presence of affective disorder." [Abstract]

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Recent Bipolar Disorder & Gender Research
1) Teh CF, Kilbourne AM, McCarthy JF, Welsh D, Blow FC
Gender differences in health-related quality of life for veterans with serious mental illness.
Psychiatr Serv. 2008 Jun;59(6):663-9.
OBJECTIVE: This study assessed gender differences in health-related quality of life (HRQOL) in a national sample of veterans with serious mental illness. METHODS: Data were analyzed from the Large Health Survey of Veterans, which was mailed to a national random sample of veterans in 1999. The linear and logistic multiple regression analyses included 18,017 veterans with schizophrenia, schizoaffective disorder, or bipolar disorder who completed the survey. HRQOL was measured by using the various subscales of the 36-Item Short Form of the Medical Outcomes Study (MOS SF-36) (mental component summary, physical component summary, and activities of daily living) and by questions assessing self-perceptions of health status. RESULTS: The sample was 7.3% female, 75.7% white, and 83.8% unemployed. Mean+/-SD age was 54.3+/-12.2 years. After the analysis adjusted for sociodemographic characteristics, health status, and other variables, compared with male veterans, female veterans with serious mental illness had lower scores on the SF-36 physical component summary (indicating worse symptoms), were more likely to report that they were limited "a lot" in activities of daily living, and had more pain. However, female respondents were more likely to have a positive outlook on their health. CONCLUSIONS: Among veterans who received a diagnosis of serious mental illness from providers of the Department of Veterans Affairs, women reported substantially poorer HRQOL than men across several domains but women reported better self-perceived health. Attention to the particular needs of female veterans with serious mental illness is imperative as the numbers of female veterans continue to increase. [PubMed Citation] [Order full text from Infotrieve]

2) Barry D, Pietrzak RH, Petry NM
Gender differences in associations between body mass index and DSM-IV mood and anxiety disorders: results from the National Epidemiologic Survey on Alcohol and Related Conditions.
Ann Epidemiol. 2008 Jun;18(6):458-66.
PURPOSE: The purpose of this study is to examine gender differences in associations between body mass index (BMI) and affective disorders. METHODS: We used logistic regression to examine the effects of BMI and gender on Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) mood and anxiety disorders in a sample of 40,790 adults. RESULTS: Obesity (BMI >30.0) was associated with increased risk for any mood disorder, major depressive disorder, and dysthymic disorder, in both men and women (odds ratios [ORs], 1.35-1.88). Risk of bipolar I and II disorders was elevated in obese women (ORs, 1.70-2.41) but not men. Overweight (BMI = 25.0-29.9) predicted increased risk for any mood disorder and bipolar I disorder in women but not in men (ORs, 1.16-1.44). Obesity was associated with increased odds of any anxiety disorder and specific phobia in men and women (ORs, 1.35-1.79). Obese women were additionally at increased risk for social phobia. Overweight predicted increased risk of social phobia and specific phobia for women but not for men (ORs, 1.27-1.37). CONCLUSIONS: Obese individuals of both genders are at increased risk for a range of mood and anxiety disorders, but women who are even moderately overweight experience increased risks for some disorders as well. [PubMed Citation] [Order full text from Infotrieve]

3) Shivakumar G, Bernstein IH, Suppes T, Keck PE, McElroy SL, Altshuler LL, Frye MA, Nolen WA, Kupka RW, Grunze H, Leverich GS, Mintz J, Post RM
Are bipolar mood symptoms affected by the phase of the menstrual cycle?
J Womens Health (Larchmt). 2008 Apr;17(3):473-8.
BACKGROUND: Evidence suggests gender differences may exist in bipolar disorder, and a review of the literature shows that more women than men may experience rapid-cycling bipolar disorder. The issues contributing to these gender differences are unknown; a number of case reports have indicated the possibility of mood changes secondary to hormonal influences during the menstrual cycle. We sought to examine the relationship between bipolar disorder and menstrual cycle-related mood changes. To our knowledge, this is one of the largest samples in the literature addressing this issue. METHODS: Outpatient women with bipolar disorder I, bipolar disorder II, and not otherwise specified (NOS), between the ages of 18 and 45, were evaluated. The National Institute of Mental Health Life Chart Method-p (NIMH-LCM-p) was used for daily mood ratings of depression and mania. Repeated measures of ANOVA and t tests were conducted separately for depressive and for manic symptom scores. RESULTS: One hundred nineteen women met the age criterion, and only 41 women met the rest of the inclusion criteria. In this sample of 41 women, there was no significant relationship between phases of the menstrual cycle (early and late follicular and early and late luteal phases) and changes in depression or mania. In an exploratory examination, 8 of 41 women showed a numerically higher mean depression score in the luteal phase than in the follicular phase; 5 of 41 women showed a numerically higher mean mania score in the luteal phase than in the follicular phase of the menstrual cycle. CONCLUSIONS: Different phases of the menstrual cycle were unrelated to depression and mania in a heterogeneous group of women with bipolar disorder. Prospective studies are needed to identify a vulnerable subpopulation in a homogeneous clinical sample. [PubMed Citation] [Order full text from Infotrieve]

4) Laursen TM, Munk-Olsen T, Nordentoft M, Bo Mortensen P
A comparison of selected risk factors for unipolar depressive disorder, bipolar affective disorder, schizoaffective disorder, and schizophrenia from a danish population-based cohort.
J Clin Psychiatry. 2007 Nov;68(11):1673-81.
OBJECTIVE: Growing evidence of an etiologic overlap between schizophrenia and bipolar disorder has become increasingly difficult to disregard. In this study, we examined paternal age, urbanicity of place of birth, being born "small for gestational age," and parental loss as risk factors for primarily schizophrenia and bipolar disorder, but also unipolar depressive disorder and schizo-affective disorder. Furthermore, we examined the incidence of the disorders in a population-based cohort and evaluated our results in the context of the Kraepelinian dichotomization. METHOD: We established a register-based cohort study of more than 2 million persons born in Denmark between January 1, 1955, and July 1, 1987. Overall follow-up began on January 1, 1973 and ended on June 30, 2005. Relative risks for schizophrenia, bipolar disorder, unipolar depressive disorder, and schizoaffective disorder (ICD-8 or ICD-10) were estimated by survival analysis, using Poisson regression. RESULTS: Differences were found in age-specific incidences. Loss of a parent (especially by suicide) was a risk factor for all 4 disorders. High paternal age and urbanization at birth were risk factors for schizophrenia. Children born pre-term had an excess risk of all disorders except schizophrenia if they were born "small for gestational age." CONCLUSIONS: An overlap in the risk factors examined in this study was found, and the differences between the phenotypes were quantitative rather than qualitative, which suggests a genetic and environmental overlap between the disorders. However, large gender differences and differences in the age-specific incidences in the 4 disorders were present, favoring the Kraepelinian dichotomization. [PubMed Citation] [Order full text from Infotrieve]

5) Maxwell JC, Freeman J
Gender differences in DUI offenders in treatment in Texas.
Traffic Inj Prev. 2007 Dec;8(4):353-60.
OBJECTIVE: This is a study of 8,464 adult women and 21,155 adult males who entered substance abuse treatment in Texas between 2000 and 2005. Participants were either on probation for driving under the influence (DUI), were referred to treatment by DUI probation, or had been arrested for DUI in the past year. METHODS: The female and male clients were compared on demographic characteristics, substance use patterns, DSM-IV diagnoses, and levels of impairment. T tests and chi square tests were used to determine significance and multivariate logistic regression identified predictors of completing treatment and being abstinent at follow-up. RESULTS: The proportion of females who were sent to treatment as a result of DUI increased from 27% in 2000 to 32% in 2005. Females were significantly more likely than males to be White (73% vs. 56%), to have used substances a shorter period of time (17 vs. 19 years), to be seeking custody to regain their children (11% vs. 2%), to meet the DSM criteria for drug dependence (32% vs. 23%), to have injected drugs (31% vs. 23%), to have used substances daily (42% vs. 40%), to have a depressive disorder (16% vs. 7%) or bipolar disorder (12% vs. 5%), and to be have been in treatment before (60% vs. 49%). In contrast, males were more likely to be alcohol dependent (49% vs. 44%). Females were less likely to complete treatment (67% vs. 72%) and reported significantly more days of problems on the 6 domains of the ASI at both admission and at 60-day follow-up. Furthermore, at follow-up, they were more likely to be living with someone who abused alcohol or used drugs (9% vs.7%). CONCLUSIONS: Although females comprised only 29% of the DUI treatment admissions, they were more impaired and experienced more problems than their male counterparts. The findings indicate that additional resources, including treatment for co-occurring mental health problems and living in sober households, may be keys to helping these women achieve abstinence and prevent additional DUI episodes. [PubMed Citation] [Order full text from Infotrieve]

6) Vaskinn A, Sundet K, Friis S, Simonsen C, Birkenaes AB, Engh JA, J�nsd�ttir H, Ringen PA, Opjordsmoen S, Andreassen OA
The effect of gender on emotion perception in schizophrenia and bipolar disorder.
Acta Psychiatr Scand. 2007 Oct;116(4):263-70.
OBJECTIVE: Impaired emotion perception is documented for schizophrenia, but findings have been mixed for bipolar disorder. In healthy samples females perform better than males. This study compared emotion perception in schizophrenia and bipolar disorder and investigated the effects of gender. METHOD: Visual (facial pictures) and auditory (sentences) emotional stimuli were presented for identification and discrimination in groups of participants with schizophrenia, bipolar disorder and healthy controls. RESULTS: Visual emotion perception was unimpaired in both clinical groups, but the schizophrenia sample showed reduced auditory emotion perception. Healthy males and male schizophrenia subjects performed worse than their female counterparts, whereas there were no gender differences within the bipolar group. CONCLUSION: A disease-specific auditory emotion processing deficit was confirmed in schizophrenia, especially for males. Participants with bipolar disorder performed unimpaired. [PubMed Citation] [Order full text from Infotrieve]

7) McDermott BE, Quanbeck CD, Frye MA
Comorbid substance use disorder in women with bipolar disorder associated with criminal arrest.
Bipolar Disord. 2007 Aug;9(5):536-40.
OBJECTIVES: Previous research has indicated that comorbid substance abuse in patients with bipolar disorder (BPD) is strongly linked to criminal arrest. This study was conducted to further evaluate possible gender differences in substance use and risk of criminality in BPD. METHODS: Subjects were selected from all inmates with a DSM-IV diagnosis of BPD type I at Los Angeles County correctional facility. As a comparison, a sample of Los Angeles County patients with BPD type I who had not been arrested during the course of their psychiatric treatment within LA County was identified. The county's Management Information System (MIS) was utilized to obtain primary and secondary diagnoses as well as demographic information. RESULTS: The odds of having a comorbid substance use diagnosis for arrested female patients was more than 38 times that for community female patients (odds ratio = 38.75). Women were more likely to have been arrested for violent and substance use charges; men were more likely to have been arrested for theft and miscellaneous charges. CONCLUSIONS: Substance abuse appears to be a significant risk factor for arrest in patients with BPD and is especially significant for women with BPD. Our study suggests that comorbid BPD and substance use in women may significantly increase the risk of criminal arrest. [PubMed Citation] [Order full text from Infotrieve]

8) Young RC, Kiosses D, Heo M, Schulberg HC, Murphy C, Klimstra S, Deasis JM, Alexopoulos GS
Age and ratings of manic psychopathology.
Bipolar Disord. 2007 May;9(3):301-4.
OBJECTIVES: Clinicians have suggested that manic psychopathology in adulthood changes with advanced age. We used rating scale evaluations of manic psychopathology in adult patients with bipolar (BP) disorder to test whether older age is associated with scores on items related to excesses of behaviors: i.e., Sexual Interest, Increased Activity-Energy, Speech--Rate and Amount, and Disruptive-Aggressive Behavior. METHODS: The association of Young Mania Rating Scale item scores with current age was studied in symptomatic inpatients meeting DSM-IV criteria for BP disorder, manic. RESULTS: The sample consisted of 149 patients ranging in age from 18 to 89 years; 48 of these were male. Age was not associated with differences in overall severity reflected in total score. Age was associated with lower scores on the Sexual Interest item (r = - 0.26, p < 0.001). A trend for higher scores with age on Speech--Rate and Amount (r = 0.19, p < 0.02) did not meet criteria for significance. Increased Activity-Energy, Disruptive-Aggressive Behavior and other item scores were not associated with age. In an exploratory analysis, age and Sexual Interest and Speech item scores were associated in female patients but not in male patients. CONCLUSIONS: These findings suggest that age minimally influences manic psychopathology in patients with BP disorder. The modest correlation between age and Sexual Interest item scores warrants further investigation and the trend for an association between age and Speech--Rate and Amount can be examined in future studies. Possible gender differences in the associations between age and these item scores also invite future study. [PubMed Citation] [Order full text from Infotrieve]

9) Najt P, Nicoletti M, Chen HH, Hatch JP, Caetano SC, Sassi RB, Axelson D, Brambilla P, Keshavan MS, Ryan ND, Birmaher B, Soares JC
Anatomical measurements of the orbitofrontal cortex in child and adolescent patients with bipolar disorder.
Neurosci Lett. 2007 Feb 21;413(3):183-6.
Imaging studies indicate smaller orbitofrontal cortex (OFC) volume in mood disorder patients compared with healthy subjects. We sought to determine whether child and adolescent patients with bipolar disorder have smaller OFC volumes than healthy controls. Fourteen children and adolescents meeting DSM-IV criteria for bipolar disorder (six males and eight females with a mean age+/-S.D.=15.5+/-3.2 years) and 20 healthy controls (11 males and nine females with mean age+/-S.D.=16.9+/-3.8 years) were studied. Orbitofrontal cortex volume was measured using magnetic resonance imaging. Male bipolar patients had smaller gray matter volumes in medial (p=0.044), right medial (0.037) and right (p=0.032) lateral OFC subdivisions compared to male controls. In contrast, female patients had larger gray matter volumes in left (p=0.03), lateral (p=0.012), left lateral (p=0.007), and trends for larger volumes in right lateral and left medial OFC subdivisions compared with female controls. Male patients exhibit smaller gray matter volumes, while female patients exhibit larger volumes in some OFC sub-regions. Gender differences in OFC abnormalities may be involved in illness pathophysiology among young bipolar patients. [PubMed Citation] [Order full text from Infotrieve]

10) De Luis DA, Aller R, Izaola O
Resting energy expenditure and insulin resitance in obese patients, differences in women and men.
Eur Rev Med Pharmacol Sci. 2006 Nov-Dec;10(6):285-9.
BACKGROUND AND OBJECTIVE: There is little research about the relation of REE and insulin resistance with gender. The aim of our work was to study gender differences in REE and insulin resistance in obese patients. RESEARCH METHODS AND PROCEDURES: A population of 131 obesity patients was analyzed in a prospective way. The following variables were specifically recorded: age, smoking habit, drinking habit, weight, body mass index (BMI), waist circumference, and waist-hip ratio. Blood pressure, basal glucose, insulin, fibrinogen, and C-reactive protein. HOMA was calculated. An indirect calorimetry, tetrapolar electrical bioimpedance and a serial assessment of nutritional intake with 3 days written food records were performed. RESULTS: The mean age was 31.7 +/- 9.2 years and the mean BMI 34.4 +/- 5.3. Cardiovascular risk factors were similar in both groups. Anthropometric measurements showed an average waist circunference (107.8 +/- 16.1 cm), waist-to hip ratio (0.93 +/- 0.11), and average weight (94.8 +/- 20.2 kg). Bipolar body electrical bioimpedance showed the next data; fat free mass (55.2 +/- 17.1 kg) and fat mass (35.7 +/- 12.3 kg). Indirect calorimetry showed higher resting metabolic rate (REE) in males (2001.7 +/- 443 Kcal/day vs. 1774.7 +/- 344 Kcal/day; p < 0.05). REE corrected by fat free mass was similar (male 34.2 +/- 17 Kcal/day/kg vs female 39 +/- 11.6 Kcal/day/kg; ns). Nutritional intake and HOMA were similar in males and females. In the multivariate analysis with a dependent variable (RMR), the fat free mass remained in the male model (F = 18.5; p < 0.05), with an increase of 17.8 (CI 95%: 9.1-26.2) kcal/day with each 1 kg of fat free mass adjusted by age. In the female model, the fat free mass remained in the model (F = 1 2.5; p < 0.05), with an increase of 15.2 (CI 95%: 6.3-24.2) kcal/day with each 1 kg of fat free mass adjusted by age. CONCLUSION: REE was higher in males than females, with a higher influence of fat free mass in males than females. No association between insulin resistance and REE was detected. [PubMed Citation] [Order full text from Infotrieve]

11) Benedetti A, Fagiolini A, Casamassima F, Mian MS, Adamovit A, Musetti L, Lattanzi L, Cassano GB
Gender differences in bipolar disorder type 1: a 48-week prospective follow-up of 72 patients treated in an Italian tertiary care center.
J Nerv Ment Dis. 2007 Jan;195(1):93-6.
To explore gender differences in bipolar I disorder, we compared the longitudinal treatment outcome and baseline demographic and clinical characteristics of 27 male and 45 female adult subjects who were treated for an acute affective episode and longitudinally followed for a period of up to 48 weeks. Females were more likely to report a history of suicidal gestures and a comorbid panic disorder; males were more likely to present with a comorbid obsessive-compulsive disorder, and there was a trend for a more frequent history of alcohol or substance abuse. No significant differences were found between the genders for the time to remission from the index episode, number of recurrences, and time spent with any clinical or subclinical mood symptom during the 48 weeks of maintenance treatment. Although differences may exist between bipolar I male and female subjects, prospective course does not seem to reveal differences in a 48-week period, at least when similar treatment strategies are adopted. [PubMed Citation] [Order full text from Infotrieve]

12) Aloysi A, Van Dyk K, Sano M
Women's cognitive and affective health and neuropsychiatry.
Mt Sinai J Med. 2006 Nov;73(7):967-75.
Recent interest in women's health has focused on the cognitive consequences of aging and hormonal changes. Based on hypotheses about estrogenic effects in the central nervous system (CNS), large-scale clinical trials were designed to address the efficacy of hormone replacement on protection against dementia and cognitive decline. Surprisingly, an absence of risk reduction for dementia and cognitive loss was found and much reanalysis of these findings has focused on timing of hormone replacement. Here we take a broad perspective to address a fuller range of psychological health. Gender differences in other psychiatric conditions including depression and anxiety have been attributed to hormones, and the neurotransmitter systems that are implicated in affective disorders may have an impact on cognitive impairment as well. Hormonal influences on neurotrophic mechanisms, as well as neurotransmitter effects, may be responsible for a breadth of neuropsychiatric conditions, particularly in aging. This review will focus on cognition, mood and anxiety issues among women with an emphasis on changes associated with aging. We will review data on the epidemiology of these entities and examine the biological mechanisms, which may be involved, with an emphasis on those mechanisms that may contribute to the multiple aspects of neuropsychiatry and women's health. [Free Full Text] [PubMed Citation] [Order full text from Infotrieve]

13) Sherazi R, McKeon P, McDonough M, Daly I, Kennedy N
What's new? The clinical epidemiology of bipolar I disorder.
Harv Rev Psychiatry. 2006 Nov-Dec;14(6):273-84.
The last few decades have seen a rapid change in our understanding of the epidemiology of bipolar disorder, which has only recently started to achieve major research attention. This article reviews recent developments. In addition to electronic searches using MEDLINE and PsycLIT, references from articles were identified, major journals hand searched, and major textbooks of psychiatry and epidemiology reviewed. Studies may have overestimated the prevalence of mania, and underestimated incidence. The incidence of mania may be increasing in recent generations, but the data remain inconclusive. Age at onset of mania is earlier than previously believed, and there are gender differences in epidemiology and clinical course. Ethnic differences in epidemiology and clinical course of bipolar disorder are highlighted. Comorbid alcohol and substance abuse are common in patients suffering from bipolar disorder and are associated with a more severe clinical course and a worse outcome. Urban living and lower socioeconomic and single marital status may be risk factors for developing bipolar disorder. [PubMed Citation] [Order full text from Infotrieve]

14) Subramaniam H, Dennis MS, Byrne EJ
The role of vascular risk factors in late onset bipolar disorder.
Int J Geriatr Psychiatry. 2007 Aug;22(8):733-7.
BACKGROUND: The association between late life depression and cerebro-vascular risk and cerebro-vascular disease is well established. Do similar links exist with late onset bipolar disorder? AIMS AND OBJECTIVES: Patients with early onset (less than 60 years of age) bipolar disorder were compared with those of late onset (aged 60 and above) in relation to cognitive function, physical health and vascular risk factors. METHOD: Cross-sectional survey of elderly bipolar disorder patients (above 65 years) involved with secondary care mental health services. Thirty patients with early onset were compared with 20 patients with a late onset bipolar disorder. Diagnosis of bipolar disorder was according to ICD-10 criteria and without an associated clinical diagnosis of dementia. Assessment of cognition included tests of frontal-executive function, and cerebro-vascular risk was quantified with the Framingham stroke risk score. RESULTS: The late onset group had a higher stroke risk score than the early onset group, this difference persisting despite taking age and gender differences into account. However, late onset patients' cognitive function (including frontal lobe tests) and physical health status was no different to the early onset group. CONCLUSION: There is higher 'cerebrovascular risk' in elderly patients with late onset bipolar disorder, compared to patients with an early onset. This suggests that cerebrovascular risk may be an important factor for the expression of bipolar disorders in later life, and has significant management implications for older bipolar patients. [PubMed Citation] [Order full text from Infotrieve]

15) Alloy LB, Abramson LY, Walshaw PD, Keyser J, Gerstein RK
A cognitive vulnerability-stress perspective on bipolar spectrum disorders in a normative adolescent brain, cognitive, and emotional development context.
Dev Psychopathol. 2006;18(4):1055-103.
Why is adolescence an "age of risk" for onset of bipolar spectrum disorders? We discuss three clinical phenomena of bipolar disorder associated with adolescence (adolescent age of onset, gender differences, and specific symptom presentation) that provide the point of departure for this article. We present the cognitive vulnerability-transactional stress model of unipolar depression, evidence for this model, and its extension to bipolar spectrum disorders. Next, we review evidence that life events, cognitive vulnerability, the cognitive vulnerability-stress combination, and certain developmental experiences (poor parenting and maltreatment) featured in the cognitive vulnerability-stress model play a role in the onset and course of bipolar disorders. We then discuss how an application of the cognitive vulnerability-stress model can explain the adolescent age of onset, gender differences, and adolescent phenomenology of bipolar disorder. Finally, we further elaborate the cognitive vulnerability-stress model by embedding it in the contexts of normative adolescent cognitive (executive functioning) and brain development, normative adolescent development of the stress-emotion system, and genetic vulnerability. We suggest that increased brain maturation and accompanying increases in executive functioning along with augmented neural and behavioral stress-sensitivity during adolescence combine with the cognitive vulnerability-stress model to explain the high-risk period for onset of bipolar disorder, gender differences, and unique features of symptom presentation during adolescence. [PubMed Citation] [Order full text from Infotrieve]

16) Baldassano CF
Illness course, comorbidity, gender, and suicidality in patients with bipolar disorder.
J Clin Psychiatry. 2006;67 Suppl 11:8-11.
Among patients with bipolar disorder, comorbid conditions are common. Comorbidity is associated with a more difficult course of illness (such as longer episodes, shorter time euthymic, and earlier age at onset) and an increase in related problems (such as suicidality and violence). Data from the Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD) reveal that anxiety disorders, attention-deficit/hyperactivity disorder, and substance and alcohol use disorder are conditions that commonly co-occur with bipolar disorder. This article details these findings and discusses the complications associated with these comorbid conditions. STEP-BD data about gender differences are also discussed, and correlates of suicidal ideation among patients entering the program are described. [PubMed Citation] [Order full text from Infotrieve]

17) Currier D, Mann MJ, Oquendo MA, Galfalvy H, Mann JJ
Sex differences in the familial transmission of mood disorders.
J Affect Disord. 2006 Oct;95(1-3):51-60.
BACKGROUND: Mood disorders exhibit familial transmission due to both environmental and genetic risk factors. Mood disorders are more common in women, yet the role of gender in the familial transmission of mood disorders is unclear. This study examines rates of mood disorder transmission to offspring based on the sex of affected parent, sex of offspring and role of clinical factors, such as childhood abuse history, comorbid psychiatric disorders, and traits of aggression and impulsivity. METHODS: Risk of transmission of mood disorder to offspring from females and males was compared in a sample of 272 probands with a major mood disorder using generalized estimating equations (GEE). Demographic and clinical characteristics of all male and female probands were compared. Characteristics that differed in probands were entered into the model to obtain an unbiased test of gender differences in transmission rate. Multivariate GEE models, one for male probands and one for female probands, were used to test for risk factors in transmission of mood disorder. RESULTS: Familial transmission rate of mood disorders from female probands was almost double that of males. There was no difference in transmission to male or female offspring. For male probands, offspring mood disorder was independently associated with earlier age of proband mood disorder onset, greater number of proband years ill, and proband history of childhood abuse. For female probands, offspring mood disorder was associated with higher aggression scores in probands. LIMITATIONS: We did not directly interview offspring and also had limited data on psychopathology in co-parents. This is a cross-sectional study and cannot account for emergence of illness in offspring in the future. CONCLUSIONS: The two-fold higher rate of maternal transmission of mood disorder may reflect differences in regulation of maternal and paternal transmission of mood disorder. Future studies need to determine the relative contribution of genetic and non-genetic factors and identify the factors responsible for higher rates of transmission of mood disorders by females with a mood disorder. [PubMed Citation] [Order full text from Infotrieve]

18) Althoff RR, Rettew DC, Faraone SV, Boomsma DI, Hudziak JJ
Latent class analysis shows strong heritability of the child behavior checklist-juvenile bipolar phenotype.
Biol Psychiatry. 2006 Nov 1;60(9):903-11.
BACKGROUND: The Child Behavior Checklist (CBCL) has been used to provide a quantitative description of childhood bipolar disorder (BPAD). Many have reported that children in the clinical range on the Attention Problems (AP), Aggressive Behavior (AGG), and Anxious-Depressed (A/D) syndromes simultaneously are more likely to meet the criteria for childhood BPAD. The purpose of this study was to determine if Latent Class Analysis (LCA) could identify heritable phenotypes representing the CBCL-Juvenile Bipolar (CBCL-JBD) profile and whether this phenotype demonstrates increased frequency of suicidal endorsement. METHODS: The CBCL data were received by survey of mothers of twins in two large twin samples, the Netherlands Twin Registry. The setting for the study was the general community twin sample. Participants included 6246 10-year-old Dutch twins from the Netherlands Twin Registry. The main outcome measure consisted of the LCA on the items comprising the AP, AGG, and A/D subscales and means from the suicidal items #18 and #91 within classes. RESULTS: A 7 class model fit best for girls and an 8 class fit best for boys. The most common class for boys or girls was one with no symptoms. The CBCL-JBD phenotype was the least common--about 4%-5% of the boys and girls. This class was the only one that had significant elevations on the suicidal items of the CBCL. Gender differences were present across latent classes with girls showing no aggression without the CBCL-JBD phenotype and rarely showing attention problems in isolation. Evidence of high heritability of these latent classes was found with odds ratios. CONCLUSIONS: In a general population sample, LCA identifies a CBCL-JBD phenotype latent class that is associated with high rates of suicidality, is highly heritable, and speaks to the comorbidity between attention problems, aggressive behavior, and anxious/depression in children. [PubMed Citation] [Order full text from Infotrieve]

19) Kessing LV
Gender differences in subtypes of late-onset depression and mania.
Int Psychogeriatr. 2006 Dec;18(4):727-38.
BACKGROUND: It is currently not known whether elderly men and women present with different subtypes of depression and mania/bipolar disorder. The aim of this study was to compare the prevalence of subtypes of a single depressive episode and mania/bipolar disorder according to the ICD-10 for elderly men and women in a nationwide sample of all out- and inpatients in psychiatric settings. METHODS: All patients older than 65 years who received a diagnosis of a single depressive episode and mania/bipolar disorder in the period from 1994 to 2002 at the end of their first outpatient treatment or at their first discharge from psychiatric hospitalization in Denmark were identified in a nationwide register. RESULTS: A total of 9837 patients aged more than 65 years received a diagnosis of a single depressive episode (69.9% were women) and 443 a diagnosis of mania/bipolar disorder (61.6% were women) at the end of their first contact with psychiatric health care. Slightly more women than men received a diagnosis of mild (70.8%) or moderate depression (67.4%) compared to severe depression (65.9%). Men more often presented with a single depressive episode with comorbid substance abuse or comorbid somatic illness. No gender differences were found in the prevalence of depression with or without melancholic or psychotic symptoms. Men more often presented with mania/bipolar disorder with comorbid substance abuse. CONCLUSIONS: The distributions of the subtypes of a single depressive episode or mania/bipolar disorder are remarkably similar for male and female patients aged over 65 years with first contact with the psychiatric health-care system. [PubMed Citation] [Order full text from Infotrieve]

20) Baldassano CF, Marangell LB, Gyulai L, Nassir Ghaemi S, Joffe H, Kim DR, Sagduyu K, Truman CJ, Wisniewski SR, Sachs GS, Cohen LS
Gender differences in bipolar disorder: retrospective data from the first 500 STEP-BD participants.
Bipolar Disord. 2005 Oct;7(5):465-70.
OBJECTIVE: To examine gender differences in a large sample of patients with bipolar illness. METHODS: Exploratory analysis of baseline data from the first 500 patients in the Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD), a multi-center NIMH project. Participants are allowed to have medical and psychiatric comorbidities, and to enter in any mood state, thus making the population more generalizable than many research cohorts. Diagnoses and history were assessed using structured clinical instruments administered by certified investigators. Given the exploratory nature of these analyses, there is no correction of for multiple comparisons. However, we emphasize findings that are statistically significant at the more stringent p < 0.01 level. RESULTS: Compared with men, women had higher rates of BPII (15.3% M versus 29.0% F, p < 0.01), comorbid thyroid disease (5.7% M versus 26.9% F, p < 0.01), bulimia (1.5% M versus 11.6% F, p < .0.01) and post-traumatic stress disorder (10.6% M versus 20.9% F, p < 0.01). Women and men had equal rates of history of lifetime rapid cycling and depressive episodes. Men were more likely to have a history of legal problems (36% M versus 17.5% F, p < 0.01). CONCLUSIONS: Potentially important gender differences in certain illness characteristics were found in our study; however, in contrast to other reports, we did not find higher rates of lifetime depressive episodes or rapid cycling in women. Although our study is limited by its retrospective study design, its results are strengthened by our large sample size and use of structured interviews. [PubMed Citation] [Order full text from Infotrieve]