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Gender differences in a cohort study of 604 bipolar patients: the role of predominant polarity

Nivoli, Alessandra M. A. and Pacchiarotti, Isabella and Ribeiro Rosa, Adriane and Popovic, Dina and Murru, Andrea and Valentí Ribas, Marc and Bonnin, Caroline Mar and Grande, Iria and Sánchez Moreno, José and Vieta, Eduard and Colom, Francesc (2011) Gender differences in a cohort study of 604 bipolar patients: the role of predominant polarity. Journal of Affective Disorders, Vol. 133 (3), p. 443-449. ISSN 0165-0327. eISSN 1573-2517. Article.

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DOI: 10.1016/j.jad.2011.04.055


Some clinical differences between gender regarding the course and outcome of bipolar disorders have already been described and some others remain still controversial.
Aims To explore gender differences regarding clinical and socio-demographic characteristics amongst bipolar patients with particular attention to predominant polarity and depressive symptoms.
Method Data were collected from DSM-IV type I and II bipolar patients (n = 604), resulting from the systematic follow-up of the Bipolar Disorders Program, Hospital Clinic of Barcelona, over an average follow-up of 10 years. Socio-demographic and clinical variables were collected in order to detect gender-related differences.
Results Bipolar women are more likely than men to show a predominance of depressive polarity as well as a depressive onset whilst men would be more likely to suffer from comorbid substance use disorders. Women significantly have a higher lifetime prevalence of psychotic depression and a higher prevalence of axis II comorbid disorders. Bipolar women are also more likely to have a family history of suicide and a lifetime history of attempted suicide. Suicide attempts are more often violent amongst bipolar men. In a backward logistic regression model, two variables were responsible for most gender-related clinical differences: type of predominant polarity – more likely to be depressive amongst women – (B = − 0.794, p = 0.027, Exp(B) = 0.452; CI = 0.223–0.915), alcohol abuse (B = − 1.095, p = 0.000, Exp(B) = 2990; CI = 1.817–4.919) and cocaine abuse (B = 0.784, p = 0.033, Exp(B) = 2.189; CI = 1.066–4.496) – more prevalent amongst men.
Conclusion The main characteristic featuring bipolar women is depression, both at illness onset and as a predominant polarity all along the illness course. This may have important diagnostic and therapeutic implications.

Item Type:Article
ID Code:6236
Uncontrolled Keywords:Bipolar disorder, depression, gender, course, outcome
Subjects:Area 06 - Scienze mediche > MED/25 Psichiatria
Divisions:001 Università di Sassari > 01 Dipartimenti > Neuroscienze, scienze materno infantili
Copyright Holders:© 2011 Elsevier B.V.
Deposited On:08 Jul 2011 13:20

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