@article{ref1,
title="Clinical correlates of first-episode polarity in bipolar disorder",
journal="Comprehensive psychiatry",
year="2006",
author="Daban, Claire and Colom, Francesc and Sánchez-Moreno, Jose and Garcia-Amador, Margarita and Vieta, Eduard",
volume="47",
number="6",
pages="433-437",
abstract="OBJECTIVE: To determine the clinical and long-term implications of mood polarity at illness onset. METHODS: During a 10-year follow-up prospective study, systematic clinical and outcome data were collected from 300 bipolar I and II patients. The sample was split into 2 groups according to the polarity of the onset episode (depressive onset [DO] vs manic/hypomanic onset [MO]). Clinical features and social functioning were compared between the 2 groups of patients. RESULTS: In our sample, 67% of the patients experienced a depressive onset. Depressive onset patients were more chronic than MO patients, with a higher number of total episodes and a longer duration of illness. Depressive onset patients experienced a higher number of depressive episodes than MO patients, who in turn had more manic episodes. Depressive onset patients made more suicide attempts, had a later illness onset, were less often hospitalized, and were less likely to develop psychotic symptoms. Depressive onset was more prevalent among bipolar II patients. Bipolar I patients with DO had more axis II comorbidity and were more susceptible to have a history of psychotic symptoms than bipolar II patients with DO. CONCLUSION: The polarity at onset is a good predictor of the polarity of subsequent episodes over time. A depressive onset is twice as frequent as MO and carries more chronicity and cyclicity.<p /><p>Language: en</p>",
language="en",
issn="0010-440X",
doi="10.1016/j.comppsych.2006.03.009",
url="http://dx.doi.org/10.1016/j.comppsych.2006.03.009"
}