Residual Symptom Recovery From Major Affective Episodes in Bipolar Disorders and Rapid Episode Relapse/Recurrence

Department of Psychiatry, University of California-San Diego, 9500 Gilman Dr, La Jolla, CA 92093-0603, USA.
Archives of general psychiatry (Impact Factor: 14.48). 04/2008; 65(4):386-94. DOI: 10.1001/archpsyc.65.4.386
Source: PubMed

ABSTRACT Both bipolar disorder type I and type II are characterized by frequent affective episode relapse and/or recurrence. An increasingly important goal of therapy is reducing chronicity by preventing or delaying additional episodes.
To determine whether the continued presence of subsyndromal residual symptoms during recovery from major affective episodes in bipolar disorder is associated with significantly faster episode recurrence than asymptomatic recovery and whether this is the strongest correlate of early episode recurrence among 13 variables examined.
An ongoing prospective, naturalistic, and systematic 20-year follow-up investigation of mood disorders: the National Institute of Mental Health Collaborative Depression Study.
Five academic tertiary care centers.
Two hundred twenty-three participants with bipolar disorder (type I or II) were followed up prospectively for a median of 17 years (mean, 14.1 [SD, 6.2] years).
Participants defined as recovered by Research Diagnostic Criteria from their index major depressive episode and/or mania were divided into residual vs asymptomatic recovery groups and were compared according to the time to their next major affective episodes.
Participants recovering with residual affective symptoms experienced subsequent major affective episodes more than 3 times faster than asymptomatic recoverers (hazard ratio, 3.36; 95% confidence interval, 2.25-4.98; P < .001). Recovery status was the strongest correlate of time to episode recurrence (P < .001), followed by a history of 3 or more affective episodes before intake (P = .007). No other variable examined was significantly associated with time to recurrence.
In bipolar disorder, residual symptoms after resolution of a major affective episode indicate that the individual is at significant risk for a rapid relapse and/or recurrence, suggesting that the illness is still active. Stable recovery in bipolar disorder is achieved only when asymptomatic status is achieved.

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