Quetiapine monotherapy as treatment for anxiety symptoms in patients with bipolar depression: a pooled analysis of results from 2 double-blind, randomized, placebo-controlled studies.
OBJECTIVE
To evaluate the efficacy and tolerability of quetiapine monotherapy for anxiety symptoms in patients with bipolar disorder experiencing depression in the BipOLar DEpRession (BOLDER I and II) studies.


METHODS
A post hoc analysis of anxiety symptoms in 1,051 acutely depressed patients with bipolar I or II disorder (DSM-IV) from 2 double-blind, randomized, placebo-controlled 8-week studies of quetiapine (300 or 600 mg once daily) was conducted. Anxiety symptoms were assessed using Hamilton Anxiety Rating Scale (HARS) total and psychic (items 1-6, 14) and somatic (items 7-13) anxiety subscale scores (mixed-model repeated measure and last-observation-carried-forward analysis of change from baseline at each assessment). The BOLDER I study was conducted between September 2002 and October 2003, and the BOLDER II study was conducted between June 2004 and August 2005.


RESULTS
Mean baseline HARS total scores were similar across the treatment groups (300 mg/d: 18.9, 600 mg/d and placebo: both 18.6). There was a significantly greater improvement from baseline in mean HARS total scores at the first evaluation (week 1) in both quetiapine groups compared with placebo (300 mg/d: -4.6, P < .001 and 600 mg/d: -4.1, P = .003 vs placebo: -2.8). These improvements were sustained through week 8 with both quetiapine doses (300 mg/d: -10.1, P < .001 and 600 mg/d: -10.5, P < .001 vs placebo: -6.9). At week 8, there was also significant improvement from baseline in HARS psychic and somatic anxiety subscale scores compared with placebo (P < .001). The baseline severity of anxiety did not impact the improvement in depressive symptoms. Common adverse events included dry mouth, sedation, somnolence, and dizziness.


CONCLUSIONS
In this pooled analysis, quetiapine monotherapy was more effective than placebo and generally well tolerated for the treatment of both depressive and anxiety symptoms in patients with bipolar disorder.


BACKGROUND
clinicaltrials.gov Identifiers: NCT00060489 (BOLDER I) and NCT00083954 (BOLDER II).
Lydiard
R Bruce
RB
Southeast Health Consultants and Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, South Carolina, USA.
Culpepper
Larry
L
Schiöler
Helena
H
Gustafsson
Urban
U
Paulsson
Björn
B