@article{ref1,
title="An analysis of relapse rates and predictors of relapse in 2 randomized, placebo-controlled trials of desvenlafaxine for major depressive disorder",
journal="Primary care companion to the journal of clinical psychiatry",
year="2015",
author="McIntyre, R.S. and Fayyad, R.S. and Guico-Pabia, C.J. and Boucher, M.",
volume="17",
number="1",
pages="-",
abstract="OBJECTIVE: To evaluate relapse rates and predictors of relapse in 2 randomized, placebo-controlled trials of desvenlafaxine for major depressive disorder (MDD). <br><br>METHOD: Study 1: week 8 responders to open-label desvenlafaxine 50 mg/d entered a 12-week open-label stability phase. Patients with a continuing, stable response at week 20 were randomly assigned to 6-month, double-blind treatment (desvenlafaxine 50 mg/d or placebo). Study 1 was conducted between June 2009 and March 2011 at 87 sites worldwide. Study 2: week 12 responders to open-label desvenlafaxine 200 or 400 mg/d were randomly assigned to 6-month, double-blind treatment (desvenlafaxine 200 mg/d, 400 mg/d, or placebo). Study 2 was conducted between June 2003 and August 2005 at 49 sites in Europe, the United States, and Taiwan. Relapse was assessed separately by study with log-rank test using protocol definitions of relapse and with 17-item Hamilton Depression Rating Scale (HDRS-17) score ≥ 16 at any time during the double-blind phase. Kaplan-Meier estimates evaluated time to relapse, censoring data at months 1, 2, and 3 and overall; treatments were compared using hazard ratios. Cox proportional hazards models assessed relapse predictors. <br><br>RESULTS: Overall relapse rates for all definitions were significantly lower for desvenlafaxine versus placebo for both studies (all P ≤.002). In study 1, rates were significantly lower for desvenlafaxine versus placebo at month 2 (P =.016) and month 3 (P =.007) using the protocol definition. In study 2, relapse rates were significantly lower for desvenlafaxine versus placebo at months 1, 2, and 3 for both definitions (P <.0001-.002). Hazard ratios were similar at months 1, 2, and 3 and overall for both studies (0.382-0.639). <br><br>CONCLUSIONS: Desvenlafaxine 50 to 400 mg/d effectively prevented relapse at 6 months. Desvenlafaxine significantly prevented relapse early (month 1) versus placebo only in study 2. © 2015 Physicians Postgraduate Press, Inc.<p /><p>Language: en</p>",
language="en",
issn="1523-5998",
doi="10.4088/PCC.14m01681",
url="http://dx.doi.org/10.4088/PCC.14m01681"
}