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Clinical Trial
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't
Global benefit-risk assessment of antidepressants: venlafaxine XR and fluoxetine.
Journal of Psychiatric Research 2002 May
BACKGROUND: Quantifying efficacy and safety differences between drugs is difficult because rigorous statistical methods to assess benefit and risk simultaneously are lacking.
METHODS: Global benefit-risk (GBR) analysis of clinical trial data was used retrospectively to compare venlafaxine extended release (XR) and fluoxetine. Of 301 outpatients with moderate to severe depression given venlafaxine XR 75-225 mg/day (n=100), fluoxetine 20-60 mg/day (n=103), or placebo (n=98) for up to 8 weeks, 295 qualified for analysis. Primary efficacy variables were Hamilton Rating Scale for Depression (HAM-D) remission (final on-therapy score
RESULTS: Using remission as outcome, the relative gain of venlafaxine XR was 1.78 vs. fluoxetine (P<0.01) and 2.04 vs. placebo (P risk category were 2.1 (1.1-4.0) and 2.2 (1.1-4.3) for venlafaxine XR vs. fluoxetine and placebo, respectively. For CGI response, relative gains of venlafaxine XR were 1.39 (P<0.01) and 1.45 (P<0.01) vs. fluoxetine and placebo; benefit exceeded risk in 66, 53, and 52% of patients given venlafaxine XR, fluoxetine, and placebo (P=0.041 vs. venlafaxine XR), respectively.
CONCLUSIONS: GBR analysis can be applied to a wide array of efficacy and safety data to form statistical tests of clinically meaningful treatment comparisons. In this comparison, the GBR assessments on response and remission significantly favored venlafaxine XR.
METHODS: Global benefit-risk (GBR) analysis of clinical trial data was used retrospectively to compare venlafaxine extended release (XR) and fluoxetine. Of 301 outpatients with moderate to severe depression given venlafaxine XR 75-225 mg/day (n=100), fluoxetine 20-60 mg/day (n=103), or placebo (n=98) for up to 8 weeks, 295 qualified for analysis. Primary efficacy variables were Hamilton Rating Scale for Depression (HAM-D) remission (final on-therapy score
RESULTS: Using remission as outcome, the relative gain of venlafaxine XR was 1.78 vs. fluoxetine (P<0.01) and 2.04 vs. placebo (P risk category were 2.1 (1.1-4.0) and 2.2 (1.1-4.3) for venlafaxine XR vs. fluoxetine and placebo, respectively. For CGI response, relative gains of venlafaxine XR were 1.39 (P<0.01) and 1.45 (P<0.01) vs. fluoxetine and placebo; benefit exceeded risk in 66, 53, and 52% of patients given venlafaxine XR, fluoxetine, and placebo (P=0.041 vs. venlafaxine XR), respectively.
CONCLUSIONS: GBR analysis can be applied to a wide array of efficacy and safety data to form statistical tests of clinically meaningful treatment comparisons. In this comparison, the GBR assessments on response and remission significantly favored venlafaxine XR.
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