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. Author manuscript; available in PMC: 2014 Sep 22.
Published in final edited form as: Cochrane Database Syst Rev. 2011 Mar 16;(3):CD007938. doi: 10.1002/14651858.CD007938.pub2

Comparison 2.

Withdrawals - placebo-controlled studies

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 Adverse event withdrawal 17 3022 Risk Ratio (M-H, Fixed, 95% CI) 1.36 [1.09, 1.71]
2 All-cause withdrawal 17 3063 Risk Ratio (M-H, Fixed, 95% CI) 1.05 [0.91, 1.21]