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. 2010 Jan 20;2010(1):CD003974. doi: 10.1002/14651858.CD003974.pub3

Comparison 12. Risk of bias subgroup analysis: variance inequality and skewness.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 No signs of unequal variance or skewness 72 4378 Std. Mean Difference (IV, Random, 95% CI) ‐0.24 [‐0.33, ‐0.15]
2 Signs of either unequal variance or skewness 52 4108 Std. Mean Difference (IV, Random, 95% CI) ‐0.20 [‐0.30, ‐0.11]