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Fig. 1 | BMC Medicine

Fig. 1

From: The normality assumption on between-study random effects was questionable in a considerable number of Cochrane meta-analyses

Fig. 1

Proportions of meta-analyses with significant non-normality in different subgroups for A meta-analyses with binary outcomes and B those with non-binary outcomes. On the horizontal axis, the first line presents restrictions on study sample sizes, and the second line of panel A presents restrictions on event rates. The corresponding numbers of meta-analyses satisfying the restrictions are in parentheses. The vertical bars represent 95% confidence intervals of the proportions

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