Fig. 5From: On the Q statistic with constant weights in meta-analysis of binary outcomesEmpirical level at nominal level of significance .05, vs \(\rho\), for four approximations to the null distribution of \(Q_F\) for log-relative-risk and for the standard chi-square approximation to the null distribution of \(Q_{IV}\), for unequal sample sizes, \(\bar{n} = 60\) and 160. First two rows: \(p_{iC} = .1\); second two rows: \(p_{iC} = .2\)Back to article page