Figure 10From: An accurate test for homogeneity of odds ratios based on Cochran’s Q-statisticAchieved levels for homogeneous studies, N=210. Achieved levels for the three tests Q γ (solid line), BD (dot-dash), and \(Q_{{\chi }^{2}}\) (dash) plotted against the log odds ratio θ. Here all studies have the same parameters: 210 subjects in each study with equal arms of 105 each (N=210 and q=1/2).Back to article page