Figure 12From: An accurate test for homogeneity of odds ratios based on Cochran’s Q-statisticAchieved levels for homogeneous studies, N=90, q=2/3. 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: 90 subjects in each study with unequal arms with 30 in the treatment arm (N=90 and q=2/3).Back to article page