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. 2017 Oct 6;7(10):e016894. doi: 10.1136/bmjopen-2017-016894

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Meta-analysis of risk differences for the dichotomous outcomes (random effects (RE) model). Heterogeneity measures: informed choice: I²=74.7%, Q test p=0.047; knowledge: I²=0%, Q test p=0.75; positive attitudes: I²=84.6%, Q test p=0.011; undecided: I²=96.9%, Q test p<0.001; intention to be screened: I²=75.9%, Q test p=0.008.