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Table 2 Minimum detectable risk differences for outcomes based on baseline prevalence and coefficients of variation

From: A community mobilisation intervention to prevent violence against women and reduce HIV/AIDS risk in Kampala, Uganda (the SASA! Study): study protocol for a cluster randomised controlled trial

Outcome Baseline prevalence Average number of individuals per cluster with outcome data Km Minimum detectable risk difference Minimum detectable reduction in relative risk
Past year physical violence (women) 23% 72 <0.1 9% 39%
Past year sexual violence (women) 12% 72 0.16 7% 58%
Past year concurrent partners (men) 45% 83 0.17 15% 33%