What can we learn from studying control arms of randomised VAW prevention intervention evaluations: reflections on expected measurement error, meaningful change and the utility of RCTs

Background: Randomised controlled trials (RCTs) are a gold standard for evaluations in public health, economics and social sciences, including prevention of violence against women (VAW). They substantially reduce bias, but do not eliminate measurement error. Control arms often show change, but this is rarely systematically examined.Objective: We present a secondary analysis of data from the control arms of evaluations of VAW prevention...