Surveys are the only way to collect data on the prevalence of violence against women (VAW) and thus to get an estimate of the magnitude of the problem in the population. There are two major approaches to collecting population-based data on violence against women using surveys. The first involves “dedicated” surveys that are specifically designed to gather detailed information on different types of violence against women. The second includes a set of questions or a short module on violence against women added to a large-scale survey designed to generate information on broader issues, such as poverty, crime or reproductive health.