Methods
In this study, we compare data on pregnancy and neonatal outcomes collected through a full pregnancy history survey questionnaire against prospectively collected data in a sub-area of Sarlahi District, Nepal. This study was conducted at a population-based field site for maternal, newborn, and child health and nutrition research operated by the Nepal Nutrition Intervention Project Sarlahi (NNIPS) since 1989. Specifically, we evaluate the following research aims:Compare numbers of pregnancy and neonatal outcomes and other characteristics reported in the full pregnancy history survey to those recorded in the prospective data.Compare, among pregnancy outcomes matched by delivery date (± 30 days) in the two data sources, measures of agreement and validity for pregnancy and neonatal outcomes, using the prospective data as the reference.