![]() ![]() Survey data were linked to surveillance data in two sites, and to ultrasound pregnancy dating at <24 weeks in one site. We included questions regarding GA in months (GAm) for all women and GA in weeks (GAw) for a subset we also asked if the baby was ‘born before expected’ to estimate preterm birth rates. The EN-INDEPTH population-based survey of 69,176 women was undertaken (2017-2018) in five Health and Demographic Surveillance System sites in Bangladesh, Ethiopia, Ghana, Guinea-Bissau and Uganda. ![]() We examined the performance of new questions to measure GA in household surveys, a subset of which had linked early pregnancy ultrasound GA data. ![]() However, GA is rarely assessed in population-based surveys, the major data source in low/middle-income countries. Preterm birth (gestational age (GA) <37 weeks) is the leading cause of child mortality worldwide. ![]()
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