O38 Identifying outcomes for vasa praevia that are important for women: a qualitative study to inform a Core Outcome Set

Background Many studies have demonstrated the key role of ultrasound for the antenatal diagnosis of vasa praevia to prevent perinatal death or severe perinatal morbidity via planned Caesarean birth. However, little is known currently about which outcomes really matter to women. A Core Outcome Set (COS) is the minimum group of outcomes that should be reported in studies on a specific topic so that the results can be compared and combined. …