Objective: The aim of the study was to assess the impact of gestational age (GA) at rupture and latency on perinatal outcome after midtrimester prelabor rupture of membranes (PROM).
Study Design: We obtained data on singleton pregnancies from 22 weeks onwards from the Dutch Perinatal Registry from 1999 to 2007, congenital abnormalities were excluded. In women with PROM before 26 weeks, we studied the impact of GA at rupture and latency on perinatal mortality and morbidity.
Context: Being born very preterm is associated with elevated risk for neonatal mortality. The aim of this review is to give an overview of prediction models for mortality in very premature infants, assess their quality, identify important predictor variables, and provide recommendations for development of future models.
Methods: Studies were included which reported the predictive performance of a model for mortality in a very preterm or very low birth weight population, and classified as development, validation, or impact studies.