… Infants born very preterm (<32 weeks … Health Organization defines preterm birth before 37
weeks gestation with subcategories including very preterm birth, and extreme preterm birth (<…

… implications for public-sector services, such as health insurance, educational, and other
social support systems. The annual societal economic burden associated with preterm birth in …

… Leisure time physical activity has been associated with a reduced risk of preterm birth, but
the implications for causality are unclear. Employment alone is nonspecific as a factor related …

… %–30% preterm births are medically indicated to avoid or minimize maternal and/or fetal
complications, most preterm births result from spontaneous preterm labor or preterm premature …

… Conclusions and Relevance We identified 12 preterm birth phenotypes associated with
different patterns of neonatal outcomes. In 22% of all preterm births, parturition started …

… Preterm birth remains a major contributor to infant mortality … a preterm birth are at risk for
maternal mental health issues, … comorbid, following preterm birth and relationships between …

… intervention that prevents preterm birth and associated perinatal … of approximately 30,000
preterm births before 34 weeks of … preterm birth, with the goal of preventing preterm birth and …

… Then we explore the implications of these patterns for confounding by sociodemographic …
-varying exposures and preterm birth. Although we focus on preterm birth, the potential for …

… Deficiencies in preterm immune function have implications for the eradication of postnatal
infections. Particularly important are nosocomial infections, which occur more frequently in …

… In the interests of public health planning, we also estimate preterm birth by three
subgroups—namely, extremely preterm, very preterm, and moderate or late preterm (figure 1). …