Preterm birth time trends in Europe: a study of 19 countries

To investigate time trends in preterm birth in Europe by multiplicity, gestational age, and onset of delivery.Analysis of aggregate data from routine sources.Nineteen European countries.Live births in 1996, 2000, 2004, and 2008.Annual risk ratios of preterm birth in each country were estimated with year as a continuous variable for all births and by subgroup using log-binomial regression models.Overall preterm birth rate and rate by...