BACKGROUND: Preterm birth has been associated with increased risk of venous thromboembolism (VTE) in infancy, but the longer-term risk is unknown. Our aim was to examine this association from birth through young adulthood.METHODS: National cohort study of 3 571 574 individuals who were live-born in Sweden from 1973 through 2008, including 206 844 born preterm (gestational age <37 weeks), and followed up to 2010 (ages 0-38 years).

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