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Objective
To determine whether women with spontaneous preterm birth (PTB) have increased risks for long‐term mortality.
Design
Retrospective cohort.
Setting
Births in Utah between 1939 and 1977.
Population
We included women with a singleton live birth ≥20 weeks who survived at least 1 year following delivery. We excluded those who had never lived in Utah, had improbable birthweight/gestational...