Résumé :
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[BDSP. Notice produite par INIST sLR0xKK6. Diffusion soumise à autorisation]. Context Information about risk of recurrent preterm delivery is useful to clinicians, researchers, and policy makers for counseling, generating etiologic leads, and measuring the related public health burden. Objectives To identify the rate of recurrence of preterm delivery in second pregnancies, factors associated with recurrence, and the percentage of preterm deliveries in women with a history of preterm delivery. Design and Setting Population-based cohort study of data from birth and fetal death certificates from the state of Georgia between 1980 and 1995. Subjects A total of 122 722 white and 56 174 black women with first and second singleton deliveries at 20 to 44 weeks'gestation. Main Outcome Measure Length of gestation (categorized as 20-31,32-36, or >=37 weeks) at second delivery compared with length of gestation at first delivery, by age and race. Results Most women whose first delivery was preterm subsequently had term deliveries. Of 1023 white women whose first delivery occurred at 20 to 31 weeks, 8.2% (95% confidence interval [Cl], 6.6% - 10.1%) delivered their second birth at 20 to 31 weeks and 20.1% (95% Cl, 17.7% - 22.8%) at 32 to 36 weeks. Of 1084 comparable black women, 13.4% (95% CI, 11.4% - 15.6%) delivered at 20 to 31 weeks and 23.4% (95% Cl, 20.9% - 26.1%) delivered at 32 to 36 weeks. (...)
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