Résumé :
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[BDSP. Notice produite par INIST-CNRS H8R0x8sq. Diffusion soumise à autorisation]. The aim of this study was to assess the association between maternal employment and preterm delivery. A nationwide case-control study was conducted in 25 Portuguese public maternities. During a 4-month period, 769 consecutive single spontaneous preterm (<37 gestation weeks) live births and 1,053 term singleton babies born immediately after each preterm, were evaluated. Information was obtained by attending physicians using a questionnaire, with special emphasis on maternal work characterization. Logistic regression odds ratios (OR) were adjusted for maternal age, marital status, education and obstetrical characteristics. Women entering pregnancy while unemployed presented a significantly increased risk of spontaneous preterm delivery (OR=1.5 ; 95% confidence interval (CI) 1.18-1.88). Weekly duration of work (<40 versus>=40 h) had no significant effect on the occurrence of spontaneous preterm (OR=1.2 ; 95% CI 0.88-1.54). Unemployed women presented a significant increase in the risk of preterm delivery.
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