Document Detail

Inherited predisposition to spontaneous preterm delivery.
MedLine Citation:
PMID:  20502281     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To assess inherited predisposition to spontaneous preterm delivery. METHODS: In this retrospective cohort study, intergenerational data on deliveries in mother-daughter pairs were analyzed from the Aberdeen Maternity Neonatal Databank using multilevel logistic regression. The study included an exposed cohort of all women born spontaneously preterm or whose mothers had experienced at least one spontaneous preterm delivery (at 24-37 weeks of gestation). The unexposed cohort included women who were born at term (after 37 weeks of gestation) or those whose mothers had never experienced any spontaneous preterm deliveries (24-37 weeks of gestation). The primary outcome was spontaneous preterm delivery in the daughters' pregnancies. Results are shown as adjusted odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS: We identified 22,343 pregnancies occurring in 13,845 daughters born to 11,576 mothers. Women who were born spontaneously preterm had significantly higher odds of delivering preterm babies (OR 1.49, 95% CI 1.12-1.99). A stronger association was seen when the analysis was restricted to nulliparous women who had been born spontaneously preterm (OR 1.60, 95% CI 1.16-2.21). Other predictors of a woman having a spontaneous preterm delivery were age at delivery younger than 20 years (OR 1.67, 95% CI 1.43-1.94), lower socioeconomic status (OR 1.22, 95% CI 1.04-1.44), smoking more than 10 cigarettes per day (OR 1.47, 95% CI 1.27-1.71), body mass index 19 kg/m or less (OR 1.48, 95% CI 1.24-1.77), previous preterm delivery (OR 2.51, 95% CI 1.71-3.66). The risk of a woman delivering spontaneously preterm was increased even if her mother had a history of spontaneous preterm delivery in any other pregnancy (OR 1.35, 95% CI 1.12-1.63). The absolute risk of spontaneously delivering preterm in women who were born preterm was 9% as opposed to 6.2% in those who were born full-term. This gives an increase in risk of spontaneous preterm birth of 2.8% in women who were born spontaneously preterm. CONCLUSION: Women born spontaneously preterm or with siblings delivered in a similar manner have an increased risk of spontaneous preterm delivery in their own pregnancies. LEVEL OF EVIDENCE: II.
Sohinee Bhattacharya; Edwin Amalraj Raja; Eider Ruiz Mirazo; Doris M Campbell; Amanda J Lee; Jane E Norman; Siladitya Bhattacharya
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Obstetrics and gynecology     Volume:  115     ISSN:  1873-233X     ISO Abbreviation:  Obstet Gynecol     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-26     Completed Date:  2010-07-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401101     Medline TA:  Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1125-33     Citation Subset:  AIM; IM    
Section of Population Health, University of Aberdeen, Dugald Baird Centre for Research on Women's Health, Aberdeen Maternity Hospital, Aberdeen, United Kingdom AB25 2ZL.
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MeSH Terms
Cohort Studies
Genetic Predisposition to Disease*
Gestational Age
Odds Ratio
Premature Birth / genetics*
Retrospective Studies
Young Adult
Comment In:
Obstet Gynecol. 2010 Jun;115(6):1114-5   [PMID:  20502278 ]

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