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J Clin Epidemiol. 2003 Nov;56(11):1100-10.

Explaining the association of maternal age with Cesarean delivery for nulliparous and parous women.

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  • 1Center for Statistical Sciences and the Department of Community Health, Brown University School of Medicine, Box G-H, Providence, RI 02912, USA. igareen@stat.brown.edu

Abstract

METHOD:

We used data on 6,805 live births from the National Maternal and Infant Health Survey to examine the positive association between maternal age and Cesarean delivery.

RESULTS:

For parous women, the unadjusted risk ratio [RR] for Cesarean, comparing 35 year olds with 20 year olds, was estimated to be 1.40 [95% confidence limits (CL)=1.18, 1.65]; this association disappeared upon adjustment for obstetrical predictors and other factors (adjusted RR=1.04; 95% CL=0.80, 1.35). In contrast, for nulliparous women, the unadjusted risk ratio was 2.16 (95% CL=1.78, 2.63) and remained substantial upon adjustment (RR=1.74; 95% CL=1.25, 2.43).

CONCLUSION:

These results, along with baseline risk information, suggest that older nulliparous women and their obstetricians should be the target of future efforts to control Cesarean rates.

PMID:
14615001
[PubMed - indexed for MEDLINE]
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