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Created on : 02 Aug 2014
Modified on : 02 Aug 2014

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Bibliographical entry (without author) :

Risk of obstetric anal sphincter lacerations among obese women - BJOG: An International Journal of Obstetrics & Gynaecology - Vol. 120, 9 - ISBN: 1471-0528 - p.1110-1115

Author(s) :

Lindholm, Es; Altman, D

Year of publication :

2013

URL(s) :

http://onlinelibrary.wiley.com/doi/10.1111/1471-05…
https://doi.org/10.1111/1471-0528.12228

Résumé (français)  :

Abstract (English)  :

Objective

To assess the risk for obstetric anal sphincter lacerations in relation to maternal obesity among primiparous women in Sweden.


Design

A population-based study.


Setting

Sweden.


Population

All women with vaginal delivery and singleton pregnancy in Sweden in the years 2003–2008 (n = 210 678).


Methods

The Medical Birth Registry, the National Board of Health and Welfare, was used to identify cases of rupture and body mass index (BMI) classes. The population was categorised into four classes with BMI of <25, 25 to <30, 30 to <35 and >35 kg/m2.


Main outcome measures

Odds ratios were estimated with 95% confidence intervals. In order to estimate the effect of BMI on obstetric anal sphincter lacerations, with possible confounders accounted for, uni- and multivariate logistic regressions were performed.


Results

In total, 8958 (4.25%) cases of anal sphincter lacerations (grade III–IV) occurred; increasing BMI showed a significant near-dose–response type of protective effect against grade III–IV lacerations when compared with women with BMI <25 kg/m2: BMI 25 to <30 kg/m2, 0.89; BMI 30 to <35 kg/m2, 0.84; BMI > 35 kg/m2, 0.70.


Conclusion

Overweight and obesity were associated with a decreased risk for obstetric anal sphincter lacerations.

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Import 02/08/2014 — 02 Aug 2014