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Risk of early birth by body mass index in a propensity score‐matched sample: A retrospective cohort study.
- Source :
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BJOG: An International Journal of Obstetrics & Gynaecology . Sep2022, Vol. 129 Issue 10, p1704-1711. 8p. - Publication Year :
- 2022
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Abstract
- Objective Evaluate the risk of preterm (<37 weeks) or early term birth (37 or 38 weeks) by body mass index (BMI) in a propensity score‐matched sample. Design Retrospective cohort analysis. Setting: California, USA. Population Singleton live births from 2011–2017. Methods: Propensity scores were calculated for BMI groups using maternal factors. A referent sample of women with a BMI between 18.5 and <25.0 kg/m2 was selected using exact propensity score matching. Risk ratios for preterm and early term birth were calculated. Main outcome measures: Early birth. Results: Women with a BMI <18.5 kg/m2 were at elevated risk of birth of 28–31 weeks (relative risk [RR] 1.2, 95% CI 1.1–1.4), 32–36 weeks (RR 1.3, 95% CI 1.2–1.3), and 37 or 38 weeks (RR 1.1, 95% CI 1.1–1.1). Women with BMI ≥25.0 kg/m2 were at 1.2–1.4‐times higher risk of a birth <28 weeks and were at reduced risk of a birth between 32 and 36 weeks (RR 0.8–0.9) and birth during the 37th or 38th week (RR 0.9). Conclusion: Women with a BMI <18.5 kg/m2 were at elevated risk of a preterm or early term birth. Women with BMI ≥25.0 kg/m2 were at elevated risk of a birth <28 weeks. Propensity score‐matched women with BMI ≥30.0 kg/m2 were at decreased risk of a spontaneous preterm birth with intact membranes between 32 and 36 weeks, supporting the complexity of BMI as a risk factor for preterm birth. Propensity score‐matched women with BMI ≥30 kg/m2 were at decreased risk of a late spontaneous preterm birth. Propensity score‐matched women with BMI ≥30 kg/m2 were at decreased risk of a late spontaneous preterm birth. [ABSTRACT FROM AUTHOR]
- Subjects :
- *BODY mass index
*PREMATURE labor
*PROPENSITY score matching
*COHORT analysis
Subjects
Details
- Language :
- English
- ISSN :
- 14700328
- Volume :
- 129
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- BJOG: An International Journal of Obstetrics & Gynaecology
- Publication Type :
- Academic Journal
- Accession number :
- 158449033
- Full Text :
- https://doi.org/10.1111/1471-0528.17120