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BJOG. 2014 Jan;121(1):72-81; discussion 82. doi: 10.1111/1471-0528.12443. Epub 2013 Sep 18.

Association between maternal body mass index during pregnancy, short-term morbidity, and increased health service costs: a population-based study.

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  • 1MRC Centre for Reproductive Health, University of Edinburgh, Queen's Medical Research Institute, Edinburgh, UK.

Abstract

OBJECTIVE:

To investigate the impact of maternal body mass index (BMI, kg/m(2)) on clinical complications, inpatient admissions, and additional short-term costs to the National Health Service (NHS) in Scotland.

DESIGN:

Retrospective cohort study using an unselected population database.

SETTING:

Obstetric units in Scotland, 2003-2010.

POPULATION:

A total of 124,280 singleton deliveries in 109,592 women with a maternal BMI recorded prior to 16 weeks of gestation.

METHODS:

Population-based retrospective cohort study of singleton deliveries, with multivariable analysis used to assess short-term morbidity and health service costs.

MAIN OUTCOME MEASURES:

Maternal and offspring outcomes, number and duration of hospital admissions, and healthcare costs.

RESULTS:

Using multivariable analysis, in comparison with women of normal weight, women who were overweight, obese, or severely obese had an increased risk of essential hypertension [1.87 (1.18-2.96), 11.90 (7.18-19.72), and 36.10 (18.33-71.10)], pregnancy-induced hypertension [1.76 (1.60-1.95), 2.98 (2.65-3.36), and 4.48 (3.57-5.63)], gestational diabetes [3.39 (2.30-4.99), 11.90 (7.54-18.79), and 67.40 (37.84-120.03)], emergency caesarean section [1.94 (1.71-2.21), 3.40 (2.91-3.96), and 14.34 (9.38-21.94)], and elective caesarean section [2.06 (1.84-2.30), 4.61 (4.06-5.24), and 17.92 (13.20-24.34)]. Compared with women of normal weight, women who were underweight, overweight, obese, or severely obese were associated with an 8, 16, 45, and 88% increase in the number of admissions, respectively, and women who were overweight, obese, or severely obese were associated with a 4, 9, and 12% increase in the duration of stay (all P < 0.001). The additional maternity costs [mean (95% CI), adjusted analyses] for women who were underweight, overweight, obese, or severely obese were £102.27 (£48.49-156.06), £59.89 (£41.61-78.17), £202.46 (£178.61-226.31), and £350.75 (£284.82-416.69), respectively.

CONCLUSIONS:

Maternal BMI influences maternal and neonatal morbidity, the number and duration of maternal and neonatal admissions, and health service costs.

© 2013 Royal College of Obstetricians and Gynaecologists.

KEYWORDS:

Economics; healthcare costs; medical complications; obesity; pregnancy

[PubMed - indexed for MEDLINE]
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