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Associations between parity and maternal BMI in a population-based cohort study
Ditte S Iversen1, Ulrik S Kesmodel1,2, Per G Ovesen1
1Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark.
Acta Obstetricia Et Gynecologica Scandinavica
|February 8, 2018
Summary
Overweight and obesity prevalence increased in pregnant Danish women from 2004 to 2012. Each additional birth was associated with a significant increase in body mass index (BMI), highlighting an escalating obstetrical challenge.
Area of Science:
- Reproductive health
- Public health
- Epidemiology
Background:
- Investigated changes in overweight and obesity prevalence among pregnant Danish women between 2004 and 2012.
- Examined the association between increasing parity and body mass index (BMI) prevalence.
Purpose of the Study:
- To determine the trends in prepregnancy overweight and obesity among pregnant women in Denmark over a nine-year period.
- To assess the relationship between the number of previous births (parity) and prepregnancy BMI.
Main Methods:
- Utilized a population-based cohort from the Danish Medical Birth Registry, including 572,321 births from 2004-2012.
- Calculated changes in prepregnancy BMI status and employed multiple linear regression to analyze BMI changes with increasing parity, adjusting for confounders.
Main Results:
- Prevalence of overweight and obesity (BMI ≥ 25) rose from 31.9% in 2004 to 34.2% in 2012.
- Prevalence of obesity alone (BMI ≥ 30) increased from 11% to 12.8% during the same period.
- Mean BMI increased with parity, and each additional birth was associated with an average gain of 0.62 BMI units.
Conclusions:
- Observed a significant increase in overweight and obesity rates among pregnant women in Denmark from 2004-2012.
- Demonstrated a clear positive association between interpregnancy BMI and the number of deliveries.
- Concluded that rising obesity presents a growing concern in obstetrics.
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