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Multidisciplinary Approach to Obesity Management: A Case Report
Published on: May 30, 2025
Trends in pre-pregnancy obesity in nine states, 1993-2003
Shin Y Kim1, Patricia M Dietz, Lucinda England
1National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Division of Reproductive Health, 4770 Buford Highway NE, MS K-23, Atlanta, GA 30341, USA. skim1@cdc.gov
Insights
Pre-pregnancy obesity significantly increased by 69.3% between 1993 and 2003 among women delivering live infants. This trend highlights critical risks for maternal and infant health.
Area of Science:
- Public Health
- Reproductive Health
- Epidemiology
Background:
- Pre-pregnancy obesity presents significant health risks to both pregnant individuals and their offspring.
- Monitoring trends in pre-pregnancy obesity is crucial for public health interventions.
Purpose of the Study:
- To examine trends in pre-pregnancy obesity prevalence from 1993 to 2003.
- To analyze obesity trends across various maternal demographic and behavioral subgroups.
Main Methods:
- Utilized data from the Pregnancy Risk Assessment Monitoring System (PRAMS) in nine states.
- Calculated pre-pregnancy Body Mass Index (BMI) from self-reported data and linked birth certificates.
- Analyzed a weighted sample of 66,221 births, representative of 18.5% of US births.
Main Results:
- Pre-pregnancy obesity prevalence rose by 69.3% from 13.0% (1993-1994) to 22.0% (2002-2003).
- State-level increases ranged from 45% to 105%.
- All examined subgroups showed at least a 43% increase, with highest prevalence in younger, Black, multiparous, less educated, WIC-enrolled, and non-smoking women.
Conclusions:
- A significant increasing trend in pre-pregnancy obesity was observed in the studied population.
- This escalating prevalence has substantial implications for reproductive health care and outcomes.
Objective:
Pre-pregnancy obesity poses risks to both pregnant women and their infants. This study used a large population-based data source to examine trends, from 1993 through 2003, in the prevalence of pre-pregnancy obesity among women who delivered live infants.
Research Methods And Procedures:
Data from the Pregnancy Risk Assessment Monitoring System in nine states were analyzed for trends in pre-pregnancy obesity (BMI>29.0 kg/m2) overall and by maternal demographic and behavioral characteristics. Pre-pregnancy BMI was calculated from self-reported weight and height on questionnaires administered after delivery, and demographic characteristics were taken from linked birth certificates. The sample of 66,221 births was weighted to adjust for survey design, non-coverage, and non-response, and it is representative of all women delivering a live birth in each particular state. The sampled births represented 18.5% of all births in the United States.
Results:
Pre-pregnancy obesity increased 69.3% during the study period, from 13.0% in 1993 to 1994 to 22.0% in 2002 to 2003. The percentage increase ranged from 45% to 105% for individual states. Subgroups of women with the highest prevalence of obesity in 2002 to 2003 were those who were 20 to 29 years of age, black, had three or more children, had a high school education, enrolled in Women, Infants, and Children, or were non-smokers. However, all subgroups of women examined experienced at least a 43% increase in pre-pregnancy obesity over this time period.
Discussion:
The prevalence of pre-pregnancy obesity is increasing among women in these nine states, and this trend has important implications for all stages of reproductive health care.
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