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Is obesity still increasing among pregnant women? Prepregnancy obesity trends in 20 states, 2003–2009
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    Prev Med
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    Objective To estimate trends in prepregnancy obesity prevalence among women who delivered live births in the US during 2003–2009, by state, age, and race–ethnicity. Methods We used Pregnancy Risk Assessment Monitoring System (PRAMS) data from 2003, 2006, and 2009 to measure prepregnancy obesity (body mass index [BMI] ≥ 30 kg/m2) trends in 20 states. Trend analysis included 90,774 records from 20 US states with data for all 3 study years. We used a chi-square test for trend to determine the significance of actual and standardized trends, standardized to the age and race–ethnicity distribution of the 2003 sample. Results Prepregnancy obesity prevalence increased by an average of 0.5 percentage points per year, from 17.6% in 2003 to 20.5% in 2009 (P < 0.001). Obesity increased among women aged 20–24 (P < 0.001), 30–34 (P = 0.001) and 35 years or older (P = 0.003), and among non-Hispanic white (P < .001), non-Hispanic black (P = 0.02), Hispanic (P = 0.01), and other women (P = 0.03). Conclusion Overall, prepregnancy obesity prevalence continues to increase and varies by race–ethnicity and maternal age. These findings highlight the need to address obesity as a key component of preconception care, particularly among high-risk groups.
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