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Table 3 Maternal characteristics by Body Mass Index

From: Pre-pregnancy obesity and non-adherence to multivitamin use: findings from the National Pregnancy Risk Assessment Monitoring System (2009–2011)

  Underweight n = 219 560 Normal Weight n = 2 534 187 Overweight n = 1 212 554 Obese n = 1 066 261 P-value
Weighted row %
Socio-demographic
Age      <.0001
   ≤ 19 17.4 10.9 7.4 5.8  
  20–24 30.9 22.2 23.1 22.7  
  25–29 26.7 28.5 29.8 31.0  
  30–35 16.8 25.0 24.7 25.4  
   > 35 8.3 13.4 15.0 15.1  
Race/Ethnicity      <.0001
  White, non-Hispanic 60.4 63.7 56.0 56.2  
  Black, non-Hispanic 11.7 10.8 15.6 18.7  
  Hispanic 14.8 16.0 20.4 19.8  
  Other, non-Hispanic 13.1 9.4 7.1 5.4  
Married      <.0001
  Yes 52.2 63.5 60.5 57.4  
  Other 47.8 36.5 39.5 42.6  
Education      <.0001
   < High school 22.2 15.1 16.1 16.0  
  High school 29.4 23.6 27.2 31.2  
   > High school 48.4 61.4 56.6 52.9  
Income      <.0001
   < $20,000 48.9 32.9 36.7 40.8  
  $20,000–34,999 15.0 15.4 17.7 20.4  
  $35,000–49,999 9.1 9.8 10.6 11.3  
   ≥ $50,000 27.0 41.9 35.1 27.5  
Pre-pregnancy Insurance      <.0001
  Private 45.3 60.0 54.8 49.3  
  Medicaid 20.9 13.9 15.2 19.1  
  Other 2.11 1.9 1.9 2.1  
  Multiple 3.6 3.2 3.3 3.9  
  No insurance 28.0 21.0 24.8 25.6  
Medical-reproductive      
Previous live birth      <.0001
  0 51.6 45.8 38.7 34.7  
  1–2 40.8 45.7 49.0 51.4  
   ≥ 3 7.6 8.6 12.3 13.9  
Pre-pregnancy diabetes 1.6 1.4 2.2 3.9 <.0001
Pre-pregnancy hypertension 7.1 7.1 9.0 13.3 <.0001
Unintended Pregnancy 50.0 40.6 42.0 45.9 <.0001
Socio-behavioral      
Pre-pregnancy smoking 30.7 22.5 24.5 28.3 <.0001
Average # of alcohol drink/week     <.0001
  None 17.7 15.6 17.2 19.8  
  Up to 3 68.9 67.5 67.3 68.3  
  4 or more 11.4 15.0 13.4 10.3  
Pre-pregnancy dieting 8.1 21.0 36.5 41.4 <.0001
Pre-pregnancy exercising 31.0 45.8 42.8 35.3 <.0001
Intimate partner violence 4.4 2.8 3.2 3.2 0.0085
  1. Weighted N = adjusted for the complex sampling design and represents the total population that the sampled was derived from