| Unadjusted RR (95% CI) | Adjusted RR (95% CI) |
---|---|---|
Race/Ethnicity | ||
 White - NH | 1.00 (Reference) | 1.00 (Reference) |
 Black - NH | 1.04 (0.99, 1.09) | 1.13 (1.08, 1.19) |
 Asian - NH | 1.10 (1.04, 1.17) | 1.21 (1.14, 1.28) |
 Hispanic | 0.88 (0.85, 0.92) | 0.99 (0.95, 1.03) |
 Native American - NH | 0.86 (0.77, 0.96) | 0.93 (0.84, 1.04) |
Maternal Age (years) | ||
  < 20 | – | 0.81 (0.77, 0.84) |
 20–24 | – | 1.00 (Reference) |
 25–29 | – | 1.21 (1.17, 1.24) |
 30–34 | – | 1.51 (1.45, 1.56) |
 35–39 | – | 1.94 (1.85, 2.02) |
  ≥ 40 | – | 2.31 (2.14, 2.48) |
Married Marital Status | – | 0.98 (0.95, 1.01) |
Urban County of Residence | – | 0.94 (0.91, 0.96) |
Education | ||
  < 12 | – | 1.13 (1.07, 1.19) |
 High School Degree | – | 1.13 (1.09, 1.18) |
 Some College | – | 1.05 (1.02, 1.08) |
 At least College Degree | – | 1.00 (Reference) |
Insurance Status at Time of Birth | ||
 Private | – | 1.00 (Reference) |
 Medicaid | – | 0.98 (0.95, 1.01) |
 Self-Pay | – | 0.89 (0.83, 0.95) |
 Other | – | 1.02 (0.96, 1.07) |
Pre-Pregnancy BMI | ||
 Underweight (<18.5) | – | 0.82 (0.76, 0.88) |
 Normal (18.5–24.99) | – | 1.00 (Reference) |
 Overweight (25–29.99) | – | 1.34 (1.30, 1.38) |
 Obese (30–39.99) | – | 1.76 (1.71, 1.81) |
 Morbidly Obese (40–49.99) | – | 2.22 (2.13, 2.31) |
 Super Obese (≥50) | – | 2.88 (2.67, 3.11) |
Used Tobacco During Pregnancy | – | 0.93 (0.90, 0.96) |