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Table 1 Individual-level characteristics of study sample, Raleigh crime report area, 1999–2001*

From: Violent crime exposure classification and adverse birth outcomes: a geographically-defined cohort study

   NH White N (%) NH Black N (%) % PTB % LBW PR** (95% CI)
Preterm birth   471 (6.7) 539 (12.8) 8.7 70.6 1.91 (1.69, 2.15)
Low birth weight   308 (4.4) 485 (11.5) 70.6 6.9 2.49 (2.17, 2.87)
(column percent) Individual-level maternal characteristics
Marital status       
  Married 6611 (89.7) 1815 (41.5) 7.3 5.2 0.46 (0.44, 0.48)
  Not married 761 (10.3) 2562 (58.5) 11.8 10.6 5.70 (5.30, 6.12)
Maternal age       
  < 20 years 210 (2.9) 555 (12.7) 9.7 9.9 4.45 (3.81, 5.19)
  20–24 years 772 (10.5) 1344 (30.7) 9.4 8.2 3.11 (2.87, 3.38)
  25–29 years 2000 (27.1) 1155 (27.4) 8.7 6.1 0.97 (0.91, 1.03)
  30–34 years 2798 (38.0) 823 (18.8) 7.5 5.8 0.50 (0.46, 0.53)
  35+ years 1592 (21.6) 500 (11.4) 9.3 6.8 0.53 (0.48, 0.58)
Maternal education       
  < 12 years 309 (4.2) 794 (18.2) 10.3 8.6 4.33 (3.82, 4.91)
  12 years 936 (12.7) 1350 (30.9) 10.6 9.2 2.43 (2.26, 2.62)
  > 12 years 6110 (83.1) 2219 (50.9) 7.6 5.6 0.61 (0.59, 0.63)
  1. * Distribution, percent preterm birth, percent low birth weight and prevalence ratio [PR] (95% confidence intervals [95% CI]) for individual-level attributes of women living in Raleigh crime report area, 1999–2001
  2. **PR = prevalence in blacks/prevalence in whites