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Table 2 Number and percentages of individual/area-level SEP and personal characteristics by proximity to major roads (≤200 m; >200 m) (n = 16,615)

From: Residential proximity to major roads and adverse birth outcomes: a hospital-based study

  Proximity to major roads
  ≤200 m >200 m
  n (%) n (%)
Individual SEP or personal characteristics   
Household occupation   
  Professional workers (n = 1854) 76 (4.1) 1778 (95.9)
  Employees (n = 13070) 767 (5.9) 12303 (94.1)
  Self-employed/Part-time workers/Unemployed (n = 952) 57 (6) 895 (94)
Maternal smoking   
  Never smoked (n = 15736) 897 (5.7) 14839 (94.3)
  Ex- or current-smoker (n = 686) 46 (6.7) 640 (93.3)
Maternal alcohol drinking   
  Non-drinker (n = 15674) 902 (5.8) 14772 (94.2)
  Drinker (n = 757) 42 (5.5) 715 (94.5)
Paternal smoking   
  Never smoked (n = 8650) 477 (5.5) 8173 (94.5)
  Ex or current-smoker (n = 7152) 436 (6.1) 6716 (93.9)
Maternal obesity   
  Not obese (n = 15215) 855 (5.6) 14360 (94.4)
  Obese (n = 1348) 91 (6.8) 1257 (93.2)
Maternal diabetes   
  No diabetes (n = 15983) 913 (5.7) 15070 (94.3)
  Diabetes (n = 617) 40 (6.5) 577 (93.5)
Maternal hypertension   
  No hypertension (n = 15707) 908 (5.8) 14799 (94.2)
  Hypertension (n = 893) 45 (5) 848 (95)
Area-level SEP at census regions   
Proportion of professional workers   
  Q1 (affluent) (n = 5453) 182 (3.3) 5271 (96.7)
  Q2 (middle) (n = 5524) 401 (7.3) 5123 (92.7)
  Q3 (poor) (n = 5628) 370 (6.6) 5258 (93.4)
Proportion of production or transportation workers   
  Q1 (affluent) (n = 5406) 84 (1.6) 5322 (98.4)
  Q2 (middle) (n = 5589) 452 (8.1) 5137 (91.9)
  Q3 (poor) (n = 5610) 417 (7.4) 5193 (92.6)
  1. SEP; socio-economic position.