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Table 3 Geographical stratification.

From: Traffic exposure associated with allergic asthma and allergic rhinitis in adults. A cross-sectional study in southern Sweden

   Current asthma, allergica
   Malmö Region outside Malmö
   nb n, % Adj ORc nb n, % Adj ORc
Heavy traffic No 1586 55(3.5%) 1.00 3768 128(3.4%) 1.00
  Yes 1641 76(4.6%) 1.22(0.85–1.75) 1189 57(4.8%) 1.38(1.00–1.91)
Heaviest road radie <100 m (cars/min) No road 517 16(3.1%) 1.00 2815 100(3.6%) 1.00
  <2 917 32(3.5%) 1.15(0.62–2.12) 1077 46(4.3%) 1.19(0.83–1.71)
  2–5 740 25(3.4%) 1.08(0.57–2.05) 847 27(3.2%) 0.89(0.58–1.37)
  6–10 581 26(4.5%) 1.49(0.79–2.82) 189 11(5.8%) 1.66(0.87–3.18)
  >10 472 32(6.8%) 1.96(1.05–3.66) 29 1 -
NOx (ug/m3) 0–8 12 0 - 1635 67(4.1%) 1.00
  8–11 43 4 - 1612 65(4.0%) 0.99(0.70–1.41)
  11–14 499 13(2.6%) 1.00 1138 38(3.3%) 0.79(0.52–1.19)
  14–19 1197 36(3.0%) 1.12(0.59–2.14) 457 14(3.1%) 0.74(0.41–1.33)
  >19 1476 78(5.3%) 1.78(0.97–3.27) 115 1(0.9%) 0.20(0.03–1.43)
    p-trend 0.019   p-trend 0.029
  1. Current allergic asthma in the city of Malmö and the region outside.
  2. a Asthma triggered by pollen or furred animals
  3. b Individuals with non-allergic current asthma were excluded from the analysis of allergic current asthma in relation to traffic.
  4. c OR:s, 95% CI, Adjusted for age, sex and smoking