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Table 4 Geographical stratification. Current non-allergic asthma in the city of Malmö and the region outside.

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

   Current asthma, non-allergica
   Malmö Region outside Malmö
   nb n, % Adj ORc nb n, % Adj ORc
Heavy Traffic No 1557 26(1.7%) 1.00 3700 60(1.6%) 1.00
  Yes 1599 34(2.1%) 1.31(0.78–2.21) 1159 27(2.3%) 1.37(0.86–2.17)
Heaviest road radie <100 m (cars/min) No heavy road 512 11(2.1%) 1.00 2766 51(1.8%) 1.00
  <2 cars/min 902 17(1.9%) 0.88(0.41–1.89) 1045 14(1.3%) 0.73(0.40–1.33)
  2–5 cars/min 726 11(1.5%) 0.73(0.31–1.70) 839 19(2.3%) 1.17(0.68–2.00)
  6–10 cars/min 567 12(2.1%) 0.94(0.41–2.17) 181 3(1.7%) 0.82(0.25–2.66)
  >10 cars/min 449 9(2.0%) 1.00(0.41–2.46) 28 0 -
NOx (ug/m3) 0–8 12 0 - 1595 27(1.7%) 1.00
  8–11 39 0 - 1578 31(2.0%) 1.15(0.68–1.95)
  11–14 501 15(3.0%) 1.00 1117 17(1.5%) 0.86(0.46–1.59)
  14–19 1181 20(1.7%) 0.51(0.26–1.02) 455 12(2.6%) 1.50(0.75–3.00)
  >19 1423 25(1.8%) 0.58(0.30–1.12) 114 0(0%) -
    p-trend 0.501   p-trend 0.677
  1. aAsthma triggered by other factors
  2. b Individuals with allergic current asthma were excluded from the analysis of non-allergic current asthma in relation to traffic.
  3. c OR:s, 95% CI, Adjusted for age, sex and smoking