Smokers/ex-smokers | Non-smokers | ||||||
---|---|---|---|---|---|---|---|
n | COPD D | OR a | n | COPD D | OR a | ||
Heavy traffic | No | 3149 | 167(5.3%) | 1.00 | 2892 | 76(2.6%) | 1.00 |
Yes | 1861 | 130(7.0%) | 1.43(1.13–1.82) | 1414 | 42(3.0%) | 1.19(0.81–1.76) | |
Heaviest road within <100 m | no heavy road | 1951 | 104(5.3%) | 1.00 | 1804 | 49(2.7%) | 1.00 |
<2 cars/min | 1185 | 67(5.7%) | 1.06(0.77–1.45) | 1050 | 28(2.7%) | 0.99(0.62–1.59) | |
2–5 cars/min | 992 | 52(5.2%) | 0.99(0.70–1.40) | 828 | 19(2.3%) | 0.88(0.51–1.51) | |
6–10 cars/min | 522 | 44(8.4%) | 1.56(1.08–2.26) | 364 | 16(4.4%) | 1.64(0.92–2.94) | |
>10 cars/min | 344 | 28(8.1%) | 1.84(1.18–2.86) | 234 | 6(2.6%) | 1.15(0.48–2.75) | |
NOx (μg/m3) | 0–8 | 969 | 47(4.9%) | 1.00 | 886 | 27(3.0%) | 1.00 |
8–11 | 971 | 47(4.8%) | 0.96(0.63–1.46) | 884 | 21(2.4%) | 0.77(0.43–1.37) | |
11–14 | 945 | 63(6.7%) | 1.35(0.92–2.00) | 910 | 24(2.6%) | 0.92(0.52–1.61) | |
14–19 | 1037 | 60(5.8%) | 1.14(0.92–2.00) | 821 | 23(2.8%) | 0.85(0.48–1.50) | |
>19 | 1072 | 78(7.3%) | 1.61(1.11–2.35) | 779 | 23(3.0%) | 1.12(0.63–1.98) | |
Test för | Heavy traffic*eversmoker | p = 0.47 | |||||
Interaction | Heaviestroad100 m*eversmoker | p = 0.89 | |||||
NOx*eversmoker | p = 0.83 |