Table 6.
Geographical stratification. COPD diagnosis in Malmö and the region outside.
| Malmö | Region outside Malmö | ||||||
| n | COPD | OR a | n | COPD | OR a | ||
| Heavy traffic | No | 1767 | 85(4.8%) | 1.00 | 4178 | 152(3.6%) | 1.00 |
| Yes | 1877 | 103(5.5%) | 1.24(0.92–1.67) | 1343 | 69(5.1%) | 1.47(1.09–1.97) | |
| Heaviest road within <100 m | no heavy road | 586 | 28(4.8%) | 1.00 | 3124 | 124(4.0%) | 1.00 |
| <2 cars/min | 1021 | 44(4.3%) | 0.89(0.55–146) | 1193 | 49(4.1%) | 1.06(0.75–1.49) | |
| 2–5 cars/min | 837 | 35(4.2%) | 0.89(0.53–1.48) | 961 | 35(3.6%) | 0.93(0.64–1.37) | |
| 6–10 cars/min | 663 | 50(7.5%) | 1.53(0.95–2.48) | 212 | 10(4.7%) | 1.20(0.62–2.35) | |
| >10 cars/min | 537 | 31(5.8%) | 1.34(0.79–2.28) | 31 | 3 | - | |
| NOx (μg/m3) | 0–8 | 13 | 0 | - | 1824 | 72(3.9%) | 1.00 |
| 8–11 | 46 | 2 | - | 1792 | 66(3.7%) | 0.90(0.64–1.27) | |
| 11–14 | 562 | 27(4.8%) | 1.00 | 1268 | 60(4.7%) | 1.26(0.89–1.80) | |
| 14–19 | 1325 | 64(4.8%) | 0.94(0.59–1.49) | 510 | 18(3.5%) | 0.91(0.54–1.55) | |
| >19 | 1698 | 95(5.6%) | 1.23(0.79–1.92) | 127 | 5(3.9%) | 1.19(0.47–3.02) | |
| p-trend | 0.142 | p-trend | 0.421 | ||||
a Adjusted for age, sex, and smoking. [OR (95%CI)].