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

-

NO_x (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)].

Lindgren et al. International Journal of Health Geographics 2009 8:2   doi:10.1186/1476-072X-8-2