Table 3 Geographical stratification.

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