Table 2 Current asthma in relation to traffic.

n^c

n, %

Adj OR^d

n^c

n, %

Adj OR^d

Heavy traffic

No

5441

187(3.4%)

1.00

5341

87(1.6%

1.00

Yes

2881

137(4.8%)

1.32(1.05–1.66)

2805

61(2.2%)

1.28(0.92–1.79)

Heaviest road radie <100 m

no heavy road

3371

117(3.5%)

1.00

3316

62(1.9%)

1.00

<2 cars/min

2014

79(3.9%)

1.13(0.84–1.51)

1966

31(1.6%)

0.82(0.53–1.28)

2–5 cars/min

1608

54(3.4%)

0.96(0.69–1.33)

1584

30(1.9%)

0.98(0.63–1.53)

6–10 cars/min

781

37(4.7%)

1.34(0.92–1.96)

759

15(2.0%)

0.95(0.54–1.69)

>10 cars/min

511

35(6.8%)

1.83(1.23–2.72)

485

9(1.9%)

0.96(0.47–1.96)

NOx (ug/m3)

0–8

1665

68(4.1%)

1.00

1624

27(1.7%)

1.00

8–11

1669

70(4.2%)

1.04(0.74–1.46)

1630

31(1.9%)

1.13(0.67–1.91)

11–14

1661

52(3.1%)

0.74(0.51–1.07)

1641

32(2.0%)

1.15(0.69–1.94)

14–19

1674

51(3.0%)

0.73(0.50–1.05)

1655

32(1.9%)

1.05(0.62–1.76)

>19

1616

81(5.0%)

1.15(0.82–1.61)

1560

25(1.6%)

0.91(0.52–1.58)

p-trend

0.669

p-trend

0.553