Relations between traffic density and the NO (μmol/l) concentration in the toll station workers among non-smokers (n = 42)
| Increase in NO | Increase in log(NO) | |||||||
|---|---|---|---|---|---|---|---|---|
| Unadjusted | Adjusted* | Unadjusted | Adjusted* | |||||
| B | 95% CI | B | 95% CI | B | 95% CI | B | 95% CI | |
| *Adjusted for age, use of motorcycle, daily burning of incense, and wearing of mask. | ||||||||
| Average exposure to cars (per 1000 vehicles/hour) | 16.36 | −63.62 to 96.34 | 2.65 | −92.82 to 98.12 | 0.25 | −0.29 to 0.79 | 0.22 | −0.65 to 1.09 |
| Average exposure to trucks and buses (per 1000 vehicles/hour) | 127.59 | −17.34 to 272.52 | 160.48 | −19.56 to 340.53 | 0.62 | −0.90 to 2.13 | 1.24 | −0.26 to 2.75 |
| Cumulative exposure to cars (per 1000 vehicles) | 8.77 | −1.09 to 18.63 | 4.97 | −9.40 to 19.34 | 0.08 | 0.01 to 0.14 | 0.08 | −0.03 to 0.19 |
| Cumulative exposure to trucks and buses (per 1000 vehicles) | 21.19 | −13.78 to 56.17 | 29.11 | −17.98 to 76.20 | 0.15 | −0.12 to 0.42 | 0.26 | −0.02 to 0.54 |