Table 6 Prevalence of self-reported hayfever along with crude and adjusted odd ratios, by risk or protective factors
Variable | Totala | Hayfever (%) | Crude OR (95 % CI) | p | Adjusted OR (95 % CI)b | p |
|---|---|---|---|---|---|---|
Frequency of trucks passing near homes on weekdays | ||||||
Never | 563 | 32.7 | 1 | 1 | ||
Seldom | 1033 | 38.7 | 1.22 (0.98–1.51) | 0.074 | 1.12 (0.87–1.43) | 0.362 |
Frequently through the day | 580 | 37.9 | 1.28 (1.00–1.63) | 0.047 | 1.19 (0.90–1.57) | 0.203 |
Almost all day | 1212 | 38.2 | 1.34 (1.08–1.66) | 0.007 | 1.23 (0.96–1.57) | 0.087 |
Sex of child | ||||||
Female | 1790 | 43.2 | 1 | 1 | ||
Male | 1634 | 31.3 | 0.59 (0.51–0.68) | 0.000 | 0.56 (0.47–0.65) | 0.000 |
Vigorous physical activity per week | ||||||
Never or occasionally | 984 | 30.7 | 1 | 1 | ||
Once or twice per week | 1417 | 40.2 | 1.51 (1.27–1.80) | 0.000 | 1.38 (1.44–1.68) | 0.001 |
Three or more times per week | 983 | 40.5 | 1.48 (1.23–1.79) | 0.000 | 1.52 (1.23–1.88) | 0.000 |
Residential fuel heating type most frequently | ||||||
Electricity | 2041 | 35.8 | 1 | |||
Gas | 426 | 43.0 | 1.30 (1.05–1.61) | 0.015 | 1.20 (0.95–1.52) | 0.121 |
Paraffin | 631 | 35.8 | 1.15 (0.94–1.40) | 0.160 | 1.11 (0.89–1.39) | 0.330 |
Open fire | 270 | 43.3 | 1.46 (1.12–1.89) | 0.004 | 1.51 (1.13–2.02) | 0.005 |
ETS exposure at home | ||||||
No | 1460 | 36.1 | 1 | 1 | ||
Yes | 1452 | 40.1 | 1.23 (1.05–1.43) | 0.007 | 1.20 (1.02–1.40) | 0.022 |