Table 2.
Univariate analysis of the association between occupational and environmental factors and CRS
| Non-CRS n(%) | CRS n(%) | OR(95 % CI) | P-value | |
|---|---|---|---|---|
| Clearance-related job | 239(2.5) | 32(3.9) | 1.56(1.07,2.27) | 0.020 |
| Health care-related job | 489(5.2) | 47(5.7) | 1.11(0.82,1.51) | 0.509 |
| Occupational exposure to dust | 542(5.6) | 101(12.0) | 2.32(1.85,2.91) | 0.001 |
| Occupational exposure to poisonous gas | 255(2.6) | 58(6.9) | 2.75(2.05,3.69) | 0.001 |
| Any pet at home | 1121(13.4) | 154(19.8) | 1.60(1.32,1.92) | 0.001 |
| Any large piece of carpet at home | 540(6.5) | 92(11.9) | 1.95(1.54,2.46) | 0.001 |
| Any carpet at workplace | 89(1.1) | 51(6.6) | 6.55(4.60,9.32) | 0.001 |
| Method used to cook at home | ||||
| Electric or centralized heating | 9352(96.1) | 814(96.3) | 1 | 0.559 |
| Coal | 149(1.5) | 15(1.8) | 1.16(0.68,1.97) | |
| Firewood | 234(2.4) | 16(1.9) | 0.79(0.47,1.31) | |
| Method of keeping warm in winter | ||||
| Electric or centralized heating | 6380(96.4) | 521(94.2) | 1 | 0.003 |
| Coal | 137(2.1) | 1313(2.4) | 1.16(0.65,2.07) | |
| Firewood/charcoal | 100(1.5) | 19(3.4) | 2.33(1.41,3.83) | |
| Use of air conditioning in summer | ||||
| < 3 days/week | 5154(60.7) | 439(56.6) | 1 | 0.016* |
| 3–6 days/week | 2137(25.2) | 208(26.8) | 1.14(0.96,1.36) | |
| Everyday | 1200(14.1) | 129(16.6) | 1.26(1.03,1.55) | |
| Exposure to mouldy or damp environments | ||||
| Never | 7111(85.2) | 593(76.5) | 1 | 0.001* |
| Occasionally | 1021(12.2) | 137(17.7) | 1.61(1.32,1.96) | |
| Frequently or everyday | 219(2.7) | 45(5.8) | 2.46(1.77,3.43) |
*Score test for trend of odds