Univariate and multivariate analysis of exposures and current self-reported asthma on the written questionnaire
| Risk factor | Current wheeze n=847 (%) | No current wheeze n=3132 (%) | Univariate analysis | Multivariate analysis | ||
| OR (95% CI) | p-value | OR (95% CI) | p-value | |||
| Sex (male) | 327 (38.6) | 1404 (44.8) | 0.77 (0.66–0.90) | 0.001 | 0.79 (0.67–0.93) | 0.006 |
| Private school | 69 (8.1) | 139 (4.4) | 1.90 (1.40–2.60) | <0.001 | 1.66 (1.20–2.30) | 0.002 |
| Outdoor pollution | 303 (35.8) | 1031 (32.9) | 1.10 (1.00–1.30) | 0.115 | ||
| Self-reported smoking (current) | 113 (13.3) | 235 (7.5) | 1.90 (1.49–2.41) | <0.001 | 1.88 (1.46–2.410 | <0.001 |
| Maternal smoking | 235 (27.7) | 747 (23.9) | 1.23 (1.03–1.46) | 0.019 | 1.07 (0.88–1.29) | 0.520 |
| Paternal smoking | 325 (38.4) | 1077 (34.4) | 1.18 (1.01–1.39) | 0.036 | 1.13 (0.95–1.35) | 0.168 |
| Wood used for heating or cooking | 76 (9.0) | 212 (6.8) | 1.36 (1.03–1.79) | 0.029 | 1.18 (0.88–1.57) | 0.271 |
| Exposure to pets | 633 (74.7) | 2078 (66.3) | 1.50 (1.26–1.78) | <0.001 | 1.40 (1.16–1.67) | <0.001 |
| Mother or father employed | 781 (92.2) | 2742 (87.5) | 1.57 (1.18–2.08) | 0.002 | 1.48 (1.10–2.00) | 0.011 |
| Home type – informal | 85 (10.0) | 332 (10.6) | 0.94 (0.73–1.21) | 0.634 | ||
| Household assets (<7 items) | 369 (43.6) | 1606 (51.3) | 1.36 (1.17–1.59) | <0.001 | 0.86 (0.73–1.01) | 0.078 |
| Body mass index above 25 kg·m−2 | 171 (20.2) | 576 (18.4) | 1.12 (0.93–1.36) | 0.240 | ||