| Written questionnaire | Video questionnaire | |
| Ever wheeze | ||
| SGA | 1.06 (0.98–1.15) | 1.06 (0.96–1.17) |
| Not SGA | 1.07** (1.04–1.10) | 1.10** (1.07–1.14) |
| Current wheeze | ||
| SGA | 1.08 (0.92–1.26) | 1.04 (0.84–1.29) |
| Not SGA | 1.06* (1.00–1.11) | 1.07* (1.00–1.14) |
| Night wheeze | ||
| SGA | 0.94 (0.77–1.15) | 0.96 (0.84–1.10) |
| Not SGA | 1.01 (0.95–1.08) | 1.07** (1.02–1.12) |
| Severe wheeze | ||
| SGA | 0.91 (0.69–1.19) | 1.02 (0.93–1.13) |
| Not SGA | 1.04 (0.96–1.14) | 1.09** (1.05–1.12) |
| Wheeze with exercise | ||
| SGA | 1.11* (1.02–1.20) | 1.15** (1.07–1.23) |
| Not SGA | 1.16** (1.13–1.20) | 1.17** (1.14–1.20 |
| Asthma | ||
| SGA | 1.01 (0.91–1.13) | |
| Not SGA | 1.02 (0.99–1.06) | |
| Night cough | ||
| SGA | 1.08* (1.01–1.16) | 1.09 (0.99–1.20) |
| Not SGA | 1.08** (1.05–1.10) | 1.14** (1.11–1.18) |
Data are presented as OR (95% CI). All models were adjusted for parental education level, number of smokers at home, incense burning, active smoking, alcohol use and history of rhinitis and eczema. *: p<0.05; **: p<0.01.