Pooled odds ratios (ORs) for association between parental tobacco smoke exposure and asthma, wheeze, and chronic cough in school age children
| Asthma | Wheeze | Cough | ||||
|---|---|---|---|---|---|---|
| Smoking status | OR | 95% CI | OR | CI | OR | CI |
| *Not significant. | ||||||
| 1 or both parents | 1.21 | 1.10 to 1.34 | 1.24 | 1.17 to 1.31 | 1.40 | 1.27 to 1.53 |
| 1 parent | 1.04* | 0.78 to 1.38 | 1.18 | 1.08 to 1.29 | 1.29 | 1.11 to 1.51 |
| Both parents | 1.50 | 1.29 to 1.73 | 1.47 | 1.14 to 1.90 | 1.67 | 1.48 to 1.89 |
| Mother only | 1.36 | 1.20 to 1.55 | 1.28 | 1.19 to 1.38 | 1.40 | 1.20 to 1.64 |
| Father only | 1.07* | 0.92 to 1.24 | 1.14 | 1.06 to 1.23 | 1.21 | 1.09 to 1.34 |