Univariate test of various possible risk factors for wheezing and allergic sensitisation at 1 yr of age using Fisher's exact test in 42 children with respiratory syncytial virus (RSV) bronchiolitis and 84 controls
| Risk factor | Wheezing | Recurrent wheezing | Sensitisation | ||||||
| p-value | OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | |
| RSV bronchiolitis | <0.0001 | 10.92 | 4.56–26.14 | <0.0001 | 12.10 | 3.22–45.55 | <0.0001 | 20.50 | 4.38–95.89 |
| Mild RSV infection | 0.65 | 0.74 | 0.30–1.85 | 0.36 | 0.44 | 0.09–2.06 | 0.12 | 0.20 | 0.02–1.55 |
| Smoking | |||||||||
| By father | 0.02 | 2.03 | 1.15–5.63 | 0.25 | 1.98 | 0.68–5.79 | 0.5626 | 1.46 | 0.49–4.36 |
| By mother | <0.0001 | 6.41 | 2.65–15.46 | <0.01 | 5.14 | 1.72–15.34 | <0.0001 | 9.90 | 3.09–31.68 |
| During pregnancy | <0.01 | 4.33 | 1.73–10.82 | <0.0001 | 10.56 | 3.34–33.32 | <0.0001 | 10.56 | 3.34–33.32 |
| Furred animals | 0.82 | 1.12 | 0.47–2.69 | 0.76 | 1.13 | 0.34–3.83 | 0.12 | 0.20 | 0.02–1.55 |
| Heredity asthma | 0.21 | 0.77 | 0.77–5.02 | 0.48 | 1.70 | 0.49–5.88 | 1.00 | 1.11 | 0.29–4.26 |
| Double heredity asthma | 0.15 | 2.81 | 0.71–11.10 | 0.32 | 2.10 | 0.40–11.14 | 1.00 | 0.42 | 0.05–3.44 |
| Heredity atopy | 1.00 | 0.93 | 0.44–1.97 | 0.79 | 1.20 | 0.42–3.44 | 0.28 | 0.98 | 0.20–4.78 |
| Double heredity atopy | 0.15 | 0.73 | 0.22–2.44 | 0.41 | 1.88 | 0.47–7.58 | <0.01 | 6.00 | 1.80–19.98 |
| Male sex | 0.06 | 2.22 | 1.04–4.47 | 0.79 | 0.77 | 0.26–2.27 | <0.01 | 4.86 | 1.47–16.05 |
| More than one sibling | <0.01 | 4.47 | 1.23–16.23 | 0.03 | 3.80 | 1.20–12.00 | 0.14 | 1.67 | 0.82–8.72 |
OR: odds ratio
CI: confidence interval