The incidence rate ratio (IRR) for episodes of recurrent wheeze at 2 years of age are given by factors observed in infants admitted to hospital with acute bronchiolitis, based on zero-truncated negative binomial regression analysis
| Recurrent wheeze IRR (95% CI) | p-value | |
| Viral detection during acute bronchiolitis | ||
| RSV | 0.95 (0.70–1.28) | 0.86 |
| HRV | 0.72 (0.57–0.91) | 0.16 |
| HRV A or B | 0.58 (0.40–0.83) | 0.14 |
| HRV C | 0.84 (0.65–1.09) | 0.51 |
| RSV high genomic load | 0.92 (0.73–1.15) | 0.70 |
| HRV high genomic load | 0.61 (0.38–0.99) | 0.31 |
| Multiple viruses | 0.91 (0.72–1.16) | 0.69 |
| Allergic sensitisation# | ||
| Any sensitisation | 1.46 (0.97–2.19) | 0.36 |
| Any food sensitisation | 1.53 (1.0–2.36) | 0.32 |
| Any inhalant sensitisation | 1.18 (0.48–2.90) | 0.85 |
| Egg sensitisation | 3.58 (1.82–3.58) | 0.059 |
| Cow's milk sensitisation | 0.49 (0.29–0.95) | 0.17 |
| Peanut sensitisation | 1.45 (0.25–8.33) | 0.83 |
| Polysensitisation | 1.44 (0.60–3.49) | 0.68 |
| Salivary morning cortisol | 1.01 (1.0–1.0) | 0.56 |
The zero-truncated negative binomial regression analysis are adjusted for sex, age at inclusion and parental atopy. RSV: respiratory syncytial virus; HRV: human rhinovirus.#: specific immunoglobulin E ≥0.35 kU·L−1.