| Characteristics | rBO+ (n = 233) | rBO− (n = 216) | p Value |
| Boys | 140 (60.1) | 102 (47.2) | 0.006 |
| Age at 2 y visit (months) | 26.0 (2.8) | 27.7 (3.8) | <0.001 |
| Age at 10 y visit (years) | 10.3 (0.7) | 10.3 (0.8) | 0.58 |
| Weight at 2 y visit (kg) | 13.4 (1.5) | 13.4 (1.6) | 0. 057 |
| Weight at 10 y visit (kg) | 37.8 (7.9) | 36.8 (7.6) | 0.17 |
| Height at 2 y visit (cm) | 89.1 (3.8) | 90.2 (4.2) | 0.005 |
| Height at 10 y visit (cm) | 143.7 (7.2) | 143.0 (7.5) | 0.33 |
| Parental atopy reported by 2 y of age* | 129 (55.4) | 64 (29.67) | <0.001 |
| Atopic dermatitis by 2 y | 88 (37.9) | 60 (27.8) | 0.022 |
| Allergic sensitisation by 2 y† | 22 (9.9) | 17 (8.1) | 0.52 |
rBO+ children had ⩾2 episodes or ⩾4 weeks persistent, doctor confirmed, bronchial obstruction (BO) by 2 years of age. rBO− subjects had no symptoms or signs of BO by 2 years.
Data are presented as n (%) or mean (SD).
*Parental atopy: asthma and/or allergic rhinitis reported in at least one parent.
†Allergic skin sensitisation considered positive with ⩾1 positive skin prick test to common allergens.