Total participants n (% male) | 167 (57) |
Mean±sd gestational age weeks | 39.3±2.0 |
Mean±sd birth weight kg | 3.3±0.55 |
Caesarean section | 25 (15) |
Season of birth | |
Spring | 62 (37) |
Summer | 44 (26) |
Autumn | 32 (19) |
Winter | 29 (17) |
Mean±sd (range) age at ARI weeks | 29.9±12.5 (2–52) |
Season at first ARI | |
Spring | 40 (24) |
Summer | 14 (8) |
Autumn | 38 (23) |
Winter | 75 (45) |
Increased atopy risk | 109 (65) |
Childcare attendance | 32 (19) |
Breastfeeding status at time of ARI# | 99 (60) |
Environmental tobacco smoke exposure | 24 (14) |
Other siblings (living in the same household) | 106 (63) |
One sibling | 75 (45) |
≥2 siblings | 31 (19) |