Sex, % female | 48.3 | 49.3 |
No siblings at age 5 | 7.0 | 6.2 |
Older siblings | 52.8 | 49.3 |
Younger siblings | 56.5 | 61.7 |
| | |
Family history of atopy: asthma or hay fever, assessed at age 5 |
Maternal history (n=1107) | 29.4 | 30.7 |
Paternal history (n=1091) | 30.0 | 30.0 |
Both parents (n=1098) | 8.9 | 9.3 |
At least one of the parents (n=1098) | 50.7 | 51.3 |
Siblings history (n=1004) | 19.3 | 21.4 |
At least one of the family members (n=1081) | 56.4 | 58.0 |
| | |
Maternal education |
Low | 26.1 | 27.4 |
Middle | 41.9 | 41.0 |
High | 32.0 | 31.6 |
| | |
Exclusive breast feeding period |
≤2 weeks | 33.4 | 26.9 |
>2 but ≤5 weeks | 14.8 | 14.8 |
>5 weeks but ≤3 months | 22.5 | 27.0 |
>3 but ≤4 months | 10.1 | 8.7 |
>4 but ≤6 months | 10.9 | 14.5 |
≥6 months | 8.3 | 8.1 |
| | |
Pets at home |
Exposure before birth | 55.5 | 60.4 |
Exposure at age 1 | 51.8 | 58.0 |
Exposure at age 2 | 51.8 | 52.8 |
Exposure at age 5 | 49.4 | 50.9 |
| | |
Day care attendance until school age | 24.9 | 24.7 |
Exposure until age 1 | 17.9 | 17.5 |
Exposure age one until 2 | 20.7 | 20.2 |
Exposure age 2 until 3 | 19.9 | 21.2 |
Exposure age 3 until 4 | 19.9 | 19.5 |
| | |
Smoking in the household |
Exposure during pregnancy (maternal only) | 17.5 | 16.8 |
Exposure at age 1 | 30.8 | 31.1 |
Exposure at age 2 | 32.9 | 32.1 |
Exposure at age 5 | 37.8 | 37.1 |