Season of birth |
October to January |
224/631 |
35.5 |
|
February to April |
169/631 |
26.8 |
|
May to July |
145/631 |
23.0 |
|
August to September |
93/631 |
14.7 |
Sex |
Female |
324/631 |
51.3 |
|
Male |
307/631 |
48.7 |
Highest parental education |
Low (<10 years) |
15/631 |
2.4 |
|
Medium (=10 years) |
268/631 |
42.5 |
|
High (>10 years) |
348/631 |
55.2 |
Parental atopy |
No |
342/631 |
54.2 |
|
Yes |
289/631 |
45.8 |
Older siblings |
No |
416/631 |
65.9 |
|
Yes |
215/631 |
34.1 |
Smoking during pregnancy |
No |
514/612 |
84.0 |
|
Yes |
98/612 |
16.0 |
Smoking at home between birth and 4 years |
Never |
318/629 |
50.6 |
|
Likely never |
56/629 |
8.9 |
|
Ever |
255/629 |
40.5 |
Exclusive breastfeeding first 4 months |
No |
262/619 |
42.3 |
|
Yes |
357/619 |
57.7 |
Birth weight (grams) |
Mean and SD |
3509.0 |
453.9 |
Changed place of residence between birth and 2 years |
No |
471/631 |
74.6 |
|
Yes |
160/631 |
25.4 |