Characteristics of the study population
| Characteristics | Available cases (n) | Prevalences and means in available cases | Prevalences and means in imputed dataset (n=2978) |
|---|---|---|---|
| *Educational level: low=primary, lower vocational and lower general; intermediate=senior high school and intermediate vocational; high=higher vocational and university. | |||
| Sex (% boys) | 2978 | 51.7 | 51.7 |
| Mean (SD) birth weight (g) | 2934 | 3517 (536) | 3517 (535) |
| First child (%) | 2966 | 48.8 | 49.1 |
| Breast fed ever (%) | 2936 | 81.9 | 81.9 |
| Breast fed for at least 8 weeks (%) | 2911 | 61.2 | 61.0 |
| Smoking in the home (%) | 2974 | 28.7 | 28.7 |
| Mother allergic (%) | 2978 | 14.2 | 14.3 |
| Father allergic (%) | 2977 | 29.1 | 29.0 |
| Mean (SD) mother’s age (years) | 2933 | 30.4 (3.8) | 30.4 (3.8) |
| Mother’s educational level*: | 2859 | ||
| Low (%) | 23.2 | 23.4 | |
| Intermediate (%) | 42.2 | 42.3 | |
| High (%) | 34.6 | 34.3 | |
| Ever asthma (%) | 2902 | 6.3 | 6.6 |
| Recent asthma (%) | 2898 | 4.6 | 4.9 |
| Recent wheeze (%) | 2894 | 14.6 | 14.8 |