TABLE 2.
Main characteristics of the offspring (n=383) and offspring-reported information on their mothers
| Mother (generation G1) | |
| Smoking before or after offspring's birth | |
| Present | 50.7 |
| Absent | 25.3 |
| Unknown | 24.0 |
| Offspring (generation G2) | |
| Female | 52.0 |
| Age years | 28 (18–47) |
| Pre-bronchodilator FEV1 z-score | −0.38±0.75 |
| Pre-bronchodilator FVC z-score | −0.23±0.83 |
| Pre-bronchodilator FEV1/FVC z-score | −0.26±0.91 |
| Ever smoking | 30.3 |
| Education level | |
| Low# | 37.9 |
| High | 57.4 |
| Unknown | 4.7 |
Data are presented as %, median (range) or mean±sd. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity. #: offspring had only studied up to the minimum school-leaving age.