Table 1. Sample characteristics.
| Parents | Offspring | |
|---|---|---|
| Sample | 4601 | 6231 |
| Male,% | 47.3 | 47.0 |
| Height, m | 1.66 (0.09) | 1.69 (0.09) |
| Ever smoked, % | 68.4 | 51.4 |
| Age, years | 59.4 (8.2) | 48.2 (11.4) |
| FVC, l | 3.34 (0.95) | 4.24 (1.06) |
| FEV1, l | 2.46 (0.73) | 3.22 (0.86) |
| FEV1/FVC | 0.74 (0.09) | 0.76 (0.08) |
| FEF25%, l/s | 5.38 (2.09) | 6.83 (2.03) |
| FEF50%, 1/s | 2.91 (1.31) | 3.88 (1.41) |
| FEF75%, l/s | 0.74 (0.44) | 1.21 (0.61) |
| MMEF, l/s | 1.98 (0.92) | 2.91 (1.12) |
| PEF, l/s | 7.11 (2.32) | 8.44 (2.17) |
Notes.
Means (standard deviations) are presented. Sample size is for FVC and varies between variables (see figure legends).