Table 1 Reference sample selection criteria and characteristics of the study sample
Males | Females | |
|---|---|---|
Participants: | (n) | (n) |
Total | 4716 | 5130 |
Less age outside the range | 4293 | 4767 |
Less ever smoking | 2385 | 3382 |
Less invalid or irreproducible data | 1454 | 1825 |
Less non-healthy subjects | 1120 | 1625 |
Age in years | (n) | (n) |
18–45 | 311 | 316 |
46–65 | 472 | 766 |
65–85 | 337 | 543 |
Age (yrs) | 55 ± 16 | 57 ± 14 |
Height (cm) | 173 ± 7 | 161 ± 6 |
FEV1 (L) | 3.4 ± 1.0 | 2.4 ± 0.7 |
FVC (L) | 4.5 ± 1.2 | 3.1 ± 0.8 |