Table 1.
Study population characteristics
| Healthy | Obstruction | Other pulmonary diseases | |
|---|---|---|---|
| Subjects, n | 157 | 651 | 168 |
| Age, years | 53 (41–64) | 55 (42–65) | 57 (44–67) |
| Smoking, pack yr. | 0 (0–5) | 0 (0–30) | 0 (0–15) |
| BMI, kg/m2 | 25.3 (21.6–28.7) | 25.2 (21.1–29.7) | 27.6 (23.1–32.0) |
| FEV1, %predicted | 103.3 (91.5–114.7) | 84.2 (67.0–97.7) | 88.1 (74.4–103.8) |
| FVC, %predicted | 106.6 (97.2–114.9) | 97.7 (84.4–110.4) | 92.1 (76.5–107.8) |
| DLCO, %predicted | 86.4 (77.0–99.2) | 78.7 (63.0–89.9) | 70.3 (56.3–85.7) |
| RV, %predicted | 106.9 (91.6–129.7) | 131.6 (104.0–159.9) | 101.8 (80.9–124.6) |
| TLC, %predicted | 104.6 (95.7–112.1) | 106.0 (94.8–117.1) | 88.6 (79.7–103.4) |
| FRC, %predicted | 105.1 (93.4–123.1) | 119.4 (99.2–143.3) | 95.7 (78.0–116.5) |
| RAW, kPa/L/s | 0.24 (0.18–0.30) | 0.32 (0.23–0.45) | 0.25 (0.17–0.35) |
| sGAW, 1/ kPa*sec | 1.21 (0.95–1.57) | 0.84 (0.56–1.17) | 1.28 (0.90–1.71) |
Definition of abbreviations: BMI body mass index, D L,CO carbon monoxide diffusing capacity, FEV 1 forced expiratory volume in one second, FRC functional residual capacity, FVC forced vital capacity, RV residual volume, R AW airway resistance, sG AW specific airway conductance, TLC total lung capacity, Values are median and IQR