TABLE 2.
Characteristics of the 100 cases at study baseline.
| Parameters | Normal | Obstruction | Restriction | Mixed |
| Reports, N | 44 | 18 | 23 | 15 |
| Sex, M/F | 21/23 | 13/5 | 14/9 | 13/2 |
| Age, years | 59.5 (51.3–63.0) | 55.0 (37.0–62.3) | 49.0 (31.0–65.0) | 67.0 (63.0–70.0) |
| FEV1% pred, % | 98.9 (89.6–109.1) | 75.9 (63.6–88.1) | 74.0 (56.4–77.5) | 41.3 (29.8–49.3) |
| FVC% pred, % | 102.1 (94.2–111.3) | 92.6 (87.2–113.4) | 73.7 (53.9–77.8) | 68.2 (44.8–72.8) |
| FEV1/FVC ratio | 0.79 (0.75–0.82) | 0.67 (0.57–0.71) | 0.86 (0.79–0.89) | 0.54 (0.46–0.60) |
| FEF50% % pred, % | 77.6 (59.9–94.3) | 34.9 (23.1–56.5) | 60.0 (49.5–80.9) | 12.9 (9.7–16.6) |
| FEF75% % pred, % | 57.2 (40.1–72.5) | 26.6 (17.1–39.9) | 48.1 (36.8–71.4) | 13.9 (11.2–19.2) |
| MMEF% pred, % | 68.0 (54.0–82.0) | 31.3 (20.0–50.0) | 57.4 (40.7–72.2) | 12.3 (9.1–15.6) |
Data were shown in Median (interquartile range). FEV1, forced expiratory volume in one second; FVC, forced vital capacity; FEFx%, flow at x% FVC; MMEF, maximal mid expiratory flow; % pred, % predicted.