Table 3. Spirometry indices and pattern pre and post bronchodilator (N=53).
| Spirometry indices |
Pre bronchodilator, mean (SD)* |
Post bronchodilator, mean (SD)* |
| FVC, L | 1.93 (0.60) | 1.97 (0.58) |
| FVC Z-score | –3.08 (1.85) | –2.97 (1.80) |
| FVC % predicted, median (IQR) | 53.3 (40.8 - 72.9) | 55.4 (41.4 - 69.3) |
| FEV1, L | 1.22 (0.53) | 1.29 (0.50) |
| FEV1 Z-score | –3.50 (1.82) | –3.36 (1.76) |
| FEV1 % predicted, median (IQR) | 40.2 (29.0 - 55.3) | 44.3 (32.6 - 57.4) |
| FEV1/FVC% | 61.83 (15.42) | 65.0 (15.68) |
| FEV1/FVC Z-score, median (IQR) | –2.67 (–3.79 - –1.06) | –2.39 (–3.30 - –0.78) |
| FEV1 Z-score grading, n(%) | ||
| Mild (≥ −2.0) | 10 (18.9) | 10 (18.9) |
| Moderate (–2.5 - –2.0) | 0 | 2 (3.8) |
| Moderately severe (−3.0 - −2.5) | 6 (11.3) | 6 (11.3) |
| Severe (−4.0 - −3.0) | 12 (22.6) | 14 (26.4) |
| Very severe (< −4.0) | 25 (47.2) | 21 (39.6) |
| Spirometry pattern, n(%) | ||
| Mixed | 30 (56.6) | 25 (47.2) |
| Probable restriction | 11 (20.8) | 17 (32.1) |
| Obstructive | 6 (11.3) | 5 (9.4) |
| Normal | 6 (11.3) | 6 (11.3) |
SD = standard deviation
IQR = interquartile range
FEV1 = forced expiratory volume in one second
FVC = forced vital capacity
* Unless otherwise specified