Table 3.
Grading of Spirometry Results
| ATS/ERS Grade | Pre-bronchodilator | Post-bronchodilator | ||
|---|---|---|---|---|
| FEV1 n = 145 | FVC n = 145 | FEV1 n = 145 | FVC n = 145 | |
| A | 97 (67%) | 92 (63%) | 101 (68%) | 94 (64%) |
| B | 29 (20%) | 21 (15%) | 26 (18%) | 29 (20%) |
| C | 5 (3%) | 7 (5%) | 9 (6%) | 6 (4%) |
| D | 1 (1%) | 4 (3%) | 2 (1%) | 5 (3%) |
| E | 10 (7%) | 18 (12%) | 5 (3%) | 8 (6%) |
| U-Useable | 2 (1%) | 0 (0%) | 1 (1%) | 2 (1%) |
| F | 1 (1%) | 3 (2%) | 1 (1%) | 1 (1%) |
Data are presented as Number (%)
Abbreviations: ATS/ERS American thoracic society/european respiratory society, FEV1 Forced expiratory volume in one second, FVC Forced vital capacity. Grading System for FEV1 and FVC36