Table 3 Grading of Spirometry Results
From: Identifying airway obstruction in primary care: is there a role for physiotherapists?
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%) |