Table 2.
Standard spirometry parameters for different asthma status
| Parameters | Asthma status | |||
|---|---|---|---|---|
| Uncontrolled | Partially controlled | Controlled | P-value | |
| FVC (L) | 3.5 (1.2) | 3.4 (1) | 4.2 (1) | 0.002 |
| FEV1 (L) | 2.4 (0.9) | 2.4 (0.8) | 3.1 (0.9) | 0.000 |
| FEF25-75 (L) | 1.8 (1.2) | 1.6 (0.9) | 2.6 (1.1) | 0.000 |
| FVC (% predicted) | 99 (17) | 102(14) | 107 (11) | 0.024 |
| FEV1 (% predicted) | 80 (20) | 83 (15) | 95 (13) | 0.000 |
| FEF25-75 (% predicted) | 47 (26) | 46 (22) | 66 (23) | 0.000 |
| FEV1/FVC ratio | 67 (10) | 68 (10) | 75 (8) | 0.000 |
Notes: Data are presented as mean (SD). FEF25-75 corresponds to forced expiratory flow from 25% to 75% of vital capacity ( absolute values).