TABLE II.
Standard spirometry for different asthma status
| Asthma status | P value* | |||||
|---|---|---|---|---|---|---|
| Healthy (n=14) |
Controlled (n=57) |
Uncontrolled (n=44) |
H vs. C | H vs. U | C vs. U | |
| FVC, L | 3.3 | 3.1 | 3.1 | .9819 | .7359 | .6662 |
| FEV1, L | 3.0 | 2.7 | 2.4 | .6130 | .0982 | .0587 |
| FEF25–75, L · s−1 | 3.1 | 3.0 | 2.3 | .2914 | .0008 | <.0001 |
| FEV% predicted | 102 | 106 | 107 | .2140 | .2477 | .7365 |
| FEV1%predicted† | 104 (100) | 100 (95) | 94 (95) | .4391 | .0195 | .0196 |
| FEF25–75%predicted† | 100 (100) | 92 (96) | 74 (36) | .1218 | .0001 | <.0001 |
| FEV1/FVC, %† | 89 (93) | 87 (79) | 79 (39) | .2102 | <.0001 | <.0001 |
| BDR, %† | 1.6 (100) | 3.2 (95) | 6.4 (64) | .3145 | .0046 | .0009 |
Spirometry measurements are presented as median.
†
Percentage of patients with the spirometry parameter in normal range are presented in parentheses. FEV1%predicted lower than 80% of predicted, FEF25–75%predicted lower than 65% predicted, FEV1/FVC lower than 80%, or BDR higher than 10% are considered as abnormal.
*
Mann-Whitney U Test was applied to detect the group difference between healthy (H) vs. controlled asthma (C), healthy vs. uncontrolled asthma (U) and controlled asthma vs. uncontrolled asthma.