| 组别 | n | FEV1 (L) | FEV1 (%) | FVC (L) |
| I组 | 38 | 1.38 ± 0.31 | 58.20 ± 10.54 | 2.11 ± 0.34 |
| II组 | 38 | 1.53 ± 0.28* | 64.09 ± 10.31* | 2.75 ± 0.43* |
| t |
| 2.214 | 2.463 | 7.197 |
| P值 |
| 0.030 | 0.016 | <0.001 |