Table 2.
Conventional PFT results. The table shows the data presented as mean ± SD. The p-value was calculated with the chi-squared test, Student's t-test or Mann–Whitney U as appropriate (normal distribution or not).
| NRD (n = 15) |
MI (n = 15) |
SI (n = 15) |
p-Value | |
|---|---|---|---|---|
| FVC (mL) | 3581 ± 659 | 3228 ± 715 | 2229 ± 536 | 0.00 |
| FVC (%) | 109 ± 15.3 | 96 ± 15.7 | 64.4 ± 10.8 | 0.00 |
| FEV1/FVC (%) | 78 ± 3 | 80 ± 7.7 | 78 ± 4.6 | 0.638 |
| TLC (L) | 5.4 ± 1.1 | 5.2 ± 1.1 | 3.5 ± 0.6 | 0.004 |
| TLC (%) | 105.3 ± 14.6 | 90.5 ± 11.2 | 59.9 ± 6.9 | 0.00 |
| RV (L) | 2.1 ± 0.6 | 2 ± 0.5 | 1.4 ± 0.3 | 0.030 |
| RV (%) | 111 ± 16 | 84 ± 19 | 58 ± 24 | 0.00 |
| RV/TLC (%) | 98 ± 14.6 | 93 ± 14.3 | 100 ± 22.2 | 0.371 |
| DLCO (mmol/(min kPa)) | 8.1 ± 1.5 | 6.5 ± 1.3 | 3.9 ± 1.1 | 0.00 |
| DLCO (%) | 105 ± 17 | 84.8 ± 11.8 | 48.7 ± 10.5 | 0.00 |
DLCO: diffusing capacity for carbon monoxide; FEV1: forced expiratory volume in the first second; FVC: forced vital capacity; MI: mild functional impairment; NRD: non-respiratory disease control group; RV: residual volume; SI: severe functional impairment; TLC: total lung capacity.