Table 2.
Pulmonary function tests of included studies.
| Frija-Masson et al, (n = 50) | Huang et al, (n = 57) | Li et al, (n = 18) | Liu et al, (n = 72) | Mo et al, (n = 110) | You et al, (n = 18) | Zhao et al, (n = 55) | |
|---|---|---|---|---|---|---|---|
| Spirometry | |||||||
| FVC, L | NR | NR | NR | 1.78 ± 0.58 | NR | NR | NR |
| FVC, % of predicted | 93 (85−99) | 101 ± 15.9 | 91.5 ± 17.3 | NR | 93.6 ± 12.3 | 105.1 ± 23.3 | NR |
| FEV1, L | NR | NR | NR | 1.11 ± 0.11 | NR | NR | NR |
| FEV1, % of predicted | 93 (83−100) | 97.9 ± 14.9 | 89.4 ± 15.7 | NR | 92.7 ± 11.6 | 101 ± 19.5 | NR |
| FEV1/FVC | 0.81 (0.75−0.87) | 81.2 ± 6.1 | 80.5 ± 7.0 | 60.5 ± 6.2 | 80.7 ± 5.8 | 77.9 ± 8.1 | NR |
| Lung volumes | |||||||
| TLC, % of predicted | 91.5 (81−103) | 93.9 ± 12.8 | NR | NR | 86.3 ± 11.3 | NR | NR |
| Diffusion capacity | |||||||
| DLCO, % of predicted | 80 (70−92) | 78.4 ± 13.6 | NR | 60.5 ± 11.7 | 78.2 ± 14.3 | NR | NR |
| DLCO/VA, % of predicted | 94 (78−108) | NR | NR | NR | 92.1 ± 16.7 | NR | NR |
| PFT Interpretation | |||||||
| Restrictive, n (%) | 13 (26) | 7 (12.3)## | 5 (27.7) | NR | 10 (9.09)# | 3 (16.7)# | 6 (10.9) |
| 27 (25)## | 4 (7.3) | ||||||
| Obstructive, n (%) | 2 (4) | 6 (10.5) | 1 (5.5) | NR | 5 (4.55)* | 3 (16.7)* | NR |
| Altered difusion, n (%) | 22 (44) | 30 (52.6)** | NR | NR | 51 (47.22)** | NR | 9 (16.4)** |
| Time of assessment | 30 days after symptoms onset | 30 days after discharge from the hospital | Near to discharge and two weeks after | NR | 27.9 ± 7 days after the onset of disease | 38 ± 13.4 days after hospital discharge | 3 months after hospital discharge |
Abbreviations: DLCO: Diffusion capacity of the lungs for carbon monoxide; FVC: Forced vital capacity; FEV1: Forced expiratory volume in the first second; NR: Not reported; TLC: Total lung capacity. Data are shown as Mean ± SD, Median (Inter-quartile range), n (%).
#Author reported values lower 80% predicted FVC.
##Author reported values lower 80% predicted TLC.
*Author reported values lower 70% predicted FEV1/FVC.
**Author reported values lower 80% predicted DLCO.