Table 2.
Spirometry of Patients with Follow-Up Visits at 3–12 Months and 12–24 Months
| All subjects |
Subjects with spirometry at both visits |
|||||
|---|---|---|---|---|---|---|
| 3–12 Months (n = 38) | 12–24 Months (n = 28) | Group P-value (nonpaired) | 3–12 Months (n = 20) | 12–24 Months (n = 20) | P-value (paired) | |
| FEV1 | ||||||
| Percent predicted FEV1, mean (SD) | 95.9 (16.7) | 97.4 (17.6) | 0.29 | 96.7 (18.1) | 89.7 (17.1) | 0.008 |
| FEV1 <80%, n (%) | 8 (21.0) | 6 (21.4) | — | 4 (20.0) | 5 (25.0) | — |
| FEV1/FVC | ||||||
| FEV1/FVC, mean (SD) | 81.7 (8.3) | 79.3 (7.7) | 0.24 | 83.9 (7.0) | 78.3 (7.8) | 0.01 |
| FEV1/FVC <80%, n (%) | 16 (42.1) | 14 (50.0) | — | 5 (25.0) | 10 (50.0) | — |
| FEF25–75 | ||||||
| Percent predicted FEF25–75, mean (SD) | 76.7 (25.8) | 70.5 (24.9) | 0.33 | 80.9 (23.3) | 66.2 (24.2) | 0.02 |
| FEF25–75 <70%, n (%) | 16 (42.1) | 14 (50.0) | — | 6 (30.0) | 11 (55.0) | — |
FEF25–75, forced expiratory flow between 25% and 75% of vital capacity; FEV1, forced expiratory volume in 1 s; FEV1/FVC, FEV1/forced vital capacity; ICU, intensive care unit; IQR, interquartile range.