Table 1.
Patient Characteristics (n = 52)
| Median (interquartile range) or number (%) | |
| Age, y | 73.0, (66.3-76.8) |
| Gender, male | 44 (84.6%) |
| Smoking History | 47 (90.4%) |
| BAL, performed | 22 (42.3%) |
| SLB confirmation | 7 (13.5%) |
| CPFE | 17 (32.7%) |
| %FVC, % | 86.5, (71.9-99.9) |
| %Dlco, % | 39.7, (33.0-50.0) |
| 6MWD, m | 491, (416-529) |
| Minimum SpO2 during 6MWT, % | 86.0, (80.5-89.3) |
| PaO2 on room air, Torr | 83.1, (75.7-91.5) |
| KL-6, U/mL | 784, (625-1190) |
| SP-D, ng/mL | 232, (176-232) |
| mMRC (0 to 4) | 1, (0-2) |
| HADS (0 to 21) | |
| Anxiety | 3, (1-5) |
| Depression | 4, (2-7) |
| PSQI (0 to 21) | 4, (2-8) |
Abbreviations: IPF, idiopathic pulmonary fibrosis; BAL, bron- choalveolar lavage; SLB, surgical lung biopsy; CPFE, combined pulmonary fibrosis and emphysema; %FVC, percentage of the predicted forced vital capacity; %DLCO, percentage of the predicted diffusing capacity of the lung for carbon monoxide; 6MWD, six- minute walk distance; SpO2, oxygen saturation measured by pulse oximetry; 6MWT, six-minute walk test; PaO2 partial pressure of arterial oxygen; KL-6, Krebs von den lungen-6; SP-D, surfactant protein-D; mMRC, modified Medical Research Council; HADS, Hospital Anxiety and Depression Scale; PSQI, Pittsburgh Sleep Quality Index.