Table 6.
Characteristics of patients with IPF stratified by CPB stage in the derivation cohort.
| Characteristics | Stage I | Stage II | Stage III | p |
|---|---|---|---|---|
| Age (years) | 67.27 ± 6.31 | 68.19 ± 8.53 | 61.13 ± 9.54 | <0.0001 |
| Males | 39 (95.12) | 70 (79.55) | 31 (77.50) | 0.054 |
| Smoking | ||||
| Never smoker | 12 (33.33) | 28 (34.15) | 8 (21.05) | 0.019 |
| Current smoker | 6 (16.67) | 9 (10.98) | 14 (36.84) | . |
| Ever smoker | 18 (50.00) | 45 (54.88) | 16 (42.11) | . |
| FEV1, % predicted | 93.87 ± 16.61 | 80.66 ± 16.48 | 69.99 ± 20.01 | <0.0001 |
| FVC, % predicted | 90.39 ± 16.73 | 77.26 ± 16.74 | 66.19 ± 19.79 | <0.0001 |
| FEV1/FVC, % | 81.11 ± 5.21 | 81.68 ± 6.66 | 85.46 ± 6.65 | 0.0003 |
| DLCO, % predicted | 52.49 ± 18.69 | 33.57 ± 13.52 | 29.55 ± 14.50 | <0.0001 |
Data were expressed as median (interquartile range) or count (percentage) where appropriate. P-value was calculated by the Wilcoxon rank-sum test.