Table 1 Comparison of baseline characteristics between the DP and no-DP groups among patients with IPF
Total | DP | no-DP | P-value | |
|---|---|---|---|---|
Number of patients | 188 | 43 | 145 | |
Age, year | 68.9 ± 7.7 | 71.2 ± 7.1 | 68.3 ± 7.7 | 0.025 |
Male sex | 146 (77.7) | 33 (76.7) | 113 (77.9) | 0.870 |
Ever-smoker | 144 (76.6) | 32 (74.4) | 112 (77.2) | 0.701 |
BMI, kg/m2 | 24.5 ± 3.3 | 23.3 ± 3.8 | 24.9 ± 3.1 | 0.011 |
Pulmonary function test | ||||
FVC, % predicted | 74.7 ± 17.0 | 69.1 ± 19.3 | 76.4 ± 15.9 | 0.013 |
DLco, % predicted | 58.4 ± 18.5 | 57.0 ± 21.9 | 58.8 ± 17.4 | 0.601 |
TLC, % predicted | 73.6 ± 13.6 | 70.7 ± 17.3 | 74.4 ± 12.3 | 0.196 |
6-minute walk test | ||||
Distance, m | 431.4 ± 109.9 | 377.9 ± 135.7 | 447.7 ± 95.6 | 0.005 |
Lowest SpO2, % | 89.6 ± 6.3 | 88.7 ± 6.4 | 89.8 ± 6.2 | 0.309 |
KL-6, U/mL | 1039.7 ± 823.7 | 1101.9 ± 955.2 | 1021.3 ± 783.3 | 0.574 |