Table 1.
Clinical characteristics of the study subjects.
| All | German | Japanese | p Value | Missing Values | |
|---|---|---|---|---|---|
| Number of the subjects | 121 | 54 | 67 | ||
| Age (years) | 68.5 ±7.6 | 68.1 ± 7.6 | 68.9 ± 7.5 | NS | 0 |
| Gender (male/female) | 98/23 | 41/13 | 57/10 | NS | 0 |
| Smoking (Cu or Ex/Non) | 86/30 | 33/16 | 53/14 | NS | 5(4.1%) |
| VC (percent predicted) | 75.0 ± 16.5 | 74.7 ±14.9 | 75.3 ± 18.1 | NS | 0 |
| DLCO (percent predicted) | 45.5 ± 15.5 | 45.8 ±17.3 | 45.4 ± 14.2 | NS | 6(5.0%) |
| Use of corticosteroid (yes/no) | 57/64 | 41/13 | 16/51 | <0.01 | 0 |
| Use of immunosuppressive agent (yes/no) | 30/91 | 27/27 | 3/64 | <0.01 | 0 |
Data are shown as mean ± SEM. IPF, idiopathic pulmonary fibrosis: Cu, current smoker; Ex, ex-smoker; Non, non-smoker; VC, vital capacity; DLCO, diffusing capacity of the lung for carbon monoxide; NS, not significant.