Table 1.
Baseline characteristics of IPF patients (n = 832).
| Variable | |
|---|---|
| Age at diagnosis, yr | 66.4 ± 9.3 |
| Gender (F:M) | 233 (28.0): 599 (72.0) |
| Duration of symptoms at diagnosis (month) | 11.2 ± 20.9 |
| Dyspnea of exertion(%) | 566 (68.0) |
| Cough (%) | 485 (58.3) |
| Sputum (%) | 262 (31.5) |
| Hemoptysis (% | 18 (2.2) |
| Chest pain (% | 50 (6.0) |
| Asymptom (%) | 40 (4.8) |
| *Smoking (%) | |
| Nonsmoker | 280 (36.4) |
| Former | 286 (37.2) |
| Current | 203 (26.4) |
| Smoking duration (year) | 35.6 ± 12.7 |
| Smoking amounts (pack-year) | 34.8 ± 20.0 |
| Diagnostic method (%) | |
| Clinical-radiographic | 452 (54.3) |
| Surgical | 380 (45.7) |
| Outcome (%) | |
| Alive | 559 (67.2) |
| Dead | 273 (32.8) |
| CPI | 38.6 ± 15.5 |
| GAP stage (I/II/III) | 536 (64.4)/268 (32.2)/28 (3.4) |
Note: Values in parentheses are percentages.
*Smoking status were available for 769 patients.
CPI = 91.0 − (0.65 * DLCO [%]) − (0.53 * FVC [%]) + (0.34 * FEV1 [%]).
ANA, antinuclear antibody; CPI, composite physiologic score; CRP, C-reactive protein; DLCO, diffusing capacity of the lung for carbon monoxide; FEV1, forced expiratory volume; FVC, forced vital capacity; GAP, (G, 0–1 point), age (A, 0–2 points), and 2 lung physiology variables (P, FVC and DLCO); RF, rheumatoid factor.