Table 1. Demographic, clinical, and physiologic characteristics of patients with idiopathic pulmonary fibrosis.
| Characteristics | N | Value |
|---|---|---|
| Age, years | 52 | 75 (66–79) |
| Male/Female | 52 | 44 (84.6%)/8 (15.4%) |
| BMI, kg/m2 | 52 | 22.7 (18.5–25.9) |
| Smoking history (current or past/never) | 51 | 46 (90.2%)/5 (9.8%) |
| Pack-years | 51 | 42.0 (19.5–61.5) |
| FVC %pred., % | 45 | 83.6 (61.2–90.7) |
| FEV1%pred., % | 45 | 80.2 (65.4–91.7) |
| FEV1/FVC, % | 45 | 82.8 (76.1–86.8) |
| DLCO %pred., % | 37* | 62.5 (51.5–76.7) |
| CPI | 37 | 33.6 (27.2–42.2) |
| KL-6, U/ml | 42 | 821 (626–1315) |
| GAP stage (I/II/III) | 39 | 20/14/5 |
| Anti-fibrotic drug (use or non-use) | 52 | 6 (11.5%)/46 (88.5%) |
| Follow-up period, years | 52 | 3.4 (1.2–4.2) |
Data are presented as number or median and interquartile range.
BMI = body mass index; FVC = forced vital capacity; FEV1 = forced expiratory volume in 1 s; DLCO = diffusing capacity of the lungs for carbon monoxide; CPI = composite physiologic index; KL-6 = Krebs von den Lungen-6; GAP = gender, age, and physiology.
*: two patients were not able to perform DLCO. Six patients did not have DLCO data.