Relationship of flow-volume curve pattern on pulmonary function test with clinical and radiological features in idiopathic pulmonary fibrosis

Table 1 Demographic, Clinical, and Physiologic Characteristics of Patients with Idiopathic Pulmonary Fibrosis

Characteristics	N	Value
Age, years	130	71 (65–76)
Gender (Male/Female)	130	104 (80.0%)/26 (20.0%)
BMI, kg/m²	130	23.1 (20.7–25.9)
Smoking history (current or past/never)	130	102 (78.5%)/28 (21.5%)
Pack-years	130	30 (2–46)
FVC %pred., %	130	76.2 (63.9–89.1)
FEV₁%pred., %	130	76.3 (65.8–90.2)
FEV₁/FVC, %	130	83.0 (76.8–87.8)
DL_CO %pred., %	124	70.1 (50.8–85.7)
CPI	124	31.3 (18.2–45.4)
KL-6, U/ml	129	956 (623–1506)
GAP stage (I/II/III)	124	71 (57.3%)/50 (40.3%)/3 (2.4%)
Follow-up period, years	130	3.0 (1.4–3.8)

Data are presented as number or median (interquartile range)
BMI body mass index, FVC forced vital capacity, FEV₁ forced expiratory volume in 1 s; DL_CO, diffusing capacity of the lungs for carbon monoxide, CPI composite physiologic index, KL-6 Krebs von den Lungen-6, GAP gender, age, and physiology

ISSN: 1471-2466