Table 1. Clinical characteristics and physiology of patients.
| Variable | Controls (No. = 17) |
IPF (No. = 23) |
COPD (No. = 30) |
|---|---|---|---|
| Age (years)a | 60.6 ± 7.3 | 67.6 ± 8.7 | 59.7 ± 6.9 |
| Gender male (%, No.) | 52.9 (9) | 56.5 (13) | 73.3 (22) |
| Body Mass Index (kg/m2)a | 27.3 ± 3.3 | 27.7 ± 4.5 | 25.8 ± 5.7 |
| Smoking history | |||
| Ever smoked (%, No.) | 58.8 (10) | 52.2 (12) | 56.7 (17) |
| Pack-yearsa | 32.4 ± 10.3 | 30.3 ± 12.1 | 33.5 ± 14.6 |
| SpO2a | 98.4 ± 4.1 | 92.4 ± 4.1 | 93.6 ± 3.7 |
| Pulmonary function | |||
| FVC (% pred)a | 96.0 ± 7.3 | 71.3 ± 16.4 | 48.8 ± 15.1 |
| FEV1 (% pred)a | 95.0 ± 8.0 | 75.0 ± 15.9 | 23.7 ± 5.2 |
| FEV1/FVC (%)a | 97.6 ± 1.1 | 84.1 ± 5.5 | 38.2 ± 10.0 |
| DLco(% pred)a | - | 44.1 ± 13.9 | 54.2 ± 7.8 |
| Disease duration (years)a | NA | 3.9 ± 3.1 | 10.1 ± 2.0 |
| Disease severity | NA |
GAP indexb 4 [3, 5] |
Airflow severity GOLD 4 |
a Results are presented as mean ± standard deviation.
b Results are presented as median and interquartile range.
NA: Not Applicable; SpO2: peripheral oxygen saturation; FVC: forced vital capacity; FEV1: forced expiratory volume in one second; DLco: diffusing capacity of lung for carbon monoxide; GAP: Gender, Age, PhysiologyIndex; GOLD: the global initiative for chronic obstructive lung disease guidelines.