Table 1.
Demographic and clinical characteristics of the 436 patients with ILD included in this study.
| Characteristic | Whole Cohort of ILD Patients (n = 436) |
IIP Patients (n = 244) |
Non-IIP Patients (n = 192) |
|---|---|---|---|
| Sex (men/women), n (%) | 294/142 (67.4/32.6) | 190/54 (77.9/22.1) | 104/88 (54.2/45.8) |
| Age at the time of the study (years), mean ± SD | 61.1 ± 10.2 | 62.8 ± 9.4 | 59.0 ± 10.8 |
| Smoking history, n (%) | 294 (69.2) | 178 (74.2) | 116 (62.7) |
| Packs of cigarettes per year, mean ± SD | 30.7 ± 20.2 | 33.8 ± 20.7 | 25.8 ± 18.5 |
| Pulmonary function tests | |||
| FVC (% predicted), mean ± SD | 76.8 ± 24.1 | 73.0 ± 22.7 | 81.7 ± 25.0 |
| FEV1 (% predicted), mean ± SD | 73.7 ± 23.6 | 72.8 ± 22.4 | 74.8 ± 25.0 |
| DLCO (% predicted), mean ± SD | 36.4 ± 15.7 | 35.2 ± 15.0 | 37.9 ± 16.6 |
DLCO: Diffusing capacity of the lungs for carbon monoxide; FEV1: Forced expiratory volume in one second; FVC: Forced vital capacity; IIP: Idiopathic interstitial pneumonia; ILD: Interstitial lung disease; SD: Standard deviation.