Table 1.
Baseline characteristics for interstitial lung disease cases with and without mention of interstitial lung disease features on chest radiography
| Characteristic | Patients with ILD (n = 180) | ILD Features Mentioned (n = 114) | ILD Features not Mentioned (n = 66) | P Value |
|---|---|---|---|---|
| Age (yr), mean (±SD) | 69.7 (11.4) | 70.9 (10.2) | 67.7 (13.1) | 0.073 |
| Male sex, n (%) | 108 (60.0) | 70 (61.4) | 38 (57.6) | 0.61 |
| Race/ethnicity, n (%) | — | — | — | 0.65 |
| White | 130 (72.2) | 81 (71.1) | 49 (74.2) | — |
| Black | 10 (5.6) | 5 (4.4) | 5 (7.6) | — |
| Asian | 19 (10.6) | 14 (12.3) | 5 (7.6) | — |
| Hispanic | 19 (10.6) | 12 (10.5) | 7 (10.6) | — |
| Other/unknown | 2 (1.1) | 2 (1.8) | 0 (0) | — |
| Ever-smoker, n (%) | 108 (60.0) | 70 (61.4) | 38 (57.6) | 0.64 |
| Radiograph interpreted by chest radiologist, n (%) | 88 (48.9) | 56 (49.1) | 32 (48.5) | 0.93 |
| ILD classification, n (%) | — | — | — | 0.76 |
| IPF | 64 (35.6) | 43 (37.7) | 21 (31.8) | — |
| CTD-ILD | 46 (25.6) | 28 (24.6) | 18 (27.3) | — |
| uILD | 40 (22.2) | 25 (21.9) | 15 (22.7) | — |
| CHP | 23 (12.8) | 15 (13.2) | 8 (12.1) | — |
| Other non-IPF IIP | 7 (3.9) | 3 (2.6) | 4 (6.1) | — |
| Pulmonary function, mean (±SD) | — | — | — | — |
| FVC% predicted | 80.5 (18.5) | 79.9 (17.2) | 81.4 (20.6) | 0.61 |
| DLCO% predicted | 54.9 (16.6) | 53.2 (15.1) | 57.7 (18.5) | 0.085 |
Definition of abbreviations: CHP = chronic hypersensitivity pneumonitis; CTD-ILD = connective tissue disease-associated interstitial lung disease; DLCO = diffusion capacity of the lung for carbon monoxide; FVC = forced vital capacity; ILD = interstitial lung disease; IIP = idiopathic interstitial pneumonia; IPF = idiopathic pulmonary fibrosis; SD = standard deviation; uILD = unclassifiable interstitial lung disease.