Patient demographics at registry inclusion.
| Parameter* | N=277 |
| Men | 213/277 (76.9) |
| White | 255/277 (92.1) |
| Mean (SD) age, years | 69.6 (8.6) |
| Supplemental oxygen use | 29/277 (10.5) |
| Smoking status | |
| Never | 74/277 (26.7) |
| Current | 18/277 (6.5) |
| Former | 185/277 (66.8) |
| Family history of IPF | |
| Yes | 21/277 (7.6) |
| No | 208/277 (75.1) |
| Unknown | 48/277 (17.3) |
*Data presented as n/N (%) unless otherwise specified.
IPF, idiopathic pulmonary fibrosis.