Table 1.
Participant characteristics. data calculated from 2618 participants enrolled in the chest CT substudy with ILA measures
| Demographics | Mean (SD) or % |
|---|---|
| Age (years) | 59.5 (11.9) |
| Male sex (%) | 49.6 |
| Body mass index (kg/m2) | 28.5 (5.4) |
| Smoking status (%) | |
| Never | 48.2 |
| Former | 44.2 |
| Current | 7.2 |
| Pack-years | 9.9 (16.0) |
| Former smokers | 17.1 (17.2) |
| Current smokers | 32.8 (15.2) |
| Smoker In household In adulthood (%) | 25.8 |
| Primary occupation (%) | |
| Labour | 7.6 |
| Sales/Homemaker | 25.9 |
| Professional | 40.6 |
| Other/Unspecified | 25.8 |
| Education (%) | |
| High school or less | 21.6 |
| Some college | 31.4 |
| College grade | 46.8 |
| Median value of owner-occupied housing in census block group (year 2000 $) | 223 000 (111 000) |
| ILA on chest CT (among 2618 with chest CT) | |
| ILA | 6.7 |
| No ILA | 52.0 |
| Indeterminate | 41.3 |
| ILA progression (among 1846 with chest and cardiac CT) | |
| ILA progression | 6.4 |
| Stable/Improved ILA | 2.0 |
| No ILA on either CT | 35.0 |
| Indeterminate | 56.7 |
ILA, interstitial lung abnormalities.