Table 4.
Characteristics of subjects stratified for the presence of ILA
| Variables | Subjects with any ILA (n=129) | Subjects with no ILA (n=1,242) | P-value |
|---|---|---|---|
| Sex (n) | |||
| Female | 33 | 427 | 0.04 |
| Male | 96 | 815 | |
| Age, years (mean ± SD) | 59.8±7.6 | 59.6±7 | 0.8 |
| BMI (mean ± SD) | 25.9±3.6 | 26.3±4.2 | 0.07 |
| Smoking status (n) | |||
| Current | 109 | 791 | <0.0001 |
| Former | 20 | 433 | |
| Pack-years of smoking (mean ± SD) | 49.5±24 | 44.9±21.7 | 0.03 |
| FEV1 % (mean ± SD) | 92.8±17.8 | 94.6±18.9 | 0.3 |
| FVC% (mean ± SD) | 102.7±17.8 | 104.8±17.4 | 0.6 |
| FEV1/FVC (mean ± SD) | 71.8±12 | 72.8±12.5 | 0.7 |
Abbreviations: ILA, interstitial lung disease; BMI, body mass index; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; FEV1/FVC, Tiffenau index.