Table 4.
Associated factors for AE development: univariate Cox proportional hazards models.
| Variables | Hazard ratio | 95% CI |
p Value | |
|---|---|---|---|---|
| Lower | Upper | |||
| Age, years | 1.181 | 1.050 | 1.374 | 0.0037 |
| Sex, female | 0.764 | 0.283 | 1.744 | 0.5281 |
| Smoking habit, yes | 2.336 | 0.898 | 10.33 | 0.0844 |
| CVD, RA | 2.536 | 1.006 | 11.16 | 0.0484 |
| Histology, NSIP | 0.545 | 0.203 | 1.234 | 0.1452 |
| VC, % | 0.984 | 0.942 | 1.029 | 0.4681 |
| DLco, % | 1.054 | 0.975 | 1.208 | 0.1824 |
| PaO2, Torr | 1.008 | 0.924 | 1.111 | 0.8585 |
| KL-6, U/ml | 1.000 | 0.997 | 1.000 | 0.9314 |
AE, acute exacerbation; CI, confidence interval; CVD, collagen vascular diseases; RA, rheumatoid arthritis; UIP, usual interstitial pneumonia.