Risk factors for AE mortality based on univariate Cox hazard analyses
| HR | 95% CI | p value | |
|---|---|---|---|
| Age ≥75 years | 1.19 | 1.05 to 1.36 | 0.008 |
| Sex, male | 1.65 | 0.37 to 7.41 | 0.51 |
| HRCT, UIP pattern | 3.82 | 0.74 to 19.8 | 0.11 |
| KL-6 ≥700 U.mL | 1.32 | 0.24 to 7.22 | 0.75 |
| LDH ≥400 IU/L | 0.40 | 0.05 to 3.32 | 0.40 |
| MMP-3 ≥200 ng/mL | 15.58 | 1.38 to 175.80 | 0.03 |
| O2 ≥3 L | 9.46 | 1.02 to 70.49 | 0.05 |
UIP, usual interstitial pneumonia; KL-6, Krebs von den Lungen-6; LDH, lactate dehydrogenase.