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. 2014 Feb 21;9(2):e89610. doi: 10.1371/journal.pone.0089610

Table 3. Hazard ratios (per unit) of prognostic factors in acute/subacute interstitial pneumonia in dermatomyositis.

Prognostic factor Hazard ratio 95% CI P-value
Ferritin 1.003 1.001–1.005 0.002
P[A-a]O2 1.045 1.017–1.085 0.017

Age- and sex-adjusted Cox regression analysis was performed to establish the prognostic factors.