Table 3.
Multivariate Cox regression analysis including serum ferritin*
| Variables | HR (95% CI) | P‐value |
|---|---|---|
| Age, years | 0·990 (0·953–1·028 | 0·597 |
| Sex | 0·648 (0·253–1·657) | 0·365 |
| RP‐ILD | 2·609 (1·060–6·425) | < 0·05 |
| CAM | 12·665 (3·134–51·186) | < 0·001 |
| Anti‐MDA5 antibody | 4·349 (1·447–13·069) | < 0·01 |
| Anti‐TIF1‐γ antibody | 3·888 (1·023–14·781) | < 0·05 |
| Ferritin > 306·8 ng/ml | 3·433 (1·128–10·449) | < 0·05 |
| Neopterin > 22·1 nmol/l | 4·84 (1·642–14·263) | < 0·01 |
*
Analysis performed in 99 patients. HR = hazard ratio; CI = confidence interval; RP‐ILD = rapidly progressive interstitial lung disease; CAM = cancer‐associated myositis; MDA5 = melanoma differentiation‐associated gene; TIF1 = transcriptional intermediary factor.