| Variables | Univariate analysis | Stepwise multivariate analysis | ||
| Hazard ratio (95% CI) | p Value | Hazard ratio (95% CI) | p Value | |
| Age (>65 years) | 0.95 (0.40 to 2.30) | 0.916 | ||
| Sex (male) | 2.57 (0.59 to 11.1) | 0.208 | ||
| Obstructive jaundice | 2.20 (0.85 to 5.75) | 0.106 | 3.09 (1.14–8.32) | 0.026 |
| Abdominal pain | 1.00 (0.40 to 2.51) | 0.998 | ||
| Diffuse pancreatic ductal change | 1.17 (0.49 to 2.84) | 0.723 | ||
| IgG4 (>420 mg/dl) | 0.46 (0.14 to 1.52) | 0.201 | ||
| CST | 0.47 (0.18 to 1.22) | 0.120 | 0.33 (0.12–0.89) | 0.029 |
CI, Confidence interval; CST, corticosteroid treatment.