Predictors of long-term mortality—univariate regression analysis
| Risk factor | n | HR | 95% CI | P value | |
| Age | Under 20 | 20 | – | ||
| (reference <20 years) | 20–29 | 72 | 1.6 | 0.2 to 13.1 | 0.674 |
| 30–39 | 131 | 2.9 | 0.4 to 21.8 | 0.296 | |
| 40–49 | 175 | 3.9 | 0.5 to 28.5 | 0.180 | |
| 50–59 | 206 | 5.0 | 0.7 to 36.5 | 0.110 | |
| 60–69 | 218 | 7.9 | 1.1 to 57.0 | 0.040 | |
| 70–79 | 221 | 8.7 | 1.2 to 62.4 | 0.032 | |
| 80+ | 113 | 17.3 | 2.4 to 124.4 | 0.005 | |
| Gender | Male | 650 | – | ||
| (reference male) | Female | 506 | 1.2 | 1.0 to 1.5 | 0.049 |
| Charlson score | 0 | 833 | – | ||
| (reference 0) | 1 | 168 | 2.6 | 2.0 to 3.4 | <0.001 |
| 2 | 112 | 4.7 | 3.6 to 6.2 | <0.001 | |
| 3 | 31 | 3.8 | 2.4 to 6.1 | <0.001 | |
| 4 or more | 9 | 5.3 | 2.4 to 12.0 | <0.001 | |
| Number of comorbid conditions | 0 | 833 | – | ||
| (reference 0) | 1 | 262 | 3.2 | 2.6 to 4.0 | <0.001 |
| 2 | 47 | 4.5 | 3.0 to 6.7 | <0.001 | |
| 3 | 11 | 3.3 | 1.5 to 7.5 | 0.004 | |
| Length of stay | Less than 20 days | 1079 | – | ||
| (reference <20 days) | Longer than 20 days | 77 | 0.4 | 0.2 to 0.8 | 0.006 |
| Level of critical care | ICU | 251 | – | ||
| (reference ICU) | HDU | 905 | 1.2 | 1.0 to 1.4 | 0.019 |
The HR, 95% CI and p value of Wald’s test are presented for each variable found to significantly affect postdischarge survival on univariate regression analysis. P<0.05 was considered significant. The reference category for each variable is appended. Age has been transformed to a categorical variable for the purposes of the analysis.
ccAP, acute pancreatitis requiring critical care admission; HDU, high-dependency unit; ICU, intensive care unit; n, number of patients per category.