Table 3.
Risk factor | HR | 95% CI | P value |
Age* | 1.0 | 1.0 to 1.1 | <0.001 |
Charlson score | 1.5 | 1.4 to 1.7 | <0.001 |
Female gender | 1.2 | 1.0 to 1.5 | 0.058 |
Gallstone aetiology | 0.7 | 0.6 to 0.9 | 0.003 |
The HR, 95% CI and p value of Wald’s test are presented for each variable retained in the final multivariate Cox regression model. P<0.05 was considered significant.
Control variables not in the final model: renal replacement therapy, invasive ventilation, non-invasive ventilation, vasopressor use and Scottish Index of Multiple Deprivation.
*Age group as defined in table 2.