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. 2018 Dec 14;8(12):e023853. doi: 10.1136/bmjopen-2018-023853

Table 3.

Final model of prognostic factors of postdischarge mortality

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.