Cox proportional regression analysis adjusted for comorbidity, showing the relationship between mortality and explanatory variables
| Explanatory variable | HR (95% CI) | p-value |
| Sex | 0.82 (0.48–1.41) | 0.473 |
| Worsening of risk group from baseline | 1.75 (1.14–2.69) | 0.011 |
| Hypertension | 0.89 (0.51–1.56) | 0.685 |
| Diabetes mellitus type 2 | 1.01 (0.56–1.82) | 0.973 |
| Atrial fibrillation | 1.00 (0.48–2.10) | 1.000 |
| Ischaemic heart disease | 2.14 (1.21–3.78) | 0.009 |
| Stroke | 2.00 (0.85–4.74) | 0.114 |
| Obesity | 1.44 (0.78–2.66) | 0.245 |
| Kidney dysfunction | 1.85 (1.09–3.14) | 0.022 |
Worsening of risk group from baseline, ischaemic heart disease and kidney dysfunction were independent predictors of survival. Bold indicates statistical significance at p<0.05. HR: hazard ratio.