| Aetiology | Number |
| Infection, including pneumonia | 61 |
| Cardiac conditions (acute coronary syndrome, congestive heart failure) | 49 |
| Respiratory failure, including chronic obstructive pulmonary disease | 26 |
| Stroke | 18 |
| Renal failure | 9 |
| Gastrointestinal complication (bleed, obstruction, perforation, ischaemia) | 8 |
| Malignancy | 7 |
| Pulmonary embolus | 6 |
| Trauma | 4 |
| Liver failure | 4 |
| Miscellaneous | 5 |
| Unknown | 3 |