Table 2.
Medical comorbidity recorded prior to surgery, including frequency of diagnosis per patient
| Cohort 1 | Cohort 2 | |
|---|---|---|
| Chest Infection | 14 | 16 |
| Ischaemic heart disease | 6 | 30 |
| Hypertension | 6 | 18 |
| Atrial fibrillation | 7 | 8 |
| Electrolyte imbalance | 8 | 4 |
| Cardiac failure | 2 | 8 |
| Warfarin | 3 | 6 |
| Cerebrovascular disease | 2 | 7 |
| Parkinson’s disease | 0 | 7 |
| Diabetes mellitus | 2 | 3 |
| Chronic obstructive pulmonayr disease | 2 | 3 |
| Malignancy | 1 | 4 |
| Renal failure | 1 | 2 |
| Mean frequency of preoperative comorbidity per patient | 0.62 | 1.68 |
| Mean frequency of postoperative complications per patient | 0.49 | 0.75 |