Table 2.
Variables entered into the regression model
| Abbreviated mental test score 6 |
| Age |
| ASA grade 7 |
| Cerebrovascular accident |
| Chronic obstructive pulmonary disease |
| Clips/sutures used for skin closure |
| Consultant anaesthetist |
| Consultant present at surgery |
| Date of surgery |
| Diabetes |
| Ischaemic heart disease |
| Parkinson’s disease |
| Postoperative albumin (mmol/l) |
| Preoperative creatinine (mmol/l) |
| Preoperative haemoglobin (g/dl) |
| Preoperative mobility |
| Preoperative urea (mmol/l) |
| Prosthesis |
| Revised cardiac risk index 8 |
| Sex |
| Surgeon grade |
| Time to surgery |