Table 1.
Patient and operation characteristics
| Variable | Patient/surgical characteristics number (%) | |
|---|---|---|
| Gender | Male | 205 (54.2%) |
| Female | 173 (45.8%) | |
| ASA classification | 1 | 17 (4.5%) |
| 2 | 158 (41.8%) | |
| 3 | 153 (40.5%) | |
| 4 | 34 (8.99%) | |
| 5 | 5 (1.3%) | |
| Not recorded | 11 (2.9%) | |
| Documented respiratory disease | Asthma | 37 (9.8%) |
| COPD | 31 (8.2%) | |
| Obstructive sleep apnoea | 10 (2.6%) | |
| Other | 25 (6.6%) | |
| Documented cardiovascular disease | Hypertension | 145 (38.4%) |
| Ischaemic heart disease | 49 (13%) | |
| Atrial fibrillation | 31 (8.2%) | |
| Congestive cardiac failure | 16 (4.2%) | |
| Valvular disease | 18 (4.8%) | |
| Other | 34 (9%) | |
| National Confidential Enquiry into Patient Outcome and Death (NCEPOD) classification | Elective | 270 (71.4%) |
| Urgent/immediate/expedited | 108 (28.6%) | |
| Surgical specialty | Upper gastrointestinal/colorectal/general/breast | 111 (29.4%) |
| Urology/renal (including renal transplantation) | 34 (9%) | |
| Vascular | 37 (9.8%) | |
| Orthopaedics/spinal | 29 (7.7%) | |
| Hepatopancreaticobiliary/liver transplant (including liver transplantation) | 32 (8.5%) | |
| Ear nose and throat/maxillofacial | 17 (4.5%) | |
| Neurosurgery | 45 (11.9%) | |
| Gynaecology | 23 (6.1%) | |
| Cardiothoracic | 23 (6.1%) | |
| Plastics | 2 (0.5%) | |
| Other | 25 (6.6%) | |