A comparison of compliment cases with all chronic subdural haematoma (cSDH) cases
| Variables | Complaints (% of complaints) | All cSDH cases | |
| N | 15 | 531 | |
| Median age (IQR) | 79 (72–85) | 77 (69–84) | |
| Gender | Male | 11 (73) | 376 (71%) |
| ASA | n with ASA ≥ 3 | 7 (47) | 271 (61%) (out of those recorded) |
| Source of PALS interaction | Patient | 3 (20) | |
| Other | 12 (80) | ||
| Referred from other hospital | Yes | 10 (67) | 93% (491/530) |
| Length of stay | >10 days | 11 (73) | 137 (26%) |
| Admission to operation | >1 day | 5 (33) | 217 (40.2%) |
| Reoperation | Yes | 6 (40) | |
| Anticoagulation | Yes | 4 (27) | 9.2% (49/530) |
| Complication (AKI or MI) | Yes | 3 (20) | 44% (239) |
AKI, acute kidney injury; ASA, American Society of Anesthesiologists; MI, myocardial injury; PALS, Patient Advise and Liason Service.