Clinically important variables and outcomes*
| Variable | No. (%)† of patients n = 139 |
|---|---|
| Predictor variables | |
| Median age, yr (IQR) | 83 (76–89) |
| Female | 74 (53) |
| Clear history of head injury | 103 (74) |
| Unclear history of head injury | 23 (17) |
| Clear history of loss of consciousness | 29 (21) |
| Unclear history of loss of consciousness | 53 (38) |
| Clear history of new amnesia about events of fall | 42 (30) |
| Unclear history of amnesia | 46 (33) |
| History of previous major bleed | 3 (2) |
| Previous stroke or transient ischemic attack | 30 (22) |
| Renal impairment | 30 (22) |
| Cirrhosis | 1 (1) |
| Takes anticoagulation medication | 38 (27) |
| Warfarin | 6 (4) |
| Rivaroxaban | 8 (6) |
| Apixaban | 19 (14) |
| Dabigatran | 2 (1) |
| Enoxaparin | 1 (1) |
| Anticoagulant name not documented | 2 (1) |
| Takes antiplatelet medication | 58 (42) |
| ASA | 38 (27) |
| Clopidogrel | 6 (4) |
| ASA and clopidogrel | 6 (4) |
| Antiplatelet name not documented | 8 (6) |
| Clinical Frailty Scale score | |
| 1 Very fit | 2 (1) |
| 2 Well | 11 (8) |
| 3 Managing | 30 (22) |
| 4 Very mild frailty | 23 (17) |
| 5 Mildly frail | 22 (16) |
| 6 Moderately frail | 29 (21) |
| 7–8 Severely or very severely frail | 19 (14) |
| 9 Terminally ill | 3 (2) |
| Reduced Glasgow Coma Scale score from baseline | 32 (23) |
| Bruise or laceration on the head | 84 (60) |
| New abnormality on neurologic examination | 35 (25) |
| Median hemoglobin, g/L (IQR) | 125 (113–139) |
| Median platelet count × 109/L (IQR) | 215 (166–257) |
| Outcomes | |
| Bleed site | |
| Epidural bleed | 1 (1) |
| Subdural bleed | 44 (32) |
| Subarachnoid bleed | 17 (12) |
| Intraparenchymal bleed | 20 (14) |
| Intraventricular bleed | 5 (4) |
| Multicompartment bleed | 52 (37) |
| Neurosurgical intervention | 8 (6) |
| Intensive care admission | 12 (9) |
| Median hospital length of stay, days (IQR) | 3 (1–12) |
| 90-day mortality | 29 (21) |