Table 1.
Characteristics of overall cohort (N = 55)
| Age, mean (SD) | 69.4 (13.6) |
| Admission APACHE II score, mean (SD) | 9.7 (6) |
| Admission GCS, mean (SD) | 14.1 (2.35) |
| Functional impairment at baseline, N (%) | 16 (29%) |
| Premorbid anticoagulant use, N (%) | 12 (22%) |
| Premorbid antiplatelet use, N (%) | 15 (27%) |
| Pure acute subdural hematoma, N (%) | 21 (38%) |
| Associated contusions, N (%) | 4 (7%) |
| Aphasia, N (%) | 3 (5%) |
| Underwent operation, N (%) | 41 (75%) |
| Developed seizures, N (%) | 7 (13%) |
| Developed delirium, N (%) | 19 (35%) |
| Delirium subtypea | |
| Hypoactive, N (%) | 14 (74%) |
| Hyperactive, N (%) | 1 (5%) |
| Mixed, N (%) | 4 (21%) |
APACHE II acute physiology and chronic health evaluation II; GCS glasgow coma score; SD standard deviation
a
Hypoactive delirium is defined as having RASS scores that were ≤ 0, hyperactive delirium is defined as having RASS scores > 0, and mixed is defined as patients with both positive and negative RASS scores