Table 1.
Demographics of patients included in study
| All | No delirium | Delirium | P value | |
| Age (mean, SD) | 80.3 (8.2) | 79.6 (8.2) | 82.9 (8.1) | <0.001 |
| Gender (% female) | 53.8% (337) | 54.9% (271) | 50.0% (66) | 0.320 |
| Dementia (known/probable %) | 20.2% (126) | 14.4% (71) | 41.7% (55) | <0.001 |
| Clinical frailty scale | ||||
| 1–3 | 29.6% (185) | 34.9% (172) | 9.8% (13) | <0.001 |
| 4–6 | 53.0% (331) | 52.1% (257) | 56.1% (74) | |
| 7–9 | 17.4% (109) | 13.0% (64) | 34.1% (45) | |
| Specialty | ||||
| Acute medicine | 19.5% (122) | 19.0% (94) | 21.2% (28) | <0.001 |
| Geriatric medicine | 25.7% (161) | 20.4% (101) | 45.5% (60) | |
| Stroke | 4.3% (27) | 5.3% (26) | 0.8% (1) | |
| Other medicine | 27.5% (172) | 29.1% (144) | 21.2% (28) | |
| Other surgery | 6.7% (42) | 8.3% (41) | 0.8% (1) | |
| General surgery | 7.7% (48) | 8.5% (42) | 4.5% (6) | |
| Orthopaedic surgery | 8.6% (54) | 9.3% (46) | 6.1% (8) | |
Patients with delirium were older, more likely to have dementia, and more likely to be frail compared with those without delirium. The prevalence of delirium in patients admitted other surgical specialties other than general or orthopaedic was lower than across other specialties.