Table 1 Baseline demographic and clinical characteristics stratified by reference standard delirium status
|  | Total (N = 785) | Delirium present (N = 95) | Delirium absent (N = 690) | p value |
|---|---|---|---|---|
Age (years) | ||||
 Mean (SD) | 81.4 (6.4) | 83.5 (6.9) | 81.1 (6.3) | 0.0007 |
 Median [Q1–Q3] | 81.0 [77.0–86.0] | 84.0 [78.0–89.0] | 81.0 [77.0–86.0] | |
Gender | ||||
 Male, n (%) | 349 (44.5%) | 34 (35.8%) | 315 (45.7%) | 0.0697 |
 Female, n (%) | 436 (55.5%) | 61 (64.2%) | 375 (54.3%) | |
Dementia diagnosis and/or IQCODE ≥ 3.44 | ||||
 Yes, n (%) | 111 (14.2%) | 43 (45.3%) | 68 (9.9%) | < 0.0001 |
 No, n (%) | 673 (85.5%) | 52 (54.7%) | 621 (90.1%) | |
 Missing*, n (%) | 1 (0.1%) | 0 (0.0%) | 1 (0.1%) | |
Location of first assessment | ||||
 Emergency department, n (%) | 53 (6.8%) | 10 (10.5%) | 43 (6.2%) | 0.2624 |
 Acute general medical ward, n (%) | 665 (84.7%) | 76 (80.0%) | 589 (85.4%) | |
 Hospital ward, n (%) | 67 (8.5%) | 9 (9.5%) | 58 (8.4%) | |