Demographic details for the cohort and for patients with clinical diagnosis of delirium and dementia and ICD-10 coding status
| All n=1,281 | All delirium n=320 | Delirium coded n=111 | Delirium not coded n=209 | p valuea | All dementia n=164 | Dementia coded n=103 | Dementia not coded n=61 | p valueb | |
|---|---|---|---|---|---|---|---|---|---|
| Age, mean/SD, years | 70.0/19.2 | 81.3/11.5 | 83.1/8.2 | 80.2/12.8 | 0.04 | 84.5/8.5 | 84.5/9.0 | 84.4/7.7 | 0.91 |
| Age <65 years, n (%) | 411 (32.1) | 26 (8.1) | 2 (1.8) | 24 (11.5) | 0.01c | 2 (1.2) | 1 (1.0) | 1 (1.6) | 0.89c |
| Age 65–74 years, n (%) | 205 (16.0) | 37 (11.6) | 15 (13.8) | 22 (10.5) | 15 (9.1) | 10 (9.7) | 5 (8.2) | ||
| Age >74 years, n (%) | 665 (51.9) | 257 (80.3) | 94 (84.7) | 163 (78.0) | 147 (89.6) | 92 (89.3) | 55 (90.2) | ||
| Male, n (%) | 615 (48.0) | 130 (40.9) | 43 (39.4) | 87 (41.6) | 0.69 | 67 (40.9) | 41 (39.8) | 26 (42.6) | 0.72 |
| Dementia, n (%) | 164 (12.8) | 100 (31.1) | 38 (34.9) | 62 (29.1) | 0.29 | 164 (100) | 103 (100) | 61 (100) | n/a |
| Number of ICD-10 codes, mean/SD | 6.5/6.5 | 8.6/3.4 | 10.2/2.9 | 7.8/3.4 | <0.0001 | 8.1/3.4 | 8.7/3.1 | 7.0/3.6 | 0.002 |
| Any delirium, n (%) | 320 (24.9) | 320 (100) | 111 (100) | 209 (100) | n/a | 100 (61.0) | 65 (63.1) | 35 (57.4) | 0.47 |
| Prevalent delirium, n (%) | 260 (20.3) | 260 (80.7) | 94 (86.2) | 166 (77.9) | 0.07 | 86 (52.4) | 57 (55.3) | 29 (47.5) | 0.33 |
| Incident delirium, n (%) | 120 (9.4) | 120 (37.3) | 35 (32.1) | 85 (39.9) | 0.17 | 34 (20.7) | 24 (23.3) | 10 (16.4) | 0.29 |
| Both incident and prevalent delirium, n (%) | 60 (4.7) | 60 (18.6) | 22 (20.1) | 38 (17.8) | 0.65 | 20 (12.2) | 16 (15.5) | 4 (6.6) | 0.09 |