Table 2: Pre-admission characteristics.
| All patients | 18-59 years (n = 377) | 60 years and above (n = 484) | |||
| N = 861 | Medical n = 217 | Surgical n = 160 | Medical n = 320 | Surgical n = 164 | |
| Males n (%) | 567 (66%) | 145 (67%) | 121 (75%) | 121 (75%) | 199 (62%) |
| Charlson comorbidity index, mean ± SD | 2.3 ± 2.2 | 2.0 ± 2.2 | 0.7 ± 1.3* | 3.0 ± 2.2 | 2.7 ± 2.1 |
| Chronic disease n (%) | |||||
| Known chronic disease | 672 (78%) | 157 (72%) | 69 (43%)* | 298 (93%) | 148 (90%) |
| No prior chronic disease | 189 (22%) | 60 (28%) | 91 (57%)* | 22 (7%) | 16 (10%) |
| Common chronic disease categories¹ | |||||
| Cardiovascular disease n (%) | 343 (40%) | 45 (21%) | 21 (13%) | 195 (61%) | 82 (50%) |
| Chronic pulmonary disease n (%) | 167 (20%) | 24 (11%) | 9 (6%) | 101 (32%) | 33 (21%) |
| Diabetes n (%) | 136 (16%) | 29 (13%) | 4 (3%) | 70 (22%) | 33 (20%) |
| Polyfarmacy, regular medication n (%) | |||||
| None | 213 (25%) | 70 (32%) | 97 (61%)* | 27 (9%) | 19 (12%) |
| 1-4 | 358 (42%) | 93 (43%) | 49 (31%) | 113 (35%) | 102 (62%) |
| 5-7 | 145 (17%) | 26 (12%) | 8 (5%) | 85 (27%) | 26 (16%) |
| ≥ 8 | 145 (17%) | 28 (13%) | 6 (4%) | 94 (29%) | 17 (10%) |
| Living situation n (%) | |||||
| Home without home care | 679 (79%) | 178 (82%) | 143 (89%)* | 221 (69%) | 137 (84%)* |
| Home with home care | 90 (10%) | 13 (6%) | 2 (1%) | 63 (20%) | 12 (7%) |
| Nursing home or institution | 50 (6%) | 6 (3%) | 0 (0%) | 30 (9%) | 14 (9%) |
| Homeless | 11 (1%) | 6 (3%) | 4 (2%) | 1 (0.3%) | 0 |
| Other² | 24 (3%) | 11 (5%) | 8 (6%) | 4 (1%) | 0 |
| Unknown | 8 (1%) | 3 (1%) | 3 (2%) | 1 (0.3%) | 1 (0.6%) |