| | Variable name | Overall n = 14,265 (100%) | Daytime hours (08:00–16:59) n = 4,352 (30.5%) | Nighttime hours (17:00–07:59) n = 9,913 (69.5%) | value |
| | Age at admission, years, mean (SD) | 63.74 (17.07) | 63.35 (17.22) | 63.91 (17.00) | 0.076 | | Gender, male sex, n (%) | 8,061 (56.5%) | 2,419 (55.6%) | 5,642 (56.9%) | 0.140 | | Previous location before first ICU, n (%) | | | | | | Direct admission (home) | 2,284 (16.0) | 914 (21.0) | 1,370 (13.8) | <0.001 | | Emergency department | 6,765 (47.4) | 2,113 (48.6) | 4,652 (46.9) | 0.074 | | Surgical ward | 952 (6.7) | 63 (1.4) | 889 (9.0) | <0.001 | | Medical ward | 4,264 (29.9) | 1,262 (29.0) | 3,002 (30.3) | 0.123 | | Transfer from other institutions, n (%) | 4875 (34.2) | 1622 (37.3) | 3253 (32.8) | <0.001 | | Elixhauser comorbidities, n (%) | | | | | | Congestive heart failure | 1,805 (12.7) | 566 (13.0) | 1,239 (12.5) | 0.402 | | Arrhythmia | 2,377 (16.7) | 713 (16.4) | 1,664 (16.8) | 0.552 | | Valvular disease | 330 (2.3) | 123 (2.8) | 207 (2.1) | 0.007 | | Peripheral vascular disease | 1,104 (7.7) | 218 (5.0) | 886 (8.9) | <0.001 | | Hypertension, total | 4,357 (30.5) | 1,345 (30.9) | 3,012 (30.4) | 0.534 | | Chronic obstructive pulmonary disease | 1,470 (10.3) | 485 (11.1) | 985 (9.9) | 0.029 | | Diabetes mellitus, total | 4,239 (29.7) | 1,316 (30.2) | 2,923 (29.5) | 0.365 | | Renal failure | 713 (5.0) | 232 (5.3) | 481 (4.9) | 0.227 | | Liver disease | 610 (4.3) | 164 (3.8) | 446 (4.5) | 0.047 | | Metastatic cancer | 854 (6.0) | 253 (5.8) | 601 (6.1) | 0.563 | | Haematological malignancy | 334 (2.3) | 113 (2.6) | 221 (2.2) | 0.182 | | Elixhauser comorbidity score, mean (SD) | 5.35 (6.3) | 5.2 (6.1) | 5.3 (6.3) | 0.223 | | Average MODS, mean (SD) | 3.9 (2.9) | 4.0 (3.0) | 3.8 (2.9) | 0.046 | | Most responsible diagnosis (ICD diagnosis), n (%) | | | | | | Diseases of the respiratory system | 1,558 (10.9) | 539 (12.4) | 1,019 (10.3) | <0.001 | | Diseases of the circulatory system | 4,753 (33.3) | 1,482 (34.1) | 3,271 (33.0) | 0.218 | | Diseases of the nervous system | 391 (2.7) | 133 (3.1) | 258 (2.6) | 0.127 | | Mental and behavioural disorders | 98 (0.7) | 21 (0.5) | 77 (0.8) | 0.050 | | Injury, poisoning, and other external causes | 1,863 (13.1) | 584 (13.4) | 1,279 (12.9) | 0.399 | | Other | 5,602 (39.3) | 1,593 (36.6) | 4,009 (40.4) | <0.001 |
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