Table 3.
Patient characteristics and outcome for longer stay (11 days or longer) versus shorter stay admissions.
| Characteristic | Length of stay in ICU | |
|---|---|---|
| 11 days or longer | <11 days | |
| Number of admissions (%) | 78,536 (9.4) | 757,410 (90.6) |
| Age (years), mean (SD) | 60.7 (16.1) | 61.6 (18.0) |
| Gender, n (%) | ||
| Female | 31,166 (39.7) | 344,832 (45.5) |
| Male | 47,370 (60.3) | 412,578 (54.5) |
| Presence of any severe comorbidity, n (%) | 13,640 (17.5) | 133,169 (17.7) |
| Main diagnostic category, n (%) | ||
| Gastrointestinal | 17,290 (22.0) | 215,567 (28.5) |
| Respiratory | 28,990 (36.9) | 142,685 (18.8) |
| Cardiovascular | 11,053 (14.1) | 116,050 (15.3) |
| Neurological | 9199 (11.7) | 82,610 (10.9) |
| Genitourinary | 4970 (6.3) | 81,701 (10.8) |
| Haematological | 1144 (1.5) | 8275 (1.1) |
| Endocrine | 2947 (3.8) | 63,159 (8.3) |
| Musculoskeletal | 1978 (2.5) | 39,266 (5.2) |
| Dermatological | 964 (1.2) | 8068 (1.1) |
| APACHE II Acute Physiology Score, mean (SD) | 14.4 (5.8) | 11.0 (6.0) |
| APACHE II Score, mean (SD) | 18.6 (6.5) | 15.3 (6.9) |
| ICNARC Physiology Score, mean (SD) | 23.2 (8.0) | 16.1 (9.2) |
| ICNARCH-2015 predicted risk of acute hospital mortality (%) | ||
| Mean (SD) | 32.9 (24.4) | 19.5 (26.1) |
| Median (IQR) | 27.1 (12.4, 49.3) | 6.7 (1.9, 26.4) |
| ICU LOS (days) | ||
| Mean (SD) | 21.7 (15.5) | 2.7 (2.3) |
| Median (IQR) | 16.9 (13.0, 24.8) | 1.9 (0.9, 3.8) |
| Total acute hospital LOS (days) | ||
| Mean (SD) | 50.2 (46.9) | 17.3 (24.9) |
| Median (IQR) | 36 (23, 60) | 10 (5, 20) |
| Acute hospital outcome, n (%) | ||
| Alive | 55,269 (70.4) | 600,751 (79.3) |
| Dead | 23,267 (29.6) | 156,659 (20.7) |
APACHE: acute physiology and chronic health evaluation; LOS: length of stay; ICNARC: intensive care national audit & research centre; ICU: intensive care unit; IQR: interquartile range; SD: standard deviation.