Table 2.
Characteristics of emergency admissions for development and validation datasets
| Characteristic | Development dataset (NH) | Validation dataset (YH) | ||
| Discharged alive | Discharged died | Discharged alive | Discharged died | |
| N | 29 230 | 1766 | 24 544 | 1703 |
| Median length of stay (days) (IQR) | 4.3 (8.3) | 8.3 (13.3) | 3.9 (7.7) | 8.1 (14.1) |
| Male (%) | 14 557 (49.8) | 887 (50.2) | 11 646 (47.5) | 845 (49.6) |
| Mean NEWS (SD) | 2.1 (2.2) | 4.5 (3.2) | 2.5 (2.5) | 5.0 (3.6) |
| Alertness | ||||
| Alert (%) | 28 788 (98.5) | 1613 (91.3) | 23 953 (97.6) | 1503 (88.3) |
| Pain (%) | 80 (0.3) | 31 (1.8) | 131 (0.5) | 49 (2.9) |
| Voice (%) | 315 (1.1) | 83 (4.7) | 357 (1.5) | 106 (6.2) |
| Unconscious (%) | 47 (0.2) | 39 (2.2) | 103 (0.4) | 45 (2.6) |
| AKI score | ||||
| 0 (%) | 27 063 (92.6) | 1326 (75.1) | 22 133 (90.2) | 936 (55.0) |
| 1 (%) | 1358 (4.7) | 204 (11.6) | 1482 (6.0) | 451 (26.5) |
| 2 (%) | 429 (1.5) | 129 (7.3) | 369 (1.5) | 191 (11.2) |
| 3 (%) | 380 (1.3) | 107 (6.1) | 560 (2.3) | 125 (7.3) |
| Oxygen supplementation (%) | 5364 (18.4) | 900 (51.0) | 2549 (10.4) | 582 (34.2) |
| Mean age (years) (SD) | 66.2 (19.5) | 79.8 (11.1) | 67.5 (19.4) | 80 (11.7) |
| Mean albumin (g/L) (SD) | 33.7 (5.9) | 27.3 (6.4) | 38.2 (5.7) | 32.9 (6) |
| Mean creatinine (μmol/L) (SD) | 103.3 (78.2) | 148.9 (124.4) | 100.8 (90.6) | 138.7 (119) |
| Mean haemoglobin (g/L) (SD) | 127.8 (22.2) | 117.1 (22.8) | 125.2 (22) | 117.1 (23.2) |
| Mean potassium (mmol/L) (SD) | 4.1 (0.6) | 4.3 (0.8) | 4.3 (0.6) | 4.4 (0.8) |
| Mean sodium (mmol/L) (SD) | 137 (5.1) | 136 (7) | 136.6 (4.6) | 136.1 (6.2) |
| Mean white cell count (109 cells/L) (SD) | 9.8 (6.5) | 13.2 (13.3) | 10.2 (10.7) | 13.9 (21.1) |
| Mean urea (mmol/L) (SD) | 7.5 (5.6) | 14.1 (10.5) | 7.8 (5.6) | 13.3 (8.9) |
| Mean respiratory rate (breaths per min) (SD) | 18 (3.5) | 20.1 (4.8) | 18.6 (4.6) | 21.7 (6.8) |
| Mean temperature (°C) (SD) | 36.5 (0.7) | 36.3 (0.8) | 36.3 (0.8) | 36.1 (1.1) |
| Mean systolic pressure (mm Hg) (SD) | 129.6 (22.7) | 119.8 (24.8) | 136.1 (27.2) | 128.5 (30.3) |
| Mean diastolic pressure (mm Hg) (SD) | 75 (14.8) | 69.5 (15.8) | 75.4 (15.5) | 71.3 (17.7) |
| Mean pulse rate (beats per min) (SD) | 81.3 (17.7) | 86.5 (19.7) | 86.2 (20.9) | 92.1 (23.3) |
| Mean % oxygen saturation (SD) | 96.0 (2.9) | 94.6 (4.7) | 96.3 (2.9) | 95.0 (4.4) |
AKI, acute kidney injury; NEWS, National Early Warning Score(s); NH, Northern Lincolnshire and Goole NHS Foundation Trust Hospital; YH, York Hospital.