Table 2.
Characteristics at admissions.
| Characteristics | Total (N = 1855) | Age (year) | P value* | |
|---|---|---|---|---|
| <65 (N = 999) | ≥65 (N = 856) | |||
| Source of admission (%) | ||||
| Emergency | 1059 (57.1) | 576 (57.7) | 483 (56.4) | 0.301 |
| Ward | 751 (40.5) | 394 (39.4) | 357 (41.7) | |
| Other | 45 (2.43) | 29 (2.9) | 16 (1.9) | |
| Investigations | ||||
| Hemoglobin (g/dL) | 11.6 (9.4–13.5) | 11.8 (9.5–13.8) | 11.3 (9.4–13.2) | 0.028 |
| Platelets/mm3 | 249 (159–345) | 246 (143–345) | 252 (174.5–344.5) | 0.455 |
| White blood cells/mm3 | 12.1 (8.1–17.1) | 11.9 (7.8–17.3) | 12.3 (8.4–17.1) | 0.402 |
| BUN (mmol/L) | 8.1 (4.9–14.9) | 6.8 (4.3–13.5) | 9.8 (5.9–15.7) | <0.001 |
| Creatinine (µmol/L) | 104 (68–211) | 95 (65–206) | 120 (74–217.5) | <0.001 |
| MPM II score | 28 (14–45) | 19 (9–34) | 35 (24–54) | <0.001 |
| LOS (ICU) | 3 (2–6) | 3 (2–6) | 3 (2–5) | 1.000 |
| LOS (hospital) | 12 (6–23) | 12 (6–23) | 12 (6–23) | 1.000 |
| Reintubation (%) | 93 (8.0) | 41 (7.6) | 52 (8.4) | 0.658 |
| Duration from extubation to discharge | 33 (25–76) | 31 (25–74) | 34 (26–78) | 0.372 |
| Preexisting kidney disease (%) | 397 (21.5) | 152 (15.3) | 245 (28.6) | <0.001 |
BUN: blood urea nitrogen; MPM: mortality prediction model; LOS: length of stay; *data provided as number (percentage) and median (interquartile range); significance tests were carried out, accounting for multiple admissions per subject.