Table 1 Characteristics of the study population at admission and univariate analysis according to in-hospital death
|  | Total (n = 746) | No death (n = 650) | Death (n = 96) | P-value |
|---|---|---|---|---|
Demographics | Â | Â | Â | Â |
 Age | 80.7 ± 8.1 | 80.5 ± 7.9 | 81.6 ± 9.3 | .173 |
 Female, n (%) | 490 (65.7) | 438 (67.4) | 52 (54.2) | .011 |
 Married, n (%) | 284 (38.1) | 246 (37.8) | 38 (39.6) | .744 |
Comorbidities | Â | Â | Â | Â |
 Hypertension, n (%) | 682 (78.0) | 514 (79.1) | 68 (70.8) | .069 |
 Diabetes, n (%) | 250 (33.5) | 222 (34.2) | 28 (29.2) | .334 |
 Heart failure, n (%) | 206 (27.6) | 180 (27.7) | 26 (27.1) | .901 |
 Coronary disease, n (%) | 124 (16.6) | 106 (16.3) | 18 (18.8) | .230 |
 Previous stroke, n (%) | 124 (16.6) | 110 (16.9) | 14 (14.6) | .219 |
 Obesity, n (%) | 82 (11.0) | 76 (11.7) | 6 (6.3) | .112 |
 Osteoporosis, n (%) | 120 (16.1) | 110 (16.9) | 10 (10.4) | .105 |
 Osteoarthritis, n (%) | 112 (15.0) | 102 (15.7) | 10 (10.4) | .177 |
 Cancer, n (%) | 106 (14.2) | 92 (14.2) | 14 (14.6) | .910 |
 COPD, n (%) | 76 (10.2) | 70 (10.8) | 6 (6.3) | .172 |
Acute illness and complications | Â | Â | Â | Â |
 Acute kidney injury, n (%) | 156 (20.9) | 118 (18.2) | 38 (39.6) | <.001 |
 Pressure ulcer, n (%) | 50 (6.7) | 34 (5.2) | 16 (16.7) | <.001 |
 Weight loss, n (%) | 196 (26.3) | 174 (26.8) | 22 (22.9) | .423 |
 Infection, n (%) | 286 (38.3) | 236 (36.3) | 50 (52.1) | .003 |
Risk assessment | Â | Â | Â | Â |
 CCI | 3.7 ± 2.3 | 3.7 ± 2.2 | 3.6 ± 2.2 | .433 |
 BISEP | 3.0 ± 1.5 | 2.8 ± 1.5 | 3.7 ± 1.5 | <.001 |
 CIRS-G | 10.3 ± 5.0 | 9.9 ± 4.7 | 14.1 ± 6.2 | .002 |
Laboratory | Â | Â | Â | Â |
 Hemoglobin (g/dL) | 11.4 ± 2.3 | 11.4 ± 2.3 | 11.4 ± 2.0 | .704 |
 Creatinine clearance (mL/min/1.73 m 2 ) | 48.5 ± 23.8 | 48.5 ± 22.9 | 48.3 ± 29.2 | .453 |
 Albumin (g/dL) | 3.6 ± 0.6 | 3.6 ± 0.6 | 3.0 ± 0.6 | <.001 |
Hospital stay (days) | 16.7 ± 14.5 | 16.3 ± 14.4 | 18.9 ± 14.7 | .064 |