Characteristics and unadjusted association of potential prognostic determinants with 90-day post discharge mortality*
| Alive, n=1460 | Expired*, n=107 | Total, n=1567 | P values | Unadjusted or (95% CI) for 90- day postdischarge mortality | |
| Age (years), mean±SD | 57.5±18.8 | 68.8±15.4 | 58.3±18.8 | <0.001† | 1.04 (1.02 to 1.05) |
| Male (gender), no. (%) | 747 (51) | 59 (55) | 806 (51) | 0.43 | 1.17 (0.79 to 1.74) |
| Non-white (race) no. (%) | 352 (24) | 11 (10) | 363 (23) | 0.001 | 0.36 (0.19 to 0.68) |
| Surgical patient type, no. (%) | 1324 (91) | 95 (89) | 1419 (91) | 0.52 | 0.81 (0.43 to 1.52) |
| Deyo-Charlson Index, no. (%) | 1.04 (1.02 to 1.05) | ||||
| 0–1 | 491 (34) | 18 (17) | 509 (33) | <0.001 | 1.00 (Referent) |
| 2–3 | 523 (36) | 33 (31) | 556 (35) | 1.72 (0.96 to 3.10) | |
| 4–6 | 354 (24) | 36 (34) | 390 (25) | 2.77 (1.55 to 4.96) | |
| ≥7 | 92 (6) | 20 (19) | 112 (7) | 5.93 (3.02 to11.64) | |
| RDW at hospital admission, mean±SD | 14.65±1.75 | 16.06±2.37 | 14.75±1.84 | <0.001† | 1.35 (1.24 to 1.48) |
| Number of organs with acute failure, no. (%) | |||||
| 0 | 307 (21) | 13 (12) | 320 (20) | 0.001 | 1.00 (Referent) |
| 1 | 414 (28) | 24 (22) | 438 (28) | 1.37 (0.69 to 2.73) | |
| 2 | 397 (27) | 29 (27) | 426 (27) | 1.73 (0.88 to 3.37) | |
| 3 | 207 (14) | 19 (18) | 226 (14) | 2.17 (1.05 to 4.49) | |
| ≥4 | 135 (9) | 22 (21) | 157 (10) | 3.85 (1.88 to 7.87) | |
| Malignancy, no. (%) | 522 (36) | 59 (55) | 581 (37) | <0.001 | 2.21 (1.49 to 3.28) |
| Acute kidney injury, no. (%)§ | 117 (9) | 20 (24) | 137 (10) | <0.001 | 2.39 (1.57 to 3.63) |
| Sepsis, no.(%) | 336 (23) | 39 (36) | 375 (24) | 0.002 | 1.92 (1.27 to 2.90) |
| Vasopressors/inotropes, no. (%) | 724 (50) | 64 (60) | 788 (50) | 0.041 | 1.51 (1.01 to 2.26) |
| Acute organ failure score, mean±SD¶ | 7.76±4.55 | 10.66±4.59 | 7.96±4.61 | <0.001† | 1.33 (1.23 to 1.45) |
| RDW at hospital discharge, mean±SD | 15.32±1.90 | 16.69±2.26 | 15.42±1.95 | <0.001† | 2.06 (1.39 to 3.06) |
| Length of stay, median (IQR) | 11 (7–21) | 15 (10–27) | 12 (7–21) | <0.001‡ | 1.02 (1.01 to 1.03) |
| Change in expected length of stay, median (IQR) | 2.8 (−1.0 to 11.7) | 7.5 (0.7–21.5) | 3.1 (−0.9 to 12.1) | 0.002‡ | 2.09 (1.40 to 3.10) |
| Discharge to care facility, no. (%) | 483 (33) | 54 (50) | 537 (34) | <0.001 | 1.37 (0.69 to 2.73) |
| 90-day readmission, no. (%) | 421 (29) | 49 (46) | 470 (30) | <0.001 | 1.73 (0.88 to 3.37) |
Data presented as no. (%) unless otherwise indicated.
*Expired within 90 days after hospital discharge.
†P analyzed by Χ2 except for analyzed by analysis of variance.
‡P analyzed by Χ2 except for analyzed by Kruskal-Wallis test.
§Acute kidney injury is RIFLE class injury or failure and available on 1341 patients.
¶ The acute organ failure score is a severity of illness risk-prediction score ranging from 0 to 30 points with 30 having the highest risk for mortality.