Patient characteristics by RDW category group hospital discharge RDW
| ≤13.3 | 13.3–14.0 | 14.0–14.7 | 14.7–15.8 | 15.8%–17.0% | >17.0% | P values | |
| n | 154 | 223 | 263 | 381 | 274 | 272 | |
| Age, mean±SD | 44.07±19.70 | 55.57±19.08 | 59.64±19.5 | 60.49±17.94 | 62.25±16.88 | 60.31±16.66 | <0.001* |
| Male gender, no. (%) | 102 (66) | 127 (57) | 135 (51) | 188 (49) | 134 (49) | 120 (44) | <0.001 |
| Non-white race, no. (%) | 55 (36) | 46 (21) | 59 (22) | 95 (25) | 52 (19) | 56 (21) | 0.002 |
| Surgical patient type, no. (%) | 140 (91) | 199 (89) | 245 (93) | 347 (91) | 240 (88) | 248 (91) | 0.35 |
| Deyo-Charlson index, n (%) | |||||||
| 0–1 | 86 (56) | 90 (40) | 83 (32) | 114 (30) | 75 (27) | 61 (22) | <0.001 |
| 2–3 | 49 (32) | 72 (32) | 111 (42) | 133 (35) | 91 (33) | 100 (37) | |
| 4–6 | 10 (6) | 45 (20.18) | 58 (22.05) | 112 (29.4) | 79 (28.83) | 86 (31.62) | |
| ≥7 | 9 (6) | 16 (7) | 11 (4.18) | 22 (5.77) | 29 (10.58) | 25 (9.19) | |
| RDW at hospital admission, mean±SD | 12.81±0.53 | 13.51±0.71 | 14.10±0.93 | 14.80±1.20 | 15.49±1.52 | 16.63±2.38 | <0.001* |
| Number of organs with acute failure no. (%) | |||||||
| 0 | 85 (55) | 76 (34) | 52 (20) | 52 (14) | 27 (10) | 28 (10) | <0.001 |
| 1 | 41 (27) | 77 (35) | 77 (29) | 125 (33) | 70 (26) | 48 (18) | |
| 2 | 20 (13) | 44 (20) | 76 (29) | 112 (29) | 85 (31) | 89 (33) | |
| 3 | 3 (2) | 20 (9) | 35 (13) | 58 (15) | 55 (20) | 55 (20) | |
| ≥4 | 5 (3) | 6 (3) | 23 (9) | 34 (9) | 37 (14) | 52 (19) | |
| Malignancy, no. (%) | 16 (10) | 66 (30) | 104 (40) | 157 (41) | 114 (42) | 124 (46) | <0.001 |
| Acute kidney injury, no. (%)† | 6 (4) | 6 (3) | 21 (10) | 27 (8) | 35 (15) | 42 (18) | <0.001 |
| Sepsis, no. (%) | 7 (5) | 27 (12) | 45 (17) | 103 (27) | 91 (33) | 102 (38) | <0.001 |
| Vasopressors/inotropes, no. (%) | 29 (19) | 77 (35) | 130 (49) | 210 (55) | 168 (61) | 174 (64) | <0.001 |
| Acute organ failure score, mean±SD | 4.02±3.94 | 6.53±3.93 | 7.76±4.37 | 8.37±4.44 | 9.49±4.45 | 9.41±4.48 | <0.001* |
| Length of stay, median (IQR) | 5 (3–7) | 8 (5–11) | 11 (7–17) | 13 (8–23) | 19 (10–33) | 18 (12–33) | <0.001‡ |
| Change in expected length of stay, median (IQR) | −0.7 (−3.0 to 0.7) | 0.2 (−2.3 to 3.4) | 2.5 (−1.1 to 8.1) | 5.3 (−0.3 to 14.8) | 9.0 (1.3–24.9) | 8.9 (2.6–4.7) | <0.001 ‡ |
| Discharge to care facility, no. (%) | 15 (10) | 49 (22) | 84 (32) | 144 (38) | 124 (45) | 121 (44) | <0.001 |
| 90-day readmission, no. (%) | 20 (13) | 49 (22) | 71 (27) | 128 (34) | 107 (39) | 95 (35) | <0.001 |
| 90-day postdischarge mortality, no. (%) | 3 (2) | 4 (2) | 11 (4) | 19 (5) | 33 (12) | 37 (14) | <0.001 |
| 365-day postdischarge mortality, no. (%) | 5 (3) | 20 (9) | 31 (12) | 58 (15) | 64 (23) | 73 (27) | <0.001 |
Data presented as no. (%) unless otherwise indicated.
*P analyzed for Χ2 except for analyzed by analysis of variance.
‡P analyzed for Χ2 except for analyzed by Kruskal-Wallis test.
†Acute kidney injury is RIFLE class injury or failure. Information on acute kidney injury available on 1341 patients.
RDW, red cell distribution width.