Table 3.
Readmission rates and in-hospital outcomes during readmission
| Discharge to 30-d cohort | All patients (n=16,004) | Hospital Frailty Risk Score |
Adjusted P value∗ |
||
|---|---|---|---|---|---|
| Low (n=7357) | Intermediate (n=7163) | High (n=1484) | |||
| Readmission data | |||||
| 30-d readmission rate | 2185 (14) | 912 (12) | 1111 (16) | 162 (11) | 0.001 |
| MAE during readmission | 605 (28) | 220 (24) | 335 (30) | 50 (31) | 0.006 |
| Acute kidney injury | 804 (37) | 287 (31) | 431 (39) | 86 (53) | <0.001 |
| Need for transfusions | 296 (14) | 120 (13) | 151 (14) | 25 (15) | 0.57 |
| In-hospital death during readmission | 179 (8.2) | 71 (7.8) | 84 (7.6) | 24 (15) | 0.09 |
| Length of stay (d) | 4 (2-7) | 4 (2-6) | 4 (2-7) | 5 (3-9) | <0.001 |
| ≤4 d | 1201 (55) | 546 (60) | 575 (52) | 80 (49) | 0.008 |
| >4 d | 984 (45) | 366 (40) | 536 (48) | 82 (51) | |
| Readmission cost (USD) | 9775 (5457-19,886) | 9088 (5129-19,789) | 9987 (5740-19,463) | 11,547 (6265-22,387) | <0.001 |
| Discharge destination after readmission | |||||
| Home (self-care) | 774 (39) | 424 (50) | 319 (31) | 31 (22) | <0.001 |
| Short-term hospital | 35 (1.7) | 13 (1.5) | 18 (1.8) | <11 (2.9) | |
| Transfer to other institution† | 556 (28) | 137 (16) | 359 (35) | 60 (43) | |
| Home health care | 623 (31) | 263 (31) | 319 (31) | 41 (30) | |
| Against medical advice | 18 (0.9) | <11 (0.5) | 12 (1.2) | <11 (1.4) | |
| Discharge to 31-180-d cohort | All patients (n=6497) | Hospital Frailty Risk Score | Adjusted P value∗ |
||
| Low (n=2976) |
Intermediate (n=2898) |
High (n=623) |
|||
| Readmission data | |||||
| 31-180-d readmission rate | 1809 (28) | 614 (21) | 964 (33) | 231 (37) | <0.001 |
| MAE during readmission | 201 (11) | 65 (11) | 105 (11) | 31 (13) | 0.59 |
| Acute kidney injury | 585 (32) | 159 (26) | 338 (35) | 88 (38) | <0.001 |
| Need for transfusions | 196 (11) | 58 (9.4) | 103 (11) | 35 (15) | 0.08 |
| In-hospital death during readmission | 116 (6.4) | 29 (4.7) | 68 (7.1) | 19 (8.2) | 0.02 |
| Length of stay (d) | 4 (2-8) | 4 (2-6) | 4 (3-8) | 5 (3-9) | <0.001 |
| ≤4 d | 985 (54) | 369 (60) | 512 (53) | 104 (45) | <0.001 |
| >4 d | 824 (46) | 245 (40) | 452 (47) | 127 (55) | |
| Readmission cost (USD) | 10,386 (5621-20,526) | 10,128 (5297-20,200) | 10,385 (5661-20,932) | 10,921 (6786-21,333) | <0.001 |
| Discharge destination after readmission | |||||
| Home (self-care) | 758 (45) | 345 (59) | 358 (40) | 55 (26) | <0.001 |
| Short-term hospital | 18 (1.1) | <11 (1.0) | <11 (1.1) | <11 (0.9) | |
| Transfer to other institution† | 434 (26) | 92 (16) | 255 (28) | 87 (41) | |
| Home health care | 473 (28) | 137 (23) | 269 (30) | 67 (32) | |
| Against medical advice | <11 (0.6) | <11 (0.9) | <11 (0.4) | <11 (0.5) | |
Values are expressed as mean ± standard deviation, median (interquartile range), or counts (%) unless otherwise noted. Exact counts for variables with <11 patients are not detailed per the Healthcare Cost and Utilization Project data use agreement. Boldface indicates statistical significance (P < .05).
CI, confidence interval; MAE, major adverse events; OR, odds ratio; USD, US dollar.
∗
Adjusted P values for each variable were computed from adjusting sampling design by discharge-level weights, cluster, and strata.
†
Other institutions included skilled nursing facilities, intermediate care, or other types of facilities not elsewhere included.