Table 4.
Reasons for Patient Readmissions at 30, 60, and 90 Daysa
| 30 d (n = 165) | 60 db (n = 319) | 90 db (n = 453) | |
|---|---|---|---|
| Complications of devicec | 159 (96.4) | 273 (85.6) | 331 (73.1) |
| Dislocation of prosthetic joint | 82 (49.6) | 141 (44.3) | 168 (37.0) |
| Mechanical loosening of prosthetic joint | 18 (10.9) | 21 (6.6) | 29 (6.4) |
| Periprosthetic joint fracture | 10 (6.1) | 13 (4.1) | 13 (2.9) |
| Acute posthemorrhagic anemia | 22 (13.3) | 54 (16.9) | 79 (17.4) |
| Postoperative infection | 4 (2.4) | 6 (1.9) | 6 (1.3) |
| Wound dehiscence | 4 (2.4) | 4 (1.3) | 4 (0.8) |
| Deep venous thrombosis | 8 (4.9) | 16 (5.0) | 30 (6.6) |
| Acute renal failure | 8 (4.9) | 11 (3.5) | 11 (2.4) |
| Urinary tract infection | 5 (3.0) | 7 (2.2) | 7 (1.6) |
| Septicemia | 3 (1.8) | 3 (0.9) | 3 (0.7) |
| Pulmonary embolism | 0 (0.0) | 3 (0.9) | 3 (0.7) |
| Pneumonia | 0 (0.0) | 0 (0.0) | 2 (0.4) |
| Acute myocardial infarction | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Cerebrovascular accident | 0 (0.0) | 0 (0.0) | 0 (0.0) |
aMedical reasons were the most common reasons for readmission. However, diagnoses included hypertension, gastroesophageal reflux disease, hyperlipidemia, and depression (ie, likely unrelated to index hospitalization/event). Values are presented as n (%).
bCases in each column are cumulative (ie, include all cases from previous readmission time points).
cIdentified through the Healthcare Cost and Utilization Project clinical classification software. Includes multiple diagnoses, such as dislocation and mechanical loosening.