TABLE 3.
Outcomes of Patients Receiving Primary Total Knee Arthroplasty in Top-Ranked Hospitals, Non–Top-Ranked Hospitals, and Hospitals Ineligible for the U.S. News & World Report Rankings
| Top-ranked hospitals (n=10,477) | Non–top-ranked hospitals (n=28,938) | Ineligible hospitals (n=25,297) | P valuea | |
|---|---|---|---|---|
| 30-d postoperative adverse event, No. (%) | 455 (4.3) | 1191 (4.1) | 843 (3.3) | <.001 |
| Mortality | 31 (0.3) | 65 (0.2) | 89 (0.4) | .02 |
| Pulmonary embolism | 66 (0.6) | 197 (0.7) | 150 (0.6) | .44 |
| Deep vein thrombosis | 192 (1.8) | 496 (1.7) | 270 (1.1) | <.001 |
| Wound infection | 88 (0.8) | 239 (0.8) | 167 (0.7) | .05 |
| Hemorrhage | 84 (0.8) | 208 (0.7) | 139 (0.6) | .009 |
| Sepsis | 26 (0.3) | 92 (0.3) | 83 (0.3) | .45 |
| Myocardial infarction | 30 (0.3) | 83 (0.3) | 73 (0.3) | >.99 |
| All-cause 30-d readmission, No. (%) | 858 (8.2) | 2425 (8.4) | 2037 (8.1) | .38 |
| Length of stay, mean (median, Q1-Q3), d | 3.7 (3, 3-4) | 3.8 (3, 3-4) | 3.7 (3, 3-4) | <.001 |
| In-hospital cost, mean (median, Q1-Q3) | $20,336 ($18,515, $14,205-$23,761) | $20,811 ($19,050, $15,261-$24,152) | $27,069 ($20,692, $16,162-$27,182) | <.001 |
a
P values were obtained from analysis of variance test for continuous variables and χ2 test for categorical variables.