TABLE I.
Results of the Meta-Analysis
| Outcome | No. of Patients | No. of Events | Heterogeneity, I2 (%) | Odds Ratio or Difference (95% CI) |
| Any infection | 15,276 | 253 | 26 | 1.90 (1.46 to 2.47) |
| Superficial infection | 4905 | 126 | 6 | 2.17 (1.47 to 3.13) |
| Deep infection | 5061 | 45 | 0 | 2.38 (1.28 to 4.55) |
| Any revision | 12,101 | 277 | 25 | 1.30 (1.02 to 1.67) |
| Revision for infection | 13,686 | 75 | 0 | 0.98 (0.61 to 1.56) |
| Revision for aseptic loosening | 10,207 | 135 | 0 | 1.23 (0.87 to 1.75) |
| Intraoperative fracture | 10,363 | 17 | 0 | 1.03 (0.38 to 2.78) |
| Nerve injury | 10,217 | 12 | 0 | 0.89 (0.28 to 2.86) |
| Intraoperative tendon/ligament rupture | 10490 | 16 | 29 | 0.97 (0.35 to 2.70) |
| Venous thromboembolism | 13,459 | 106 | 0 | 1.19 (0.78 to 1.82) |
| Knee Society Score | 670 | — | 0 | 3.23 (1.57 to 4.90)* |
| Knee Society function subscore | 1302 | — | 84 |
*
A positive difference indicates a higher score in the nonobese group.