Table 2.
Any postoperative surgical site infection within 6 months of TKA
| Time between injection and TKA | Total TKA | TKA with infection (%) | Unadjusted OR (95% CI) | p value |
|---|---|---|---|---|
| 1 month | 1804 | 83 (4.6) | 1.29 (1.03-1.62) | 0.024 |
| 2 months | 5031 | 220 (4.4) | 1.23 (1.06-1.42) | 0.005 |
| 3 months | 5659 | 247 (4.4) | 1.23 (1.07-1.40) | 0.003 |
| 4 months | 4197 | 192 (4.6) | 1.28 (1.11-1.50) | 0.001 |
| 5 months | 3259 | 150 (4.6) | 1.30 (1.09-1.54) | 0.003 |
| 6 months | 2444 | 126 (5.2) | 1.46 (1.21-1.76) | < 0.001 |
| 7 months | 1839 | 70 (3.8) | 1.06 (0.83-1.35) | 0.625 |
| 8 months | 1477 | 51 (3.5) | 0.96 (0.72-1.27) | 0.779 |
| 9 months | 1257 | 55 (4.4) | 1.23 (0.93-1.62) | 0.141 |
| 10 months | 1053 | 36 (3.4) | 0.95 (0.68-1.33) | 0.766 |
| 11 months | 850 | 29 (3.4) | 0.95 (0.65-1.38) | 0.781 |
| 12 months | 733 | 28 (3.8) | 1.07 (0.73-1.56) | 0.741 |
| No injection | 54,081 | 1942 (3.6) | Reference |
OR = odds ratio; CI = confidence interval.