Table 3.

Operative intervention for TKA 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	34 (1.9)	1.83 (1.29-2.59)	0.001
2 months	5031	79 (1.6)	1.55 (1.22-1.96)	0.0003
3 months	5659	78 (1.4)	1.33 (1.05-1.69)	0.019
4 months	4197	62 (1.5)	1.43 (1.09-1.85)	0.009
5 months	3259	47 (1.4)	1.39 (1.03-1.88)	0.031
6 months	2444	38 (1.6)	1.50 (1.08-2.09)	0.016
7 months	1839	28 (1.5)	1.47 (1.01-2.15)	0.048
8 months	1477	16 (1.1)	1.04 (0.63-1.72)	0.875
9 months	1257	4 (0.3)	0.31 (0.12-0.83)	0.019
10 months	1053	13 (1.2)	1.19 (0.68-2.07)	0.541
11 months	850	0 (0.0)	0.06 (0.01-0.89)	0.042
12 months	733	4 (0.6)	0.54 (0.20-1.45)	0.22
No injection	54081	563 (1.0)	Reference

CI = confidence interval.