Table 3.
Rates and relative risk of undergoing TKA by age at TKA in 2016 (with versus without a history of ACL reconstruction)
| Age at TKA | Prior ACLr Annual rate TKA/105 (CI) | Without prior ACLr Annual rate TKA/105 (CI) | Relative risk RR (CI) |
|---|---|---|---|
| 30–39, n | 37 (20–63) | 1.9 (1.6–2.2) | 20 (11–35) |
| % | 0.04 (0.02–0.06) | 0.00 (0.00–0.00) | |
| 40–49, n | 186 (134–252) | 25 (24–26) | 7.5 (5.5–10) |
| % | 0.19 (0.13–0.25) | 0.02 (0.02–0.03) | |
| 50–59, n | 384 (269–531) | 151 (148–153) | 2.5 (1.8–3.5) |
| % | 0.38 (0.27–0.53) | 0.15 (0.15–0.15) | |
| 60–69, n | 717 (345–1,315) | 414 (408–419) | 1.7 (0.9–3.2) |
| % | 0.72 (0.34–1.32) | 0.41 (0.41–0.42) | |
| Overall, na | 148 (120–180) | 133 (131–134) | 1.1 (0.9–1.4) |
| % | 0.15 (0.12–0.18) | 0.13 (0.13–0.13) |
TKA = total or partial knee arthroplasty; ACLr = anterior cruciate ligament reconstruction; CI = 95% confidence interval.
a
30–69 years