Objective: To determine the rate of total knee replacement (TKR) after anterior cruciate ligament reconstruction (ACL-R) compared to the general population.
Design: Retrospective review.
Setting: All hospitals that performed TKR and ACL-R in Manitoba between 1980 and 2015.
Participant: All patients that underwent TKR and ACL-R in Manitoba between 1980 and 2015.
Intervention: Patient factors gathered at time of surgery included: age, sex, urban or rural residence, neighborhood income quintile, and resource utilization band (RUB). Each person was matched with up to 5 people from the general population who had never had ACL-R and had not had a TKR at the time of the case ACL-R.
Main Outcome Measures: The rate of TKR after ACL-R.
Results: Overall from 1980 to 2015, 8500 ACL-R were identified within the 16 to 60 years age group with a resultant 42 497 population matches. Sex was predominantly male. The mean age of the ACL-R group at the time of TKR was 53.7 years, whereas the mean age for the matched cohort was 58.2 years, P < 0.001. Those with ACL-R were 4.85 times more likely to go on to have TKR. Apart from age, no other risk factors examined (location, year of surgery, place of residence, income quintile, and RUB) seemed to increase risk of TKR after ACL-R.
Conclusion: Patients who underwent ACL-R were 5 times more likely to undergo TKR.
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