Abstract
Objectives:
To identify preoperative risk factors for ipsilateral ACL reinjury following ACLPR with a minimum follow-up of 5-years.
Methods:
This prospective cohort study evaluated the outcomes of the first 113 consecutive patients with proximal ACL tears who underwent ACL primary repair (ACLPR) by a single surgeon,at minimum 5-year follow-up. Assessment included knee laxity testing, Pivot shift test, and a standardized patient interview to evaluate any potential for ipsilateral reinjury. Toidentify preoperative risk factors for ipsilateral reinjury, univariate and multivariate logistic regression models were used. Preoperative risk factors included demographic (sex, age,BMI, activity level, surgery delay) and clinical variables (pivot shift grade, concomitant injuries).
Results:
Outcomes were assessed for 107 patients (median age 35.5 years, IQR 22.4-43.1) at the final follow-up (median 6.0 years, IQR 5.3-7.0). Six patients (5%) were lost to follow-up. Analysis of preoperative risk factors showed that younger age significantly affected ACLPR survival negatively (p = 0.002), with a 12.5% reduction in the risk of failure for eachadditional year of age. Additional demographic (sex, BMI, activity level, surgery delay) and clinical characteristics (pivot shift grade, concomitant injuries) did not show a significantimpact on the survival of the ipsilateral ACL following ACLPR over a minimum 5-year follow-up.
Conclusions:
Age was identified as a significant risk factor for ipsilateral ACL reinjury, with a 12.5% decrease in the odds of failure for each year increase in age. This indicates that younger patients experience higher rates of reinjury.