Risk factors associated with ACL registry compliance: can we predict who will follow-up?

Purpose The purpose of this study was to determine patient factors that influence patient compliance to fill out anterior cruciate ligament reconstruction (ACLR) registry forms. Methods Patients prospectively enrolled in the ACLR registry at a single institution were retrospectively reviewed. Patients who were followed up for at least 6 months were included. Patients who did not fill out initial registry forms were excluded. Patients were asked to fill out forms preoperatively and at 6, 12 and 24 months postoperatively. The impacts of age, race, employment status, medical insurance, smoking status, driving distance to the hospital and importance to return to the same level of sporting activity were analyzed against patient compliance (yes/no) to complete registry forms at the respective follow-ups. Multivariate analysis was performed to analyze variables at 6 and 12 months postoperatively. The numbers of patients who were followed up for more than 24 months were too low to run a multivariate analysis, so only univariate analysis was performed on this cohort. Results A total of 221 patients filled out the initial preoperative forms at least 6 months before data gathering was commenced and were included. At 6 months postoperatively, none of the variables significantly influenced patient compliance. At 12 months, younger age and longer driving distance to the hospital had a significant negative impact on compliance [OR per year: 0.92 (0.85–0.99), p = 0.0237; OR per mile: 1.01 (1, 1.01), p = 0.0297]. Patients who filled out registry forms at 6 months were significantly more compliant at 12 months postoperatively ( p