Validity and Reliability of the Clinician Rated Drop Vertical Jump Scale in Patients Following Anterior Cruciate Ligament Reconstruction

The purpose of this study was to evaluate the validity and reliability of the Clinician Rated Drop Vertical Jump Scale (CR-DVJS) in a population of patients following anterior cruciate ligament reconstruction (ACLR). Patients completed two drop vertical jump tasks at 6 and/or 12-months post-operative. One task was recorded using a motion capture system. Four individuals of varying clinical experience served as raters for the CR-DVJS. Rater scores of valgus collapse did not correlate strongly with motion capture measures of knee abduction moment or angle. However, CR-DVJS scores of trunk and knee flexion did demonstrate an association with 3D measures of trunk (rho=0.4-0.5) and knee (rho\u3e0.5) flexion angle. Intraclass correlation coefficients suggested poor to good (0.4-0.9) inter-rater reliability of overall score, moderate (0.5-0.75) or good (0.75-0.9) intra-rater reliability, and good to excellent (0.75-\u3e0.9) within session test-retest reliability. Further studies are required to draw definitive conclusions prior to clinical implementation