Tepa W.Chawanpaiboon P.Lertwanich P.Mahidol University2026-04-182026-04-182026-01-01Asia Pacific Journal of Sports Medicine Arthroscopy Rehabilitation and Technology (2026)https://repository.li.mahidol.ac.th/handle/123456789/116265Background/objective: The Simple Knee Value (SKV) is a knee-specific adaptation of the Single Assessment Numeric Evaluation (SANE), serving as a single-item patient-reported outcome measure for knee function. Although the SKV has been translated into Thai, its measurement properties have not yet been evaluated in patients with anterior cruciate ligament (ACL) injury. Therefore, this study aimed to evaluate the measurement properties of the Thai version of the SKV in this population. Methods: This prospective study included patients aged 18 to 50 years with ACL injury scheduled for surgery. Participants completed the Thai version of the SKV at three time points: preoperatively at baseline and 2 weeks later (for test-retest reliability), and 3 months postoperatively (for responsiveness). Three additional patient-reported outcome measures including the International Knee Documentation Committee Subjective Knee Form (IKDC-SKF), the Knee Injury and Osteoarthritis Outcome Score (KOOS), and the European Quality of Life 5-Dimension 5-Level were administered at baseline and 3 months. Results: Ninety patients completed assessments at all time points. The Thai SKV demonstrated acceptable psychometric properties. Construct validity was supported by positive correlations with comparator patient-reported outcome measures (Spearman rank correlation coefficients = 0.20 - 0.37). Test-retest reliability was excellent (intraclass correlation coefficient = 0.92; 95% confidence interval 0.88 - 0.95). The SKV showed large responsiveness to change (effect size = 0.96, standardized response mean = 0.92) and good external responsiveness through moderate correlations with change scores of other instruments (Spearman rank correlation coefficients = 0.33 - 0.49). No floor or ceiling effects were observed. The minimal clinically important difference was 10.0 points (sensitivity 82.0%, specificity 100.0%). Conclusion: The Thai version of the SKV is a valid and reliable tool for evaluating knee function in patients with ACL injury. Responsiveness of the instrument was demonstrated in the early postoperative phase. This single-item measure offers a practical screening and monitoring tool for clinical practice where time-efficient assessment is required. For comprehensive patient evaluation, it should be used alongside detailed questionnaires such as IKDC-SKF or KOOS.MedicineHealth ProfessionsArticleSCOPUS10.1016/j.asmart.2026.02.0012-s2.0-10503550672422146873