Cross Cultural Adaptation and Translating the IKDC Subjective Form into the Korean Language

PURPOSE: To develop and translate into Korean the International Knee Documentation Committee Subjective Knee Evaluation Form. MATERIALS AND METHODS: There were 6 steps for the cross-cultural adaptation to standardize the language and cultural differences as follows translation for stage I, synthesis for stage II, back translation for stage III, a review by an expert committee for stage IV, pre-testing for stage V, and submission of the documentation to the AAOS Committee for appraisal was for the final stage VI. A total of 120 patients from 4 hospitals underwent the pre-testing which is the stage V on this process. RESULTS: 30 patients who fully underwent the preoperative and postoperative testing at 3 month were evaluated. The average age of participants was 43.1. There were 12 cases of meniscus tears, 8 cases of primary degenerative arthritis, 4 cases of patellofemoral pressure syndromes and 8 cases of other knee disorders. In the results, we found that there was statistically the strong correlation as follow the test and re-test reliability (p=0.6373), the internal consistency for each evaluation item (p=0.9135), the validity was 0.8882 and the responsiveness (p=0.6605). CONCLUSION: The Korean version of the IKDC subjective knee evaluation form was excellent as our results showed on its reliability, validity and responsiveness through the rigid steps of cross-cultural adaptation. It was submitted to the AAOS Committee for Appraisal. We strongly suggest that it should be considered as part of an effective evaluation for a variety of knee diseases.

The Correlation between Outcome Evaluation Systems after Anterior Cruciate Ligament Reconstruction

PURPOSE: The purpose of this study was to evaluate the correlation between various subjective, objective tests and real functional performances of the patients after ACL reconstruction. METHOD: Twenty-four patients after ACL reconstruction using 12 hamstring autograft and 12 Achilles allograft were evaluated. Lysholm knee score, IKDC subjective score, Knee Outcome Survey score and Tegner activity score were evaluated for the subjective outcome value. Static instability tests, Biodex dynamometer and hop tests were done for the objective outcome value. Three functional performance tests(FPTs) such as carioca test, shuttle run test and co-contraction test were done for deciding the real performance ability of the patients. Each score system was compared with FPT results. RESULTS: The results of Hamstring group were better than those of Achilles group, but there was no statistical significance. IKDC subjective score, single leg hopping test, and quadriceps power in low velocity of biodex dynamometer tests had a positive correlation with the total FPT results. CONCLUSION: IKDC subjective score, one leg hopping test showed significant correlation with functional performance test and they can be used as effective methods to decide whether the subjects after ACL reconstruction can return to sports activity.