Development of the IKDC Forms
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The International Knee Documentation Committee (IKDC) was formed under the auspices of The American Orthopaedic Society for Sports Medicine and The European Society of Knee Surgery and Arthroscopy in 1987 to develop a standardized international documentation system to evaluate treatment for acute ACL injuries. It was anticipated that the IKDC Knee Evaluation Form would serve as a foundation for a more comprehensive evaluation system, allowing for valid scientific analysis of knee function. The first step was to agree on standard terminology to document motion and function. Next, clinical examination of the limits of knee motion was critiqued, and core measurements were adopted.
Studies performed by the committee demonstrated that even under the best circumstances, large variations existed in clinicians’ estimation of tibial displacement. Consequently, clinical examination tests for knee laxity were only considered qualitative; therefore, the IKDC Knee Evaluation Form could not be validated.
In March 1997, the IKDC Knee Evaluation Form was revised to include additional objective assessment. Advancement in the measurement of patient-reported outcomes was also used to develop the IKDC Subjective Knee Form, making this module valid and more broadly applicable.
The IKDC Subjective Knee Form was rigorously tested and found to be valid, reliable, and responsive for evaluation of symptoms, function, and sports activity in patients with a variety of knee disorders. As a result of rigorous psychometric testing, the availability of normative data, development of a pediatric version, and psychometric characteristics that are superior to other patient-reported outcome instruments, the IKDC Subjective Knee Form has gained worldwide recognition and popularity. It has been culturally adapted and translated into 19 languages.
KeywordsPatient-reported outcomes Knee IKDC ACL Knee region-specific form
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