title: Translation and validation of the korean version of the international knee documentation committee subjective knee form.
abstract: OBJECTIVE
  To perform a cross-cultural adaptation and to test the measurement properties of the Korean version of International Knee Documentation Committee (K-IKDC) Subjective Knee Form.
  
  
  METHODS
  According to the guidelines for cross-cultural adaptation, translation and backward translation of the English version of the IKDC Subjective Knee Form were performed. After translation into the Korean version, 150 patients who had knee-related problems were asked to complete the K-IKDC, Lysholm score, and Short Form-36 (SF-36). Of these patients, 126 were retested 2 weeks later to evaluate test-retest reliability, and 104 were recruited 3 months later to evaluate responsiveness. Construct validity was analyzed by investigating the correlation with Lysholm score and SF-36; content validity was also evaluated. Standardized mean response was calculated for evaluating responsiveness.
  
  
  RESULTS
  The test-retest reliability proved excellent with a high value for the intraclass correlation coefficient (r=0.94). The internal consistency was strong (Cronbach's α=0.91). Good content validity with absence of floor not ceiling effects and good convergent and divergent validity were observed. Moderate responsiveness was shown (standardized mean response=0.689).
  
  
  CONCLUSIONS
  The K-IKDC demonstrated good measurement properties. We suggest that this instrument is an excellent evaluation instrument that can be used for Korean patients with knee-related injuries.
authors.affiliation: Department of Orthopedic Surgery, Inje University Seoul Paik Hospital, Seoul, Korea.
authors.forename: Jin Goo
authors.initials: JG
authors.lastname: Kim
authors.forename: Jeong Ku
authors.initials: JK
authors.lastname: Ha
authors.forename: Joong Yub
authors.initials: JY
authors.lastname: Lee
authors.forename: Seung Suk
authors.initials: SS
authors.lastname: Seo
authors.forename: Choong Hyeok
authors.initials: CH
authors.lastname: Choi
authors.forename: Myung Chul
authors.initials: MC
authors.lastname: Lee
keywords: Cross-cultural adaptation; International Knee Documentation Committee; Knee; Korean version; Outcome measures
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