title: Responsiveness of the Korean version of the Michigan Hand Outcomes Questionnaire after carpal tunnel release.
abstract: BACKGROUND
  The Korean version of the Michigan Hand Outcomes Questionnaire (K-MHQ) was recently validated; however, the questionnaire's responsiveness as well as the degree to which the instrument is sensitive to change has not been thoroughly evaluated in a specific condition in Koreans. We evaluated the responsiveness of the K-MHQ in a homogenous cohort of patients with carpal tunnel syndrome (CTS) and we compared it with that of the Korean version of the Disability of the Arm, Shoulder, and Hand Questionnaire (K-DASH), which was found to have a large degree of responsiveness after carpal tunnel release for Korean patients with CTS.
  
  
  METHODS
  Thirty-seven patients with CTS prospectively completed the K-MHQ and the K-DASH before and 6 months after surgery. The responsiveness statistics were assessed for both the K-MHQ and the K-DASH by using the standardized response mean (SRM), which was defined as the mean change of the original scores after surgery divided by the standard deviation of the change.
  
  
  RESULTS
  All domains of the K-MHQ significantly improved after carpal tunnel release (p < 0.001). The SRM for all scales but one (the aesthetics scale) showed large responsiveness of ≥ 0.8. The aesthetics scale showed medium responsiveness of 0.6. The combined function/symptom scale of the K-DASH significantly improved after surgery (p < 0.001). The SRM of the K-DASH revealed large responsiveness of 0.9.
  
  
  CONCLUSIONS
  The K-MHQ was found to have a large degree of responsiveness after carpal tunnel release for Korean patients with CTS, which is comparable not only to the K-DASH, but also to the original version of the MHQ. The region-specific K-MHQ can be useful for outcomes research related to carpal tunnel surgery, especially for research comparing CTS with various other hand and wrist health conditions.
authors.affiliation: Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Seung Myung
authors.initials: SM
authors.lastname: Wi
authors.affiliation: Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Hyun Sik
authors.initials: HS
authors.lastname: Gong
authors.affiliation: Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Kee Jeong
authors.initials: KJ
authors.lastname: Bae
authors.affiliation: Department of Orthopedic Surgery, Gachon University Hospital, Incheon, Korea.
authors.forename: Young Hak
authors.initials: YH
authors.lastname: Roh
authors.affiliation: Department of Orthopedic Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Goo Hyun
authors.initials: GH
authors.lastname: Baek
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D002349:Carpal Tunnel Syndrome / Q000601:surgery*; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056910:Republic of Korea; D011795:Surveys and Questionnaires
keywords: Carpal tunnel syndrome; K-DASH; K-MHQ; Responsiveness