title: Validation of the Korean version Moorehead-Ardelt quality of life questionnaire II.
abstract: OBJECTIVE
  To investigate the weight loss effects with higher sensitivity, disease specific quality of life (QoL) instruments were important. The Moorehead-Ardelt quality of life questionnaire II (MA-II) is widely used, because it was simple and validated the several languages. The aims of present study was performed the translation of MA-II Korean version and the validation compared with EuroQol-5 dimension (EQ-5D), obesity-related problems scale (OP-scale), and impact of weight quality of life-lite (IWQoL-Lite).
  
  
  METHODS
  The study design was a multicenter, cross-sectional survey and this study was included the postoperative patients. The validation procedure is translation-back translation procedure, pilot study, and field study. The instruments of measuring QoL included the MA-II, EQ-5D, OP-scale, and IWQoL-lite. The reliability was checked through internal consistency using Cronbach alpha coefficients. The construct validity was assessed the Spearman rank correlation between 6 domains of MA-II and EQ-5D, OP-scale, and 5 domains of IWQoL-Lite.
  
  
  RESULTS
  The Cronbach alpha of MA-II was 0.763, so the internal consistency was confirmed. The total score of MA-II was significantly correlated with all other instruments; EQ-5D, OP-scale, and IWQoL-Lite. IWQoL-lite (ρ = 0.623, P < 0.001) was showed the strongest correlation compared with MA-II, followed by OP-scale (ρ = 0.588, P < 0.001) and EQ-5D (ρ = 0.378, P < 0.01).
  
  
  CONCLUSIONS
  The Korean version MA-II was valid instrument of measuring the obesity-specific QoL. Through the present study, the MA-II was confirmed to have good reliability and validity and it was also answered simple for investigating. Thus, MA-II could be estimated sensitive and exact QoL in obesity patients.
authors.affiliation: Department of Family Medicine, Inha University School of Medicine, Incheon, Korea.
authors.forename: Yeon Ji
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea. ; School of Pharmacy, Sungkyunkwan University, Suwon, Korea.
authors.forename: Hyun Jin
authors.initials: HJ
authors.lastname: Song
authors.affiliation: National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea. ; Department of Surgery, Inha University School of Medicine, Incheon, Korea.
authors.forename: Yoonseok
authors.initials: Y
authors.lastname: Heo
authors.affiliation: National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea.
authors.forename: Sung-Hee
authors.initials: SH
authors.lastname: Oh
authors.affiliation: National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea. ; College of Pharmacy, Kyungpook National University, Daegu, Korea.
authors.forename: Jin Won
authors.initials: JW
authors.lastname: Kwon
authors.affiliation: Department of Family Medicine, Inha University School of Medicine, Incheon, Korea.
authors.forename: Kon-Hak
authors.initials: KH
authors.lastname: Moon
authors.affiliation: Department of Surgery, Chung-Ang University College of Medicine, Seoul, Korea.
authors.forename: Joong-Min
authors.initials: JM
authors.lastname: Park
authors.affiliation: Department of Surgery, The Catholic University of Korea School of Medicine, Seoul, Korea.
authors.forename: Sang Kuon
authors.initials: SK
authors.lastname: Lee
keywords: BAROS; Bariatric surgery; MA-II; QOL; Validation