title: Validity and Reliability of CAT and Dyspnea-12 in Bronchiectasis and Tuberculous Destroyed Lung.
abstract: BACKGROUND
  The objective of this study was to assess the validity and reliability of the Korean version of chronic obstructive pulmonary disease assessment test (CAT) and Dyspnea-12 Questionnaire for patients with bronchiectasis or tuberculous destroyed lung.
  
  
  METHODS
  For 62 bronchiectasis patients and 37 tuberculous destroyed lung patients, 3 questionnaires including St. George's Respiratory Questionnaires (SGRQ), CAT, and Dyspnea-12 were obtained, in addition to spirometric measurements. To assess the validity of CAT and Dyspnea-12, correlation with SGRQ was evaluated. To assess the reliability of CAT and Dyspnea-12, Cronbach's α coefficient was calculated.
  
  
  RESULTS
  The mean ages of the patients were 60.7±8.3 years in bronchiectasis and 64.4±9.3 years in tuberculous destroyed lung. 46.8% and 54.1% were male, respectively. The SGRQ score was correlated with the score of the Korean version of CAT (r=0.72, p<0.0001) and Dyspnea-12 (r=0.67, p<0.0001) in bronchiectasis patients. The SGRQ score was correlated with the score of CAT (r=0.86, p<0.0001) and Dyspnea-12 (r=0.80, p<0.0001) in tuberculous destroyed lung patients. The Cronbach's α coefficient for the CAT and Dyspnea-12 were 0.84 and 0.90 in bronchiectasis, and 0.88 and 0.94 in tuberculous destroyed lung, respectively.
  
  
  CONCLUSIONS
  We found that Korean version of CAT and Dyspnea-12 are valid and reliable in patients with tuberculous destroyed lung and bronchiectasis.
authors.affiliation: Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Bo Young
authors.initials: BY
authors.lastname: Lee
authors.forename: Seohyun
authors.initials: S
authors.lastname: Lee
authors.forename: Jae Seung
authors.initials: JS
authors.lastname: Lee
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Song
authors.forename: Sang-Do
authors.initials: SD
authors.lastname: Lee
authors.forename: Seung Hun
authors.initials: SH
authors.lastname: Jang
authors.forename: Ki-Suck
authors.initials: KS
authors.lastname: Jung
authors.forename: Yong Il
authors.initials: YI
authors.lastname: Hwang
authors.forename: Yeon-Mok
authors.initials: YM
authors.lastname: Oh
keywords: Bronchiectasis; Dyspnea; Questionnaires; Severity of Illness Index; Tuberculosis; Validation Studies