title: Development of the Japanese version of the COPD Assessment Test.
abstract: BACKGROUND
  We aimed to develop the Japanese version of the COPD Assessment Test (TM) (CAT), which was recently developed in overseas countries, to measure the health status of patients with chronic obstructive pulmonary disease (COPD) and to validate its psychometric properties.
  
  
  METHODS
  The original CAT was translated to Japanese through linguistic validation. Then, an Internet-based survey was conducted by including 301 Japanese patients with COPD who were over 40 years of age and had a history of smoking, to assess the reliability and validity of the translated CAT.
  
  
  RESULTS
  The Japanese CAT was shown to have high internal consistency (Cronbach's α coefficient: 0.891). The assessment using the Japanese CAT was highly correlated with assessment using the COPD-specific St. George's Respiratory Questionnaire (r = 0.820). The assessment also showed correlation between the Japanese CAT and a generic health-related quality of life (QOL) questionnaire (SF-12v2).
  
  
  CONCLUSIONS
  The Japanese version of the CAT has high reliability and validity, and can be expected to serve as a short and simple questionnaire for precise assessment of the health status of Japanese patients with COPD.
authors: Kirigaoka Tsuda Hospital, 3-9-20 Kirigaoka, Kokura-kita-ku, Kitakyushu, Fukuoka 802-0052, Japan. tsudat@k-you.or.jp
authors: Tohru
authors: T
authors: Tsuda
authors: Rika
authors: R
authors: Suematsu
authors: Kumie
authors: K
authors: Kamohara
authors: Mariko
authors: M
authors: Kurose
authors: Ichiro
authors: I
authors: Arakawa
authors: Ryusuke
authors: R
authors: Tomioka
authors: Tomotaka
authors: T
authors: Kawayama
authors: Tomoaki
authors: T
authors: Hoshino
authors: Hisamichi
authors: H
authors: Aizawa
mesh_terms: D044466:Asian People; D059026:Diagnostic Self Evaluation; D006304:Health Status; D006801:Humans; D007564:Japan; D007802:Language; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000523:psychology*; D011788:Quality of Life; D015203:Reproducibility of Results; D012907:Smoking; D011795:Surveys and Questionnaires