title: [Validity and reliability of Turkish version of St. George's respiratory questionnaire].
abstract: BACKGROUND
  The importance of the evaluation of health status in chronic obstructive pulmonary disease (COPD) is recently highlighted in many studies. In this study, we aimed to test the validity and reliability of the Turkish version of St. George Respiratory Questionnaire (SGRQ).
  
  
  METHODS
  The study was conducted in seven centers in Turkey. Three hundred and twenty one COPD patients (40-75 years) were included to the study. Turkish versions of breathlessness, Cough, and Sputum Scale (BCSS), mMRC (Modified Medical Research Council) dyspnea scale, SGRQ, COPD assessment test (CAT) and Short Form Health Survey (SF-36) were carried out to the patients. The statistical analysis of SGRQ was performed by using the coefficient of internal consistency, discriminative analysis for different stages and the correlation with the other scales.
  
  
  RESULTS
  The mean age was 62.4 ± 8.9 years and the mean FEV1 was 51.9 ± 19.2% pred. The coefficient of internal consistency (Cronbach alpha) was 0.8815. The correlation between the total score measured initially and that obtained two weeks later was found to be highly significant (r= 0.90, p< 0.0001). According the results of validation of both total score and the components of SGRQ, the correlation between the total score of SGRQ and CAT was 0.782 (p< 0.0001), SGRQ and SF-36 was between -0.481 ile -0.819 (p< 0.0001). The total and component scores were able to discriminate different disease stages and a significant correlation was found to be with pulmonary function tests.
  
  
  CONCLUSIONS
  SGRQ Turkish version is a reliable and valid assessment tool for COPD patients in clinical practice.
authors.affiliation: Department of Chest Diseases, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey. mpolatli@ttmail.com
authors.forename: Mehmet
authors.initials: M
authors.lastname: Polatlı
authors.forename: Arzu
authors.initials: A
authors.lastname: Yorgancıoğlu
authors.forename: Ömer
authors.initials: Ö
authors.lastname: Aydemir
authors.forename: Nilgün
authors.initials: N
authors.lastname: Yılmaz Demirci
authors.forename: Gamze
authors.initials: G
authors.lastname: Kırkıl
authors.forename: Sibel
authors.initials: S
authors.lastname: Atış Naycı
authors.forename: Nurdan
authors.initials: N
authors.lastname: Köktürk
authors.forename: Atilla
authors.initials: A
authors.lastname: Uysal
authors.forename: Selim Erkan
authors.initials: SE
authors.lastname: Akdemir
authors.forename: Eylem Sercan
authors.initials: ES
authors.lastname: Özgür
authors.forename: Gonca
authors.initials: G
authors.lastname: Günakan
mesh_terms: D000368:Aged; D003371:Cough; D004417:Dyspnea / Q000175:diagnosis / Q000473:pathology; D005260:Female; D006304:Health Status; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000473:pathology; D015203:Reproducibility of Results; D012129:Respiratory Function Tests; D013183:Sputum; D011795:Surveys and Questionnaires / Q000592:standards*; D014421:Turkey