Dialectal influence on chronic pulmonary disease assessment test: the reliability and validity study

International Journal of Chronic Obstructive Pulmonary Disease
Chaicharn PothiratAtikun Limsukon

Abstract

Chronic obstructive pulmonary disease (COPD) patients living in many countries are familiar with local dialects rather than the official language. We, therefore, compare the reliability and validity of the COPD Assessment Test (CAT) in Thai and northern Thai dialect versions, in stable COPD patients living in the northern part of Thailand. A total of 160 COPD patients were randomly selected for the evaluation of each dialect version of CAT (n=80). The internal consistency of all eight items and test-retest reliability were investigated by using Cronbach's alpha coefficient and intraclass correlation coefficient (ICCC), respectively. The validity was evaluated by the degree of correlation with St George's Respiratory Questionnaire (SGRQ) using Pearson's correlation. The correlations of CAT with clinical parameters such as forced expiratory volume in the first second (FEV1), modified Medical Research Council scale (mMRC) dyspnea score, and 6-minute walk distance (6-MWD) were also evaluated. The two versions of CAT showed high internal consistency reliability (Cronbach's alpha coefficient of 0.82 and 0.76) as well as a high test-retest reliability (ICCC of 0.82 and 0.84) for Thai and northern Thai dialect versions, respectively. T...Continue Reading

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