Pothirat Chaicharn, Chaiwong Warawut, Phetsuk Nittaya, Liwsrisakun Chalerm, Bumroongkit Chaiwat, Deesomchok Athavudh, Theerakittikul Theerakorn, Limsukon Atikun
Division of Pulmonary, Critical Care and Allergy, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
Int J Chron Obstruct Pulmon Dis. 2015 Mar 11;10:541-8. doi: 10.2147/COPD.S79041. eCollection 2015.
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. The test results revealed that the northern Thai dialect version had good correlation with SGRQ whereas the Thai version correlated only moderately.
The two Thai versions of CAT were proven to be good clinical tools with high reliability and acceptable validity for assessing the quality of life of Thai COPD patients. However, the northern Thai dialect version is more suitable for evaluating COPD patients living in the northern part of Thailand.
许多国家的慢性阻塞性肺疾病（COPD）患者熟悉当地方言而非官方语言。因此，我们比较了泰语版和泰国北部方言版慢性阻塞性肺疾病评估测试（CAT）在泰国北部稳定期COPD患者中的信度和效度。
共随机选取160例COPD患者对每个方言版本的CAT进行评估（n = 80）。分别使用Cronbach's α系数和组内相关系数（ICCC）研究所有八项内容的内部一致性和重测信度。通过Pearson相关性分析与圣乔治呼吸问卷（SGRQ）的相关程度来评估效度。还评估了CAT与临床参数如第一秒用力呼气量（FEV1）、改良医学研究委员会量表（mMRC）呼吸困难评分和6分钟步行距离（6-MWD）的相关性。
泰语版和泰国北部方言版的CAT两个版本均显示出较高的内部一致性信度（Cronbach's α系数分别为0.82和0.76）以及较高的重测信度（ICCC分别为0.82和0.84）。测试结果显示，泰国北部方言版与SGRQ有良好的相关性，而泰语版仅具有中等相关性。
泰语版的两个CAT版本被证明是评估泰国COPD患者生活质量的可靠临床工具，具有较高的信度和可接受的效度。然而，泰国北部方言版更适合评估生活在泰国北部的COPD患者。
