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

Pothirat C, Chaiwong W, Phetsuk N, Liwsrisakun C, Bumroongkit C, Deesomchok A, Theerakittikul T, Limsukon A - Int J Chron Obstruct Pulmon Dis (2015)

Bottom Line: The validity was evaluated by the degree of correlation with St George's Respiratory Questionnaire (SGRQ) using Pearson's correlation.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.

View Article: PubMed Central - PubMed

Affiliation: Division of Pulmonary, Critical Care and Allergy, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.

ABSTRACT

Background: 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.

Methods: 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.

Results: 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.

Conclusion: 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.

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Related in: MedlinePlus

Correlation between SGRQ and CAT scores.Notes: (A) Thai version (r=0.60, P<0.001) (B) Northern Thai dialect version (r=0.77, P<0.001).Abbreviations: SGRQ, St George’s Respiratory Questionnaire; CAT, COPD Assessment Test.
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f2-copd-10-541: Correlation between SGRQ and CAT scores.Notes: (A) Thai version (r=0.60, P<0.001) (B) Northern Thai dialect version (r=0.77, P<0.001).Abbreviations: SGRQ, St George’s Respiratory Questionnaire; CAT, COPD Assessment Test.

Mentions: The Thai version showed moderate correlation whereas the northern Thai dialect version showed strong correlation with SGRQ (r=0.60 and 0.77, P<0.001, respectively; Figure 2A and B). Each domain of CAT showed significant correlations with those of SGRQ (Table 2). Symptom domain correlations were moderate for both versions (r=0.57 and 0.55, respectively). Functional and impact domains of the northern Thai dialect version showed strong correlation (r=0.71 and 0.71, respectively), whereas those of the Thai version showed moderate correlation only (r=0.59 and 0.53, respectively) (Table 2).


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

Pothirat C, Chaiwong W, Phetsuk N, Liwsrisakun C, Bumroongkit C, Deesomchok A, Theerakittikul T, Limsukon A - Int J Chron Obstruct Pulmon Dis (2015)

Correlation between SGRQ and CAT scores.Notes: (A) Thai version (r=0.60, P<0.001) (B) Northern Thai dialect version (r=0.77, P<0.001).Abbreviations: SGRQ, St George’s Respiratory Questionnaire; CAT, COPD Assessment Test.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4362659&req=5

f2-copd-10-541: Correlation between SGRQ and CAT scores.Notes: (A) Thai version (r=0.60, P<0.001) (B) Northern Thai dialect version (r=0.77, P<0.001).Abbreviations: SGRQ, St George’s Respiratory Questionnaire; CAT, COPD Assessment Test.
Mentions: The Thai version showed moderate correlation whereas the northern Thai dialect version showed strong correlation with SGRQ (r=0.60 and 0.77, P<0.001, respectively; Figure 2A and B). Each domain of CAT showed significant correlations with those of SGRQ (Table 2). Symptom domain correlations were moderate for both versions (r=0.57 and 0.55, respectively). Functional and impact domains of the northern Thai dialect version showed strong correlation (r=0.71 and 0.71, respectively), whereas those of the Thai version showed moderate correlation only (r=0.59 and 0.53, respectively) (Table 2).

Bottom Line: The validity was evaluated by the degree of correlation with St George's Respiratory Questionnaire (SGRQ) using Pearson's correlation.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.

View Article: PubMed Central - PubMed

Affiliation: Division of Pulmonary, Critical Care and Allergy, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.

ABSTRACT

Background: 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.

Methods: 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.

Results: 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.

Conclusion: 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.

Show MeSH
Related in: MedlinePlus