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- Title
Validation and clinical interpretation of the St George's respiratory questionnaire for COPD (SGRQ-C) after adaptation to Malaysian language and culture, in patients with COPD.
- Authors
Rehman, Anees ur; Hassali, Mohamed Azmi Ahmad; Harun, Sabariah Noor; Abbas, Sameen; Muneswarao, Jaya; Ali, Irfhan Ali Bin Hyder; Hussain, Rabia
- Abstract
<bold>Background: </bold>Cultural differences affect the administration and results of health status questionnaires. "Cross cultural adaptation" ensures retention of psychometric properties such as validity and reliability at an item and/or scale level.<bold>Objective: </bold>To develop a Malaysian version of St George's respiratory COPD specific questionnaire (SGRQ-CM), to evaluate the full spectrum of psychometric properties (reliability, validity and responsiveness), to test the factor structure and to assess minimum clinically important difference for the SGRQ-CM, to be used in population of Malaysia.<bold>Methodology: </bold>SGRQ-C was translated to Bahasa Malaysia using a standard protocol. 240 COPD patients were included in the study. All patients were followed-up for six months. Construct validity, internal consistency, item convergent validity, test-retest ability, responsiveness, factor analysis and MCID of the Malaysian version of SGRQ-C to be used in population of Malaysia were evaluated.<bold>Results: </bold>The Cronbach alpha coefficient and intraclass correlation coefficients (ICC) for SGRQ-CM were reported as 0.87, and 0.88 respectively. Correlation of SGRQ-CM with CAT, EQ-5D-5 L, mMRC dyspnea scales and FEV1%predicted were reported as 0.86, - 0.82, 0.72 and - 0.42 respectively. Correlation coefficient between the subscales and other clinical and health status measures ranged from r = - 0.35 to r = - 0.87. The MCID was reported as 5.07 (- 2.54-12.67).<bold>Conclusion: </bold>The Malaysian version of SGRQ-C has a good psychometric property comparable to those of the original version and has a strong evidence of validity, reliability and responsiveness towards disease severity in Malaysian COPD patients. It can be recommended as a reliable quality of life measure for future research.
- Subjects
MALAYSIA; OBSTRUCTIVE lung diseases; INTRACLASS correlation; FACTOR structure; FACTOR analysis; COMPUTER adaptive testing; CULTURAL adaptation; TEST validity
- Publication
Health & Quality of Life Outcomes, 2020, Vol 18, Issue 1, p1
- ISSN
1477-7525
- Publication type
journal article
- DOI
10.1186/s12955-020-01393-1