Cross-Cultural Adaptation, Reliability and Validity Study of the Persian Version of the Clinical COPD Questionnaire
The clinical COPD questionnaire (CCQ) has been developed to measure the health status of COPD patients. The aim of this study was to translate CCQ into the Persian language and assess the validity and reliability of the translated version. We used a forward-backward procedure to translate the questionnaire. In a cross-sectional study 100 COPD patients and 50 healthy subjects over 40 years old were selected to assess the reliability and construct validity of the instrument. The face and content validity were used for the questionnaire validity. Validity was examined in a population of patients with COPD, using the Persian validated version of the St George's Respiratory Questionnaire (PSGRQ). In order to assess the questionnaire’s reliability, the Intraclass correlation coefficient (ICC) and Cronbach’s alpha were calculated. Test-retest reliability was tested by re-administering the Persian version of the CCQ (PCCQ) after 1 week. Test-retest carry out of data demonstrates that the PCCQ has excellent reliability (ICC for all 3 domains were higher than 0.9). Internal consistency was found by Cronbach’s alpha to be 0.96, 0.94, 0.97, and 0.98 for the symptom, mental state, functional state and total scores respectively. In addition, the correlation between the components of PCCQ and PSGRQ showed satisfactory construct validity. Analyzing the data from healthy subjects and patients divulged that the PCCQ has acceptable discriminant validity. In general, the PCCQ had satisfactory reliability and validity for assessing health-related quality of life status of Iranian COPD patients.
Celli B, MacNee W, Agusti A, Anzueto A, Berg B, Buist A, et al. Standards for the diagnosis and treatment of patients with COPD: a summary of the ATS/ERS position paper. European Respiratory Journal 2004; 23(6): 932-946.
ZuWallack R. How are you doing? What are you doing? Differing perspectives in the assessment of individuals with COPD. COPD: Journal of Chronic Obstructive Pulmonary Disease 2007; 4(3): 293-297.
Reardon J Z, Lareau S C, ZuWallack R. Functional status and quality of life in chronic obstructive pulmonary disease. The American journal of medicine 2006; 119 (10 Suppl 1): 32.
Fabbri L, Hurd S. Global strategy for the diagnosis, management and prevention of COPD: 2003 update. European Respiratory Journal 2003; 22(1): 1-1.
Pauwels RA, Buist AS, Calverley PM, Jenkins CR, Hurd SS. Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease. American journal of respiratory and critical care medicine 2012;163(5).
Vestbo J, Hurd SS, Rodriguez‐Roisin R. The 2011 revision of the global strategy for the diagnosis, management and prevention of COPD (GOLD)–why and what? The clinical respiratory journal 2012;6(4):208-14.
Weldam SW, Schuurmans MJ, Liu R, Lammers J-WJ. Evaluation of Quality of Life instruments for use in COPD care and research: a systematic review. International journal of nursing studies 2013;50(5):688-707.
Tafti SF, Cheraghvandi A, Marashian M, Emami H, Mokri B. Measurement of the Validity and Reliability of the Persian Translation of the Saint George Respiratory Questionnaire for Patients with Chronic Obstructive Pulmonary Disease. The open respiratory medicine journal 2009;3:107.
Van Der Molen T, Willemse BWM, Schokker S, Ten Hacken NHT, Postma DS, Juniper EF. Development, validity and responsiveness of the Clinical COPD Questionnaire. Health and Quality of Life Outcomes 2003;1(1):13.
Kocks JW, Tuinenga M, Uil S, Van den Berg J, Stahl E, Van der Molen T. Health status measurement in COPD: the minimal clinically important difference of the clinical COPD questionnaire. Respir Res 2006;7(62):1465-993.
Damato S, Bonatti C, Frigo V, Pappagallo S, Raccanelli R, Rampoldi C, et al. Validation of the Clinical COPD questionnaire in Italian language. Health Qual Life Outcomes 2005;3(1):9.
Stallberg B, Nokela M, Ehrs P-O, Hjemdal P, Jonsson EW. Validation of the clinical COPD Questionnaire (CCQ) in primary care. Health Quality of Life Outcomes 2009;7:26.
Papadopoulos G, Vardavas CI, Limperi M, Linardis A, Georgoudis G, Behrakis P. Smoking cessation can improve quality of life among COPD patients: validation of the clinical COPD questionnaire into Greek. BMC pulmonary medicine 2011;11(1):13.
Herbert C, Nambiar V, Rao M, Ravindra S. Concurrent Validity of Clinical Chronic Obstructive Pulmonary Disease (COPD) Questionnaire (CCQ) in South Indian Population. Indian Journal of Physiotherapy & Occupational Therapy-An International Journal 2013;7(1):270-3.
Acquadro C, Conway K, Hareendran A, Aaronson N. Literature Review of Methods to Translate Health‐Related Quality of Life Questionnaires for Use in Multinational Clinical Trials. Value in Health 2008;11(3):509-21.
Jones PW, Quirk FH, Baveystock CM, Littlejohns P. A self-complete measure of health status for chronic airflow limitation: the St. George's Respiratory Questionnaire. American Review of Respiratory Disease 1992;145(6):1321-7.
Jones PW, Quirk F, Baveystock C. The St George's respiratory questionnaire. Respiratory medicine 1991;85:25-31.
Jones PW. St. George's respiratory questionnaire: MCID. COPD: Journal of Chronic Obstructive Pulmonary Disease 2005;2(1):75-9.
Ferrer M, Alonso J, Prieto L, Plaza V, Monsó E, Marrades R, et al. Validity and reliability of the St George's Respiratory Questionnaire after adaptation to a different language and culture: the Spanish example European Respiratory Journal. 1996;9(6):1160-6.
Ferrer M, Villasante C, Alonso J, Sobradillo V, Gabriel R, Vilagut G, et al. Interpretation of quality of life scores from the St George's Respiratory Questionnaire. European Respiratory Journal 2002;19(3):405-13.
Terwee CB, Bot SD, de Boer MR, van der Windt DA, Knol DL, Dekker J, et al. Quality criteria were proposed for measurement properties of health status questionnaires. Journal of clinical epidemiology 2007;60(1):34-42.
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