Reliability and Validity of Kansas City Cardiomyopathy Questionnaire in Arabic Patients with Chronic Heart Failure

Area of Science:

• Cardiology
• Health Services Research
• Psychometrics

Background:

• The Kansas City Cardiomyopathy Questionnaire (KCCQ) is a key tool for evaluating health-related quality of life (HRQoL) in chronic heart failure (CHF) patients.
• Existing KCCQ validation has primarily focused on English-speaking populations.
• There is a need to establish the reliability and validity of the KCCQ for Arabic-speaking CHF patients.

Purpose of the Study:

• To assess the reliability and validity of an Arabic translation of the KCCQ.
• To determine if the Arabic KCCQ is a suitable instrument for measuring HRQoL in Arabic patients with CHF.

Main Methods:

• A cohort of 101 Arabic patients with CHF completed the Arabic KCCQ, the Minnesota Living with Heart Failure (MLHF) questionnaire, and a six-minute walk test (6MWT).
• Test-retest reliability was assessed by having patients complete the KCCQ again upon return, along with a global rating of change scale.
• Internal consistency, test-retest reliability, and construct validity (correlation with MLHF and 6MWT) were analyzed.

Main Results:

• The Arabic KCCQ demonstrated excellent internal consistency (Cronbach's alpha = 0.97) and high test-retest reliability (ICC = 0.95).
• Significant correlations were found between the Arabic KCCQ and both the MLHF questionnaire (r = -0.57) and the 6MWT (r = 0.70), supporting construct validity.
• The study included 101 Arabic-speaking CHF patients with a mean age of 55 years.

Conclusions:

• The Arabic version of the KCCQ is a reliable and valid instrument for assessing HRQoL in Arabic-speaking patients with CHF.
• The validated Arabic KCCQ can be confidently implemented in routine clinical practice for this population.
• This facilitates better HRQoL assessment and management for Arabic-speaking CHF patients.