Translation and Validation of a Vietnamese Version of the Colorectal Cancer Subscale for the Functional Assessment of Cancer Therapy - Colorectal Questionnaire

Abstract

Introduction There is a need for a validated Vietnamese translation of the colorectal cancer subscale (CCS) of the functional assessment of cancer therapy–colorectal (FACT-C) questionnaire to assess colorectal cancer-specific concerns of Vietnamese persons with colorectal cancer post-surgery. Objectives This study aims to translate and validate the CCS of FACT-C questionnaire in Vietnamese persons with colorectal cancer post-surgery. Methods The nine-item CCS was translated following the functional assessment of chronic illness therapy (FACIT) translation methodology guidelines. Psychometric properties of a Vietnamese version of the CCS were evaluated with a sample of 135 participants who were randomly selected from three hospitals in Vietnam, utilizing a multistage sampling method. Construct validity was examined through confirmatory factor analysis (CFA), and reliability was assessed using Cronbach's α coefficients. These measures aimed to validate the psychometric properties of the Vietnamese nine-item CCS version. Descriptive statistics were used to analyze participant demographics with SPSS. Results The translated version demonstrated equivalence to the original English version. CFA results for the CCS Vietnamese version indicated that all 9 items were consistent with a unidimensional questionnaire (χ2 = 69.669, p > .05, df = 27, χ2/df = 2.58, RMSEA = .074, CFI = .917, TLI = .901, SRMR = .057). The Cronbach's α coefficient was .86, indicating high reliability. The Correlated Item-Total Correlation for the 9 items ranged from .39 to .76. Conclusion The nine-item CCS Vietnamese version demonstrated appropriate translation, establishing its validity and reliability in measuring colorectal cancer-related concerns within the health-related quality of life among Vietnamese persons post-surgery.