The reliability and validity of the Chinese version of the comprehensive assessment of acceptance and commitment therapy processes in individuals with nasopharyngeal carcinoma: A cross-sectional study.

OBJECTIVES: The increasing application of Acceptance and Commitment Therapy (ACT) in oncology suggests that psychological flexibility may be a crucial factor in the treatment of individuals with cancer, rehabilitation and well-being. The Chinese version of the Comprehensive Assessment of Acceptance and Commitment Therapy Processes (CompACT-C) was found to have acceptable reliability and validity among individuals with breast cancer; however, its psychometric properties have not been verified among individuals with nasopharyngeal carcinoma (NPC). METHODS: Convenience sampling was used to recruit participants diagnosed with NPC from a Grade III Level A hospital in Guangdong Province, China. The patients provided general demographic data and completed the CompACT-C and the Acceptance and Action Questionnaire-II (AAQ-II). The construct validity of the CompACT-C was tested using confirmatory factor analysis based on its original three-factor structure, and its internal consistency and 2-week test-retest reliability were evaluated. Convergent validity was determined by analyzing the correlation between the CompACT-C and AAQ-II. RESULTS: A total of 310 individuals with NPC (age: 47.88 ± 11.45 years) completed the questionnaire and were included in the data analysis. The majority of patients (75.2%) were male. The three-factor structure of the CompACT-C initially showed a poor model fit (RMSEA = 0.073, CFI = 0.766, SRMR = 0.109). After removing items OE5, OE8, and OE9 and modifying item OE7 (reassignment from the "Openness to Experience" to the "Behavioural Awareness" dimension), the fit improved [structural equation modeling results: χ2 = 338.999, df = 167, NC (χ2/df) = 2.030, RMSEA = 0.048, CFI = 0.918, TLI = 0.906, SRMR = 0.071]. The scale demonstrated satisfactory internal consistency (Cronbach's α = 0.780) and convergent validity with the AAQ-II (r = -0.570, p < 0.001) in this sample of individuals with NPC. CONCLUSIONS: The CompACT-C demonstrated acceptable reliability and validity for assessing psychological flexibility in individuals with NPC, supporting its use as an assessment instrument in future research.