COMPARATIVE STUDY
JOURNAL ARTICLE
OBSERVATIONAL STUDY
VALIDATION STUDY
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Validation of the chinese version of the EORTC QLQ-CR29 in patients with colorectal cancer.

AIM: To assess the validity and reliability of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Colorectal Cancer 29 (EORTC QLQ-CR29) in Chinese patients with colorectal cancer (CRC).

METHODS: From March 2014 to January 2015, 356 patients with CRC from four different hospitals in China were enrolled in the study, and all patients self-administered the EORTC QLQ-CR29 and the quality of life core questionnaire (EORTC QLQ-C30). Evaluation of the scores was based on the Karnofsky Performance Scale (KPS). The reliability and validity of the questionnaires were assessed by Cronbach's α coefficient, the Spearman correlation test and Wilcoxon rank sum test.

RESULTS: The EORTC QLQ-CR29 showed satisfactory reliability (α > 0.7), although the urinary frequency and blood and mucus in stool dimensions had only moderate reliability (α = 0.608). The multitrait scaling analyses showed good convergent ( r > 0.4) and discriminant validity. Significant differences were obtained for each item in the different KPS subgroups (KPS ≤ 80; KPS > 80). Body image and most single-item dimensions showed statistically significant differences in patients with a stoma compared with the rest of the patients.

CONCLUSION: The EORTC QLQ-CR29 exhibits high validity and reliability in Chinese patients with CRC, and can therefore be recommended as a valuable tool for the assessment of quality of life in these patients.

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