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Background The grazing behavior after bariatric surgery is significantly related to postoperative weight regain, and its incidence will increase with the extension of time after surgery. So it is particularly important to early detect and accurately evaluate the grazing behavior of patients undergoing bariatric surgery. At present, the assessment tools for grazing behavior in these patients in China are still lacking. Objective To translate the Repetitive Eating Questionnaire〔Rep (eat) -Q) 〕into Chinese and evaluate its reliability and validity among patients undergoing bariatric surgery. Methods The Brislin's model of translation was adopted for translation. We developed the Chinese version of Rep (eat) -Q following the process of translation of the English version of the Rep (eat) -Q, back translation, expert review and a pilot study. On 2022-08-31, patients undergoing bariatric surgery admitted to the bariatric follow-up clinic of the First Affiliated Hospital with Nanjing Medical University from March to August 2022 were selected for the study using convenience sampling. Then we used the general information questionnaire, Chinese version of Rep (eat) -Q and the 21-item Three-Factor Eating Questionnaire (TFEQ-R21) to conduct a survey among 294 patients undergoing bariatric surgery to test the reliability and validity of the Chinese version of Rep (eat) -Q. Results According to the score of the Chinese version of Rep (eat) -Q, these patients were divided into high-score group (n=79) and low-score group (n=78) by the critical ratio. High-score group scored higher in each item of the Chinese version of Rep (eat) -Q compared with the low-score group (P