Abstract: Objective　To evaluate the quality of bowel preparation in children for colonoscopy and to explore the influencing factors. Methods　A total of 198 children who underwent colonoscopy between August 1, 2017 and March 31, 2018 were included prospectively. According to the Boston Bowel Preparation Scale (BBPS), the quality of bowel preparation was evaluated, and the general information of the child and the relevant situation of the bowel preparation process were collected. Multivariate logistic regression analysis was preformed to analyze the influencing factors of bowel preparation quality. Results Among the 198 children (116 males and 82 females) with an average age of (8.70±2.87) years, a total BBPS score was (7.45±1.31). The cleanliness degree of bowel preparation was excellent in 104 cases (52.5%), good in 74 cases (37.4%), and poor in 20 cases (10.1%). The adverse reactions occurred in 90 cases (45.5%). There were statistically significant differences in the history of constipation, the number of stools after taking medicine, the last stool characteristics, adverse reactions, and the exercise before, during and after taking medicine among the three groups (P<0.05). Logistic regression analysis found that less frequency of stools after taking medicine, the last stool property (mushy stool, dark yellow or brown with residue or light yellow water), no exercise during taking laxatives and not taking laxatives completely were independent factors reducing the cleanliness of bowel preparation (P<0.05). Conclusions　In order to improve the quality of bowel preparation, it is necessary to identify the relevant factors that affect the quality of bowel preparation in early stage and take corresponding interventions in time.

Key words: child;　fibrocolonoscopy;　bowel preparation;　influencing factor