Abstract: Objective To analyze the knowledge, attitude, and practice （KAP）of dietary control among Helicobacter pylori （Hp）infected persons in Zhangjiakou City, and to explore the related influencing factors. Methods Using multi-stage stratified sampling, 10 communities in Zhangjiakou were randomly selected from October 2022 to March 2023, and at least 100 cases of Hp infection were recruited in the selected communities. Questionnaire survey was used to collect the basic information and KAP of dietary control of the respondents. Descriptive epidemiological analysis was used to analyze the status of KAP of dietary control, and univariate and multivariate analyses were used to analyze the influencing factors. Results A total of 983 Hp infected persons were included in this study, and the score of dietary control knowledge dimension was （34.32 ± 3.68）, the score of attitude dimension was （13.03 ± 2.60）, and the score of practice dimension was （23.92 ± 3.29）. Multiple linear regression analysis showed that strongly positive Hp infection （β′=0.308）, college degree or above （β′=0.263）, complicated with gastrointestinal diseases （β′=0.109）, combined with underlying diseases （β′=0.118）, family history of Hp infection （β′=0.292）, and accepted dietary recommendations （β′=0.345）were influencing factors of knowledge dimension score; strongly positive Hp infection （β′=0.216）, college degree or above （β′=0.197）, complicated with gastrointestinal diseases （β′=0.095）, combined with underlying diseases （β′=0.262）, family history of Hp infection （β′=0.137）, accepted dietary recommendations （β′=0.244）, knowledge dimension score （β′=0.294）were influencing factors of attitude dimension score; strongly positive Hp infection （β′=0.219）, college degree or above （β′=0.137）, in-service （β′=0.185）, complicated with gastrointestinal diseases （β′=0.117）, combined with underlying diseases （β′=0.110）, family history of Hp infection （β′=0.131）, accepted dietary recommendations （β′=0.230）, knowledge dimension score （β′=0.381）, attitude dimension score （β′=0.126）were influencing factors of practice dimension score. Conclusions The KAP level of dietary control among Hp infected persons is low, which is affected by many factors, such as infection degree, education level, gastrointestinal diseases, and underlying diseases. Health education, dietary guidance, and other intervention measures can be taken to improve the KAP level of dietary control among Hp infected persons.

Key words: Helicobacter pylori, Dietary control, Knowledge, attitude, and practice