Abstract: Objective To analyze the relationship between precocious puberty and dietary exposure history of children aged 4 to 10 years in Ankang,and provide scientific basis for the prevention of children with precocious puberty.Methods Totally 200 children aged 4 to 10 years with precocious puberty admitted to the pediatric department of medical and health institutions in Ankang from July 2022 to June 2023 were selected as the case group,and 200 normal children aged 4 to 10 years in kindergartens and primary schools in the same region were selected as the control group during the same period.A survey was conducted using a dietary frequency and related behavior questionnaire.Results There was no statistically significant difference in gender,age,or age composition between 200 precocious children and 200 normal children aged 4 to 10 years surveyed in Ankang(P>0.05).The proportion of children often taking nutritional supplements,foods with high levels of estrogen,off-season fruits,off-season vegetables,thick flavored sorghum,foods with high levels of trace element zinc,foods with high levels of preservatives,pigments and additives,and foods packaged in plastic in case group was statistically higher than that in control group(P<0.01).There was no statistically significant difference between the two groups in terms of frequent consumption of dairy products(P>0.05).The results of logistic regression analysis showed that nutritional supplements and foods with high levels of trace element zinc were factors affecting precocious puberty in children（P＜0.05）, All other factors have no statistical significance（P＞0.05）.Conclusion The incidence of precocious puberty in children aged 4 to 10 years in Ankang is related to dietary structure.Nutritional supplements,foods with high levels of estrogen,off-season vegetables,thick flavored sorghum,foods with high levels of trace element zinc,foods with high levels of preservatives,pigments and additives,and foods packaged in plastic may increase the risk of precocious puberty.Governments,schools,and families should pay attention to the balance of children′s diets and enhance health education to help children establish a balanced dietary pattern.

Key words:

Precocious puberty, Dietary factor, Correlation, Children