%0 Journal Article %A DENG Yu-kun %A HE Yue-hui %A SHANG Ran %A SHI Wei-jia %A SUN Hui-hui %A WAN Nai-jun %A ZHANG Jin %A ZHANG Tian %T Study on bone mineral density level and its influencing factors in obese school-age children %D 2020 %R 10.11852/zgetbjzz2020-0452 %J Chinese Journal of Child Health Care %P 1271-1275 %V 28 %N 11 %X Objective To investigate changes and influencing factors of bone mineral density (BMD) in school-aged children with obesity. Methods A total of 96 school-age children (aged 6 to12 years) who visited the pediatric department of Beijing Jishuitan Hospital from October 2018 to October 2019, were enrolled in this study to complete a questionnaire survey.A series of physical examination were performed for these participants, including body composition, BMD of both distal ulnar and radius, abdominal ultrasound, blood level of lipids, calcium, vitamin D and fasting insulin.SPSS 25.0 software was used for statistical analysis. Results The average age of 96 children was (9.10±1.88) years old.There was no significant difference on BMD between left and right distal ulnar and radius, or between boys and girls (P>0.05).BMD of 10- to 12-year-old children was significantly higher than that in children aged 6-7 years and 8-9 years(H=13.917,P<0.05).Age and muscle mass were both positively correlated with BMD of obese school-age children (r=0.359, 0.315, P<0.05), while the levels of total cholesterol, triglyceride, low density lipoprotein-cholesterol and calcium were negatively related to BMD (r=-0.311, -0.203, -0.246, -0.207, P<0.05).Milk and dairy products, carbonated beverage, moderate exercise, sunlight exposure and sedentary time were found to be influencing factors of BMD (P<0.05).Multiple linear regression analysis showed that sunlight exposure time was an independent factor affecting BMD(β=0.036, t=2.836, P< 0.05). Conclusion BMD increases with age for obese school-aged children.Dietary and environmental factors are important contributors to ensure the healthy growth of BMD. %U https://manu41.magtech.com.cn/Jwk_zgetbjzz/EN/10.11852/zgetbjzz2020-0452