Background The spatial differences and related factors of overweight and obesity among schoolchildren in Shandong province were analyzed, aiming to provide scientific basis for prevention of childhood obesity and the adoption of targeted intervention policies.
Methods The sample came from Shandong province's physical examination data in 2017. A total of 10.27 million schoolchildren aged 6-18 years were included. ArcGIS software (hot spot analysis) was used to explore the spatial differences, and regional influencing factors were analyzed by multinomial logistic regression.
Results The prevalence of overweight and obesity among schoolchildren aged 6-18 years were 17.93% and 6.79%, respectively. Moreover, boys/girls, urban/rural areas both showed that the former rate was higher than the latter, and the 9-11 age group was confirmed to have the highest prevalence. Regional distribution illustrated that, in Shandong province, the areas with high prevalence of overweight and obesity were mainly concentrated in the central, northern and eastern parts, and the hot spots clusters were located in Yantai and Weihai, while the low-value areas were aggregated in the western (boys) and southern (girls) regions. Further exploration revealed that total retail sales of consumer goods (CGTRS) and per capita disposable income (PCDI) were confirmed as risk factors for regional obesity level, while number of full-time teachers (FTT) was a protective factor.
Conclusions The spatial differences of overweight and obesity are statistically significant and influenced by some regional factors, suggesting that relevant departments should adopt targeted interventions when relevant strategies are made.