Objective To investigate the prevalence of abdominal obesity among primary and secondary school students in Zhengzhou, so as to provide reference for the prevention and control of overweight and obesity in urban students. Methods A stratified cluster sampling method was performed to select 6 859 students aged 7 - 15 years in Zhengzhou in 2019. Questionnaire survey and physical examination were conducted among these children. Body mass index(BMI), waist circumference(WC) and waist-to-height ratio(WHtR) were used to analyze the prevalence of overweight, obesity and abdominal obesity among primary and secondary school students. The t test, completely random design χ2 test, paired χ2 test and weighted Kappa consistency tests were performed with the R 4.0.3 software. Results The overall detection rate of overweight and obesity based on the BMI standard was 14.4% and 10.3%, respectively. The detection rate of abdominal obesity based on WC and WHtR standards was 19.4% and 14.3%, respectively. The detection rates of obesity and abdominal obesity in boys were higher than that in girls under the three criteria(P<0.01). The detection rate of abdominal obesity in students aged 10 - 15 years were significantly higher than that in students aged 7 - 9 years(P<0.01). For the screening of abdominal obesity in primary and middle school students, the Kappa value of WC standard vs. WHtR standard was 0.73, among which, the Kappa values of boys aged 7 - 9 years, 10 - 12 years and 13 - 15 years was 0.84, 0.85 and 0.76, respectively, showing a high degree of consistency. Conclusions The prevalence of overweight, obesity and abdominal obesity among 7- to 15-year-old students in Zhengzhou is not optimistic, especially for boys and primary school students. Comprehensive intervention should be carried out as soon as possible.
Key words
primary and secondary school students /
abdominal obesity /
screening standard /
overweight /
obesity
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