Objective To analyze the prevalence of abdominal obesity in Chinese Han students aged 7~18 in 2010 and 2014,and to explore the influencing factors of abdominal obesity. Methods Han students aged 7~18 years from Chinese National Survey on Students' Constitution and Health in 2010 and 2014 were included. After screening students lacking waist or height information and students with abnormal waist or waist-to-height ratio,finally 228 562 students were analyzed. Waist cut-off standards in China and waist-to-height ratio cut-off (≥0.5) were used to classify abdominal obesity. Questionnaires were used to collect information about influencing factors. t-test and χ2 test were used to analyze the difference of abdominal obesity in 2010 and 2014,and Logistic regressive model was used to analyze the influencing factors. Results The average waist and waist-to-height ratio of Chinese Han students aged 7~18 years in 2010 were (64.96±9.79)cm and 0.428±0.048. The average waist and waist-to-height ratio in 2014 were (65.90±10.07)cm and 0.434±0.051, which were higher than those in 2010 (P<0.001). The prevalence of abdominal obesity of Chinese Han students significantly increased from 2010 to 2014 (by waist cut-off: 13.84%<17.13%,by waist-to-height ratio: 8.91%<11.23%,both P<0.001). In 2014,the prevalence of abdominal obesity among boys was higher than that of girls,urban students higher than rural students,students from middle and eastern China was higher than those from western China,students in low age higher than the older ones (P<0.001). Logistic regression analysis showed that boys (OR=2.37,95%CI: 2.26~2.48),urban area (OR=1.25,95%CI: 1.20~1.31),eastern and middle regions (east: OR=1.29,95%CI: 1.22~1.37; middle: OR=1.08,95%CI: 1.02~1.15),7~9 and 10~12 years (7~9: OR=1.89,95%CI: 1.77~2.03; 10~12: OR=2.07,95%CI: 1.89~2.26),having breakfast less than 3~5 times/per week (OR=1.17,95%CI: 1.07~1.28),unwillingness for long-distance running (OR=1.72,95%CI: 1.64~1.80),TV time ≥1 hour/per day (OR=1.06,95%CI: 1.01~1.13) were the risk factors of abdominal obesity(all P<0.05 or<0.01). Sleep duration,exercise duration/per day,homework duration/per day were not related to the prevalence of abdominal obesity (all P>0.05). Conclusions The prevalence of abdominal obesity of Chinese Han students aged 7~18 years significantly increased from 2010 to 2014.Abdominal obesity in studerts can be affected by multiple influencing factors, and thus comprehensive intervention for obesity should be factor-targeted.
Key words
Chinese Han students /
abdominal obesity /
influencing factors /
waist /
waist-to-height ratio
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