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| Association between obesity types and blood pressure among junior middle school students in Shanghai |
| YAN Qiong, LUO Chunyan, ZHOU Yuefang, YANG Dongling, QI Wenjuan, FENG Xiaogang |
| Institute of Child and Adolescent Health, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China |
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Abstract Objective To analyze the association between blood pressure and obesity types among junior middle school students in Shanghai, and to provide clues for the prevention and control of hypertension among children and adolescents. Methods Survey on obesity and related factors among students was performed in five districts of Shanghai in 2018. A total of 1 704 junior middle school students were enrolled to explore the relationship between different types of obesity and high blood pressure. Results The overall obesity prevalence rate of middle school students in Shanghai was 23.59%. The prevalences of peripheral obesity，abdominal obesity and mixed obesity were 0.88%，10.50% and 12.21%，respectively. There were significant differences in gender (χ2=38.17，P<0.01)，age (P<0.01) and place of residence (χ2=17.86，P<0.01) in the subjects with different types of obesity. The overall prevalence of hypertension was 4.46%. There were significant differences in age (χ2=18.42，P<0.01)，place of residence (χ2=9.36，P<0.01) and obesity types (χ2=24.28，P<0.01) in the subjects with high blood pressure. Significant difference was found in both the systolic blood pressure (SBP) and diastolic blood pressure (DBP) in students with different obesity types (SBP: mixed obesity>abdominal obesity>peripheral obesity>normal [mixed obesity vs. other groups，P<0.05]，DBP: mixed obesity>peripheral obesity>abdominal obesity>normal [mixed obesity vs. normal，abdominal obesity vs. normal，P<0.05]. Multivariate logistic regression showed that the greatest risk of hypertension was mixed obesity，followed by abdominal obesity，with OR values of 3.90 and 2.12，respectively. Conclusion Mixed obesity and abdominal obesity are closely related to hypertension in middle school students. Prevention and treatment of adolescent hypertension should place priority on obesity prevention.
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