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Updated: Aug 15, 2025

Assessment of Child Anthropometry in a Large Epidemiologic Study
Published on: February 2, 2017
The dose-response relationship between BMI and hypertension based on restricted cubic spline functions in children
Yani Wang1, Congcong Min2, Xiaoyan Song3
1Qingdao Municipal Center for Disease Control and Prevention, Qingdao, China.
Background:
A high body mass index (BMI) is a major risk factor for hypertension. The purpose of this study was to investigate the association between the BMI and hypertension in children and adolescents.
Methods:
We analyzed physical examination data from 29,810 students aged 6-14 years old. A restricted cubic spline (RCS) function was used to investigate the dose-response relationship between the BMI and hypertension.
Results:
The prevalence of hypertension was 9.91%, followed by 11.71% in males and 7.9% in females, respectively. Compared to the normal weight group, the odds risk (OR) for hypertension in the overweight group was 1.729, and the OR for hypertension in the obesity group was 3.089. After adjusting for potential confounders, the adjusted ORs were 1.620 [95% confidence interval (CI): 1.457-1.800] in the overweight group and 3.092 (95% CI: 2.824-3.385) in the obesity group. According to the multivariate RCS regression analysis, there was a significant non-linear dose-response association between the BMI and the risk of hypertension (all P-values for non-linear < 0.001).
Conclusion:
The dose-response relationship analysis showed that the association strength of hypertension increased non-linearly along with the continuous change of BMI in children and adolescents.
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