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. 2021 Mar;10(3):541–551. doi: 10.21037/tp-20-325

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2021 Translational Pediatrics. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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The restricted cubic spline for the association between body composition indexes (measured by BMI, FMI and FFMI) and difference in blood pressure (SBP and DBP). The lines represent adjusted difference based on restricted cubic splines for the level of body composition in multi-variable linear and non-linear regression models. Adjusted factors were age, sex and residential areas. BMI, body mass index, kg/m²; FMI, fat mass index, kg/m²; FFMI, fat free mass index, kg/m²; SBP, systolic blood pressure, mmHg; DBP, diastolic blood pressure, mmHg. The solid lines represent the predicted value, and the dash lines were their 95% confidence interval.