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. 2018 Jan 30;24:1. doi: 10.1186/s40885-018-0087-3

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Correlation between serum uric acid and blood pressure status of participants categorized by body mass index. In body mass index (BMI) < 21.0 kg/m², serum uric acid correlated positively with both systolic blood pressure (SBP) and diastolic blood pressure (DBP) (r = 0.112, p = 0.100 and r = 0.163, p = 0.016, respectively), but in BMI ≥21.0 kg/m² serum uric acid correlated negatively with both SBP and DBP (BMI 21-25 kg/m², r = − 0.108, p = 0.024 and r = − 0.022, p = 0.651; BMI ≥25.0 kg/m², r = − 0.178, p = 0.023 and r = − 0.064, p = 0.421, respectively). Analysis of covariance showed that three regression lines in each graph were significantly different (SBP, F = 8.139, P = 0.004 and DBP, F = 5.199, P = 0.023, respectively)