• Postgrad Med J · Nov 2020

    Relationship between serum uric acid level and all-cause and cardiovascular mortality in population with obesity.

    • Jie Li, Jia-Yi Huang, Lin Liu, Kenneth Lo, Shuo Sun, Chao-Lei Chen, Bin Zhang, Ying Qing Feng, and Yu-Qing Huang.
    • Department of Cardiology, Guangdong Cardiovascular Institute, Hypertension Research Laboratory, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, South China University of Technology School of Medicine, Guangzhou, China.
    • Postgrad Med J. 2020 Nov 1; 96 (1141): 660-665.

    BackgroundWe aimed to investigate the association between serum uric acid (SUA) and all-cause or cardiovascular mortality among participants with obesity.MethodAll participants were included from the 1999 to 2014 National Health and Nutrition Examination Survey with follow-up mortality assessment through 31 December 2015. Cox proportional hazards models were built to estimate adjusted HRs and 95% CIs for mortality according to baseline uric acid in quartiles. Obesity was defined as body mass index ≥30 (kg/m2). Generalised additive model (GAM) and two-piecewise linear regression models were performed to explore any non-linearity in associations.ResultsThere were 12 637 adults with obesity eligible for analysis. There were 999 (7.91%) all-cause and 147 (1.16%) cardiovascular mortality occurred during the mean follow-up of 98.11 months. Comparing with the lowest quartile of SUA, the highest SUA group did not have significant association with all-cause (HR 1.08, 95% CI 0.76 to 1.52) and cardiovascular mortality (HR 1.63, 95% CI 0.58 to 4.53) after adjusting for various confounding factors. GAM and two-piecewise linear regression model demonstrated a non-linearly relationship between SUA and all-cause mortality, and the corresponding cut-off point was 6.5 mg/dL. However, there is no significant relationship between uric acid and cardiovascular death on both sides of the cut-off value of 6.1 mg/dL.ConclusionsSUA showed a J-shaped relationship with all-cause mortality, but no significant with cardiovascular mortality in adults with obesity.© Author(s) (or their employer(s)) 2020. No commercial re-use. See rights and permissions. Published by BMJ.

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