Exploration of the association between serum uric acid and testosterone in adult males: NHANES 2011-2016.

Background: Previous studies have suggested that the possible relationship between serum uric acid (SUA) and testosterone. However, the results of previous studies are controversial and there is limited evidence examining the relationship between SUA and testosterone in a general US population of men. The objective of this study is to explore the correlation of SUA and testosterone among adult males from the US.

Methods: Data from the National Health and Nutrition Examination Survey 2011-2016 were used, including a total of 7,796 male participants aged 18 years or older and excluding those lacking serum testosterone and uric acid data. Clinical characteristics of the participants among different SUA groups and testosterone groups are compared. Univariate and multivariate linear regression analyses were applied to evaluate the association between SUA and testosterone.

Results: We found an inverse association between SUA and testosterone after fully adjusted the potential confounding factors in general US adult males. In the multivariate linear regression analysis, we found that increasing age (estimate testosterone percent difference: -0.20% per year, P<0.01), uric acid (estimate testosterone percent difference: -4.40% per md/dL, P<0.01) and BMI (estimate testosterone percent difference: -2.86% per kg/m2, P<0.01) were associated with declining serum testosterone. This association remained significant in sensitivity analysis, while in the stratified analysis, above association was not significant in men with diabetes or aged 65 and over.

Conclusions: SUA levels might be negatively associated with serum testosterone in adult males.