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Elevated Serum Uric Acid Level Predicts Rapid Decline in Kidney Function.

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Elevated serum uric acid (SUA) and its increase over time are independent risk factors for rapid decline in kidney function (eGFR). This 5-year study highlights SUA

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Area of Science:

  • Nephrology and Endocrinology
  • Epidemiology and Public Health
  • Metabolic Syndrome Research

Background:

  • Elevated serum uric acid (SUA) is a known risk factor for chronic kidney disease (CKD).
  • The independent association between changes in SUA and changes in estimated glomerular filtration rate (eGFR) over time requires further investigation.
  • Understanding this relationship is crucial for predicting and preventing kidney function decline in the general population.

Purpose of the Study:

  • To examine the longitudinal associations between changes in serum uric acid (SUA) and changes in estimated glomerular filtration rate (eGFR) over a 5-year period.
  • To determine if elevated baseline SUA and increasing SUA over time are independent risk factors for rapid eGFR decline.
  • To investigate these associations within a general Japanese population.

Main Methods:

  • A retrospective 5-year cohort study involving 12,578 subjects from a general Japanese population (aged 30-85 years) with available data between 2004 and 2009.
  • Exclusion of subjects with baseline eGFR <60 mL/min/1.73 m2.
  • Analysis using linear and logistic regression models, stratified by baseline eGFR, to assess relationships between SUA and eGFR changes, adjusted for multiple covariates.

Main Results:

  • A 1 mg/dL increase in baseline serum uric acid (SUA) was associated with significantly greater odds of developing rapid eGFR decline (OR 1.27).
  • A 1 mg/dL increase in SUA over the 5-year study period was strongly associated with substantially greater odds of rapid eGFR decline (OR 3.77).
  • These associations remained significant after multivariable adjustments, including baseline eGFR.

Conclusions:

  • Elevated baseline serum uric acid (SUA) is an independent risk factor for rapid decline in estimated glomerular filtration rate (eGFR) over 5 years.
  • Increasing SUA levels over time also independently predict a faster decline in kidney function.
  • These findings underscore the importance of monitoring and managing SUA levels for kidney health preservation.