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Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
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Assessment of Kidney Function in Mouse Models of Glomerular Disease
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Cystatin C versus creatinine in determining risk based on kidney function.

Michael G Shlipak1, Kunihiro Matsushita, Johan Ärnlöv

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Adding cystatin C measurements to serum creatinine improves estimated glomerular filtration rate (eGFR) accuracy for chronic kidney disease detection and risk stratification. This enhances prediction of death and end-stage renal disease across diverse populations.

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Area of Science:

  • Nephrology
  • Clinical Chemistry
  • Epidemiology

Background:

  • Estimated glomerular filtration rate (eGFR) is crucial for chronic kidney disease (CKD) management.
  • Serum creatinine is the standard marker for eGFR, but its accuracy varies.
  • Cystatin C offers a potentially more accurate alternative or adjunct marker.

Purpose of the Study:

  • To evaluate the impact of adding cystatin C to serum creatinine for eGFR calculation.
  • To determine the effect on CKD detection, staging, and risk classification.
  • To assess the association of cystatin C-based eGFR with mortality and end-stage renal disease (ESRD) outcomes.

Main Methods:

  • Meta-analysis of 16 general population and CKD cohort studies (93,710 participants).
  • Compared eGFR calculated by creatinine alone, cystatin C alone, or both.
  • Analyzed associations with all-cause mortality, cardiovascular death, and ESRD.

Main Results:

  • Cystatin C-based eGFR identified a higher prevalence of reduced kidney function (<60 mL/min/1.73 m²).
  • Reclassification to a higher eGFR with cystatin C correlated with reduced risk of adverse outcomes.
  • Net reclassification improvement was observed for death and ESRD using cystatin C.

Conclusions:

  • Incorporating cystatin C measurement with creatinine strengthens eGFR associations with mortality and ESRD.
  • This approach improves risk prediction and CKD classification in diverse populations.
  • Cystatin C offers significant value in assessing kidney function and patient prognosis.