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Impact of Ca/P disorders on risks and comorbidities

Piergiorgio Messa1

  • 1Nephrology, Dialysis, and Renal Transplant Unit, Ospedale Maggiore-Policlinico- IRCCS, Milan, Italy.

Contributions to Nephrology
|May 3, 2008
PubMed

Insights

Mineral metabolism derangements in chronic kidney disease (CKD) may not directly cause increased mortality. Current evidence lacks definitive proof that correcting calcium and phosphate levels improves patient outcomes.

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Clinical Biochemistry

Background:

  • Chronic kidney disease (CKD) is associated with significantly higher rates of cardiovascular morbidity and mortality.
  • Mineral metabolism (MM) derangements, particularly involving calcium (Ca) and phosphate (P), are suspected contributors to poor outcomes in CKD patients.
  • These derangements are hypothesized to negatively impact vascular calcification, a process linked to cardiovascular events.

Purpose of the Study:

  • To critically evaluate the evidence linking mineral metabolism changes to increased mortality in CKD patients.
  • To assess whether correcting mineral metabolism parameters improves clinical outcomes in CKD.
  • To determine if a causal relationship exists between MM derangements and CKD mortality.

Main Methods:

  • Review of existing experimental in vitro studies and retrospective association studies.
  • Analysis of the temporal relationship between mineral metabolism changes and mortality rates in CKD progression.
  • Examination of clinical data regarding the effects of MM parameter correction on patient outcomes.

Main Results:

  • Current evidence supporting a causal link between MM changes and CKD mortality is primarily based on in vitro or retrospective studies, lacking definitive cause-effect demonstration.
  • Calcium and phosphate abnormalities often appear in later stages of CKD, contrasting with the early onset of increased mortality.
  • No robust clinical evidence demonstrates that correcting MM parameters leads to improved clinical outcomes in CKD patients.

Conclusions:

  • While experimental and retrospective data suggest a role for Ca and P derangements in CKD mortality, convincing clinical data is lacking.
  • There is insufficient evidence to conclude that correcting mineral metabolism parameters improves the clinical outcome of CKD patients.
  • Further well-designed clinical trials are needed to establish a causal link and therapeutic benefit of MM correction in CKD.

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