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Calcium linked to increased risk of heart disease and death in patients with kidney disease
Date:7/19/2013

TORONTO, ON, July 19, 2013 Kidney patients who take calcium supplements to lower their phosphorous levels may be at a 22 per cent higher risk of death than those who take other non-calcium based treatments, according to a new study by Women's College Hospital's Dr. Sophie Jamal.

The study, published today in the Lancet, calls into question the long-time practice of prescribing calcium to lower phosphate levels in patients with chronic kidney disease. The researchers suggest some of the calcium is absorbed into the blood stream and may expedite hardening of the arteries, leading to a higher risk of heart disease and even death. Cardiovascular disease is a leading cause of death for people with chronic kidney disease.

"Doctors commonly prescribe calcium supplements to prevent elevated phosphate levels, which can damage the body, but a growing number of studies have shown calcium supplements may actually increase the risk of heart disease," explains Dr. Sophie Jamal, a physician at Women's College Hospital and an associate professor of medicine at the University of Toronto. "Our study validates these claims and, for the first time, shows the long-term consequences of taking calcium supplements can be dangerous for patients with kidney disease."

As part of their analysis, researchers reviewed 11 randomized, controlled studies that included more than 4,600 patients. The researchers assessed the risk of heart disease, including heart attack, stroke, and hardening of the arteries, along with death among individuals prescribed the medication containing calcium and those prescribed the medication without calcium. They found:

  • A 22% reduction in death among patients who took non-calcium based treatments sevelamer and lanthanum.
  • Less artery calcification (hardening) in patients who did not take calcium supplements.

"Some researchers and physicians have been saying for years that kidney disease pa
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Contact: Magda Stec
magda.stec@wchospital.ca
416-323-6400 x3210
Women's College Hospital
Source:Eurekalert

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