High alkaline phosphatase levels boosted mortality 25% in chronic kidney cases
THURSDAY, July 31 (HealthDay News) -- High levels of alkaline phosphatase -- a routinely measured marker of bone disease -- may signal an increased risk of death among patients receiving dialysis for chronic kidney disease, say U.S. researchers.
The study analyzed data on almost 74,000 hemodialysis patients during a three-year period. It found that patients with alkaline phosphatase levels above the upper limit of normal (>120 IU/L) had a 25 percent higher death rate. This association was significant across various subgroups of patients.
The study also found that patients whose alkaline phosphatase level increased during the first six months of the study were at higher risk over the subsequent two-and-one-half years.
The findings were expected to be published in the November issue of the Journal of the American Society of Nephrology.
"This large epidemiological study shows, for the first time, a consistent and robust association between a high blood level of alkaline phosphatase and cardiovascular death in thousands of dialysis patients across the United States," researcher Dr. Kamyar Kalantar-Zadeh, of the University of California, Los Angeles, said in an American Society of Nephrology news release.
"If the association between alkaline phosphatase and mortality has a causal link, treatment strategies that reduce alkaline phosphatase levels may improve survival in patients with CKD [chronic kidney disease] and probably in many other patients with chronic diseases and active bone disorders," Kalantar-Zadeh said.
Alkaline phosphatase levels are routinely measured in dialysis patients to monitor for metabolic bone disease, a common complication of CKD. However, current guidelines don't include specific recommendations or targets for alkaline phosphatase levels in patients.
"In dialysis patien
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