Tags: vitamin | d | tests | wrong

Vitamin D Tests Often Inaccurate

Thursday, 28 June 2012 02:19 PM

Standard blood tests used to measure vitamin D deficiency are among the most common in medicine, but a new study by Loyola University Chicago Stritch School of Medicine has found they often produce inaccurate results.
Loyola researchers examined how well two tests – known as the Abbott Architect and Siemans Centaur2 test -- performed on 163 randomly selected blood samples from more than 120 patients. In 40 percent of the Abbott tests and 48 percent of the Siemans kits, results were at least 25 percent too high or 25 percent too low.
“There has been an exponential increase in the number of vitamin D tests ordered for patients," noted lead researcher Earle W. Holmes, who presented the findings at The Endocrine Society's 94th Annual Meeting in Houston this week. "But our study of two newly approved tests showed they had pretty poor performance."
Holmes said false test results can lead to misdiagnoses of patients and confound efforts of physicians and nutritionists to identify the optimal levels of vitamin D for good health.
Vitamin D is key to the absorption of calcium, which is needed for strong bones. It helps increase bone density and decrease fractures. Recent studies have found vitamin D also may decrease the risk of osteoporosis, high blood pressure, cancer, heart disease and diabetes. People get vitamin D from their diet, from exposure to the sun and from supplements.
Populations that may be at high risk for vitamin D deficiency include the elderly, people who are obese, babies who are exclusively breast fed and people who don't get enough sun.

© HealthDay

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Tests for vitamin deficiencies were wrong in 40-48 percent of cases, a new study found.
Thursday, 28 June 2012 02:19 PM
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