Quest says some vitamin D tests gave wrong result

BOSTON (Reuters) - Quest Diagnostics Inc said on Thursday that it had provided possibly erroneous results to thousands of people who had their vitamin D levels tested over the past two years.

Quest, the largest U.S. provider of diagnostic testing, said it sent letters to doctors who might have received “questionable” test results.

Dr. Wael Salameh, Quest’s medical director for endocrinology, said in an interview that the company had identified the cause of the potential errors and fixed them. He said Quest had implemented a retesting program for patients whose results were questionable.

Salameh said the questionable results emerged in roughly 10 percent of the tests. However, he said he expects the number of actual errors to be lower after retesting, based on the company’s internal analysis.

He said one problem was associated with a chemical used in the test, the other was improper follow-up according to standard operating procedure in some laboratories.

Salameh declined to say how many vitamin D tests had been conducted for competitive reasons, but a company spokeswoman said the impact of the retesting would not be material to its earnings.

(Reporting by Toni Clarke, additional reporting by Ratul Ray Chaudhuri in Bangalore, editing by Matthew Lewis)


Related Posts:

NEW ORLEANS (Reuters) - A new blood test to identify heart failure patients in most dire need of treatment when they turn up at an emergency room complaining of shortness of breath proved better than current tests, according to results of a study unveiled on Tuesday. The pivotal trial of the test developed by privately held

Full Post: New test to identify heart failure in ER superior

By Julie Steenhuysen CHICAGO (Reuters) - People on Medicare who get elective surgery to open blocked heart arteries often do not get the recommended stress tests to confirm the surgery is warranted, U.S. researchers said on Tuesday. The surgery, known as PCI or percutaneous coronary intervention, involves threading a balloon-tipped catheter through the arteries and opening up

Full Post: Doctors often skip key test before surgery

NEW YORK (Reuters Health) - Taking vitamin E supplements does not reduce a woman’s risk of rheumatoid arthritis (RA), an analysis of data from the Women’s Health Study indicates. “Despite plausible biologic mechanisms,” the present randomized, controlled trial does not show that long-term use of vitamin E supplements significantly decreases the risk of developing RA, Dr.

Full Post: Vitamin E won’t prevent rheumatoid arthritis: study

By Maggie Fox, Health and Science Editor WASHINGTON (Reuters) - A simple checklist to confirm a patient’s name, what procedure is to be done, check allergies and count needles and sponges to make sure nothing got left inside halved the rate of surgery-related deaths, doctors reported on Wednesday. The checklist, similar to those used by pilots before

Full Post: Simple checklist cuts accidental deaths in surgery

NEW YORK (Reuters Health) - Lower blood levels of 25-hydroxyvitamin D, a protein that provides an acquire measure of vitamin D in the blood, are independently associated with an increased risk of developing high blood pressure, according to findings published in Hypertension. Studies have shown 25(OH)D levels and skin exposure to UVB radiation…are associated with lower

Full Post: Low vitamin D linked with high blood pressure

Site Navigation

Most Read