5 Questions: Ioannidis on the need to test medical 'truths'

(Medical Xpress) -- How many established standards of medical care are wrong? Disturbingly, no one knows for sure, but one study suggests that it could be almost half, according to a commentary published in the Jan. 4 issue of the Journal of the American Medical Association. In many instances, physicians are prescribing treatments or therapies for which there is little or no evidence to support their use. And when evidence emerges that the harms posed by an established treatment may outweigh its benefits for certain patients, some physicians are reluctant to change the way they’ve practiced medicine during their careers.

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