Laboratory testing supports most clinical decision-making; however, the concept of a fixed “normal” value is theoretical. Studies have suggested that approximately 7 out of 10 clinical decisions rely ...

Your doctor says everything looks fine, but you still feel terrible. The problem might not be your health but how labs define “normal.” Understanding the difference between normal and optimal could ...

You receive a phone call: the results from routine blood tests show a “low white cell count”. Your doctor explains that more investigations are necessary, perhaps a referral to the haematologists.

Please provide your email address to receive an email when new articles are posted on . Researchers created thyroid function reference ranges adjusted for age, sex and racial-ethnic background. Using ...

Brody H. Foy does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...