Test results expressed in terms of the presence (positive) or absence (negative) of a property or condition
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Excess biotin in the blood from supplements ca
Results from an AHRQ-funded study of online lab-test portals show that patients need help understanding their test results.
New cautions and tips are for people who take warfarin and use portable INR test meters to monitor their therapy.
The FDA issued a safety communication alerting the public and healthcare practitioners that biotin (vitamin B7) found in many supplements may interfere with certain lab tests, causing incorrect results.
The BRCA Exchange is a free public resource that classifies BRCA gene variants according to how they can affect a person's health.
A reference range is a set of values that includes upper and lower limits of a lab test based on a group of otherwise healthy people. By comparing your test results with reference values, you and your healthcare provider can see if any of your test results fall outside the range of expected values and gain clues to help identify possible conditions or diseases.
Test or procedure result inappropriately indicating a normal or negative result when, in fact, an abnormal condition is actually present.