In recent years, The National Academy of Clinical Biochemists indicated that 95 % of individuals without thyroid disease have TSH concentrations below 2.5 μIU / mL, and
a new normal reference range was defined by the American College of Clinical Endocrinologists to be between 0.3 - 3.0 μIU / mL.
Not exact matches
They may be using an outdated
reference range, using «
normal»
reference ranges from their medical school days, and are unfamiliar with
newer guidelines that in fact have a narrower optimal
range (see the conventional versus optimal lab
ranges below).
Most physicians only look for values outside of the «
normal»
reference range provided by the labs and may not be familiar with the
new guidelines.