Hi Jake – Can you clarify something? I understand about the labs using different levels to indicate who is normal or not. But,
1. does that also mean that these labs use different procedures to get at the TSH? Meaning, if I get a TSH of 5.9 at Lab 1. Will Lab 2 also get a TSH of 5.9? Or, do they use something else and can get a 6.9?
2. And then, if the TSH levels are the same, the first lab can say I am normal, and the second will say I am abnormal because they also INTERPRET differently?
(Numbers all arbitrary.)
Is is just #2 or both #1 and #2 that each lab does differently? Hope this make sense and thanks for your help.
Janet