Undiagnosed thyroid disease statistics get quoted everywhere. NHANES III tested 17,353 people and found 4.6% with hypothyroidism, mostly subclinical.

Reading a thyroid panel starts with TSH, not the value flagged in red. Free T4 comes next, and the range that decides your result is your own lab's.

At-home thyroid test accuracy splits in two: mail-in kits analyzed by a lab track vein-draw TSH closely, while rapid strip tests read at home do not.

TSH test cost depends on one code: CPT 84443. Uninsured patients can request a
written estimate first, and dispute bills $400 over it.

TPO antibodies and TSH answer different questions — one measures function, the other cause. NHANES III found 11.3% of US adults carry them. See the grid.

High TSH causes are not all thyroid. Assay interference affects an estimated 0.05% to 6% of samples, depending on the platform used.

TSH retest timing isn't one number. A borderline high result is usually repeated in 2–3 months, and many return to normal on their own.

Thyroid screening isn't one-size-fits-all. In a trial of 737 adults 65+, treating mildly high TSH showed no apparent benefit. Here's who should still test.

TSH suppression in thyroid cancer carries trade-offs: in 771 low- and intermediate-risk patients, it raised osteoporosis risk without reducing recurrence.

Thyroid test results for older parents need age context: TSH can run higher after 80 even when the thyroid is healthy. Here's how to read them.