A nurse is reviewing thyroid test results of her clients. Which of the following is the most likely thyroid test result for a healthy elderly patient?
A) T4: low; T3: low; thyroid function: low
B) T4: high; T3: normal; thyroid function: high
C) T4: high; T3: normal; thyroid function: low
D) T4: normal; T3: low; thyroid function: normal
D
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With normal aging, secretion of thyroid-stimulating hormones (TSH) and the serum concentration of thyroxine (T4) do not change, although there is a significant reduction in triiodothyronine (T3), which is believed to be a result of the reduced conversion of T4 to T3 . Overall, thyroid function remains adequate.
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Which factor has the largest impact on health disparities among all populations?
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