What diagnostic measurement is essential to diagnose and stage hypertension in clinic?
QUESTION
What is the preferred diagnostic imaging study for suspected pneumonia in an outpatient setting?
QUESTION
Which diagnostic test is commonly used to evaluate thyroid function in suspected hypothyroidism?
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ANSWER
Thyroid-stimulating hormone (TSH) level. Elevated levels signal primary hypothyroidism by indicating reduced thyroid hormone feedback to the pituitary.