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Approved lab referenceFrom the archive
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90-99 above desirable; 100-119 borderline high; 120-139 high; ≥140 very high. Risk goals may be lower.

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≥75 increased; ≥125 commonly treated as a risk-enhancing level. Units are not directly interchangeable with mg/dL.

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≥2 suggests higher cardiovascular risk; >10 may reflect acute inflammation and should generally be repeated when well.

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Age, kidney function, obesity, rhythm, and clinical setting affect interpretation.

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The test method and the reason for testing affect which cutoff your clinician uses.

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Adult interval. Pregnancy and pituitary disease require different interpretation.

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Binding abnormalities and severe illness may affect some free-hormone assays.

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Useful in selected hyperthyroid states; not a sensitive stand-alone test for hypothyroidism.

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