Thyroid Screen Interpretation 

Updated: Nov 02, 2015
  • Author: Alina G Sofronescu, PhD, NRCC-CC, FACB; Chief Editor: Buck Christensen  more...
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Thyroid Screen Interpretation

Regular thyroid screening can help in the detection and management of various thyroid disorders.

Hypothyroidism and hyperthyroidism are common conditions. Approximately 5% of US adults report having thyroid disease or taking thyroid medication. [1, 2]  

Table 1. Thyroid Screen Interpretation (Open Table in a new window)

Condition

Thyroid-Stimulating Hormone (TSH)

Free T4

T3

Hypothyroidism (mature)

High

Low

Low

Subclinical hypothyroidism

High

Normal

Normal

Hyperthyroidism

Low

High

High

Subclinical hyperthyroidism

Low

Normal

Normal

T3 Toxicosis Low Normal High