TABLE 2
Classification of subclinical hypothyroidism
Thyroid-stimulating hormone range (mIU/L)
Free T4 range (ng/dL)
Grade 1
4.0–10.0
Normal (0.9–1.7)
Grade 2
> 10.0
Normal (0.9–1.7)
Based on information from references
2
and
10
.