Table 4 Summary of ARIC and Roche cut-points for thyroid dysfunction.
From: Prevalence and Risk Factors of Thyroid Dysfunction in Older Adults in the Community
Overt Hypothyroidism | Subclinical Hypothyroidism | Overt Hyperthyroidism | Subclinical Hyperthyroidism | |
|---|---|---|---|---|
Roche cutoff | TSH > 4.2 mIU/L & FT4 < 0.93 ng/dL | TSH > 4.2 mIU/L & 0.93 ng/dL ≤ FT4 ≤ 1.7 ng/dL | TSH < 0.27 mIU/L & FT4 > 1.7 ng/dL | TSH < 0.27 mIU/L & 0.93 ng/dL ≤ FT4 ≤ 1.7 ng/dL |
ARIC cutoff, Overall | TSH > 5.1 mIU/L & FT4 < 0.85 ng/dL | TSH > 5.1 mIU/L & 0.85 ng/dL ≤ FT4 ≤ 1.4 ng/dL | TSH < 0.56 mIU/L & FT4 > 1.4 ng/dL | TSH < 0.56 mIU/L & 0.85 ng/dL ≤ FT4 ≤ 1.4 ng/dL |
