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editorial
. 2015 Aug 21;4(3):143–148. doi: 10.1159/000438909

Table 1.

Proposed grading of hypothyroidism and hyperthyroidism

TSH FT4 FT3
Hypothyroidism grade IA increased, >4.0 to <10 mU/l normal normal
Hypothyroidism grade IB increased, >10 mU/l normal normal
Hypothyroidism grade II increased decreased normal
Hypothyroidism grade III increased decreased decreased
Hyperthyroidism grade IA decreased, >0.1 to <4.0 mU/l normal normal
Hyperthyroidism grade IB decreased, <0.1 mU/l normal normal
Hyperthyroidism grade II decreased normal increased
Hyperthyroidism grade III decreased increased increased

Normal, increased, decreased: values within, above, below respective reference intervals.