GREAT Score Calcultor (Graves’ Recurrent Events After Therapy)

Age (year): ≥ 40 ＜ 40

Serum Free T4: ＜ 40 pmol/L (3.1 ng/dL) ≥ 40 pmol/L (3.1 ng/dL)

TBII: ＜ 6 U/L 6-19.9 U/L ≥ 20 U/L

Goiter Size: Grade 0-I Grade II-III
Grade 0 : Thyroid not or distinctly palpable.
Grade I : Thyroid easily palpable and visible with head in normal or raised position.
Grade II : Thyroid easily visible with head in normal position.
Grade III : Goiter visible at a distance.

GREAT score (Graves’ Recurrent Events After Therapy)
GREAT score 0-1 points: Class I – Recurrences 16%
GREAT score 2-3 points: Class II – Recurrences 44%
GREAT score 4-6 points: Class III – Recurrences 68%

Reference :
Vos XG, Endert E, Zwinderman AH, Tijssen JG, Wiersinga WM. “Predicting the Risk of Recurrence Before the Start of Antithyroid Drug Therapy in Patients with Graves’ Hyperthyroidism.” J Clin Endocrinol Metab. 2016.