Table 3.

Daily levothyroxine dose thresholds for prediction of transient congenital hypothyroidism between ages 6 months and 3 years

Age	Optimal cut point dose, μg/kg/d	Dose for 100% sensitivity for T-CH, μg//kg/d	Dose for 100% specificity for T-CH, μg//kg/d
6 mo	< 3.9	< 6.5	< 0.4
1 y	< 3.0	< 6.0	< 0.1
2 y	< 3.0	< 5.2	< 1.1
3 y	< 2.5	< 4.9	< 1.5

Abbreviation: T-CH, transient congenital hypothyroidism.