Table 3.

Relationship Between Fetal Thyroid Hypertrophy and Maternal TRAb Level

Maternal MaxTRAb	Optimal Cutoff, IU/L	Sensitivity, %	Specificity,%	PPV, %	NPV, %	Correctly Classified, %	AUC
All women (n = 417)	2.5	100 (100–100)	64 (60–68)	26 (22–30)	100 (100–100)	68	0.91 (0.87–0.94)
Receiving ATDs during  pregnancy
Yes (n = 145; 35.0%)	2.5	100 (100–100)	39 (31–47)	38 (30–46)	100 (100–100)	40	0.83 (0.76–0.90)
No (n = 272; 65.0%)	2.5	100 (100–100)	73 (68–78)	8 (5–11)	100 (100–100)	74	0.91 (0.87–0.94)

Data in parentheses are 95% confidence intervals.

Abbreviation: MaxTRAb, maximum TRAb.