Table 2.

The diagnostic efficiency of different indicators for thyroid cancer before and after PSM

Variable	Before or after PSM	Cutoff	AUC	Sensitivity (%)	Specificity (%)
CTC (FU/3 mL)	B	7.55	0.553	69.5	43.5
	A	7.55	0.537	65.6	45.8
TgAb (IU/mL)	B	4.225	0.568	42.4	72.4
	A	3.580	0.546	40.0	70.8
Ultrasound	B	–	0.807	81.3	79.7
	A	–	0.705	77.1	63.2
CTC + ultrasound	B	–	0.820	81.4	80.0
	A	–	0.718	79.3	61.7
CTC + TgAb + ultrasound	B	–	0.827	81.5	80.0
	A	–	0.724	78.0	63.3

PSM Propensity Score Matching, CTC circulating tumor cell, TgAb thyroglobulin antibody, AUC area under the curve, A after PSM, B before PSM