2.

两种系统不同各个分级甲状腺结节性质构成比、诊断敏感性、特异性及准确性

Sensitivity, specificity and accuracy of the two TI-RADS classification systems

TI-RADS Category	ACR					Kwak
	TR2	TR3	TR4	TR5		3	4a	4b	4c	5
Se: Sensitivity; Sp: Specificity; PV+: Positive predictive value; PV-: Negative predictive value; LR+: Positive likelihood ratio; LR-: Negative likelihood ratio; DOR: Diagnostic odds ratio; TR: TI-RADS Risk.
Malignant nodules	0	7	23	102		1	6	13	75	37
Ⅲ-Ⅳ	1	6	9	9		2	6	6	8	3
Benign nodules	23	92	57	21		28	113	21	21	10
Total	24	105	89	132		31	125	40	104	50
Malignant rate (%)	0	7.1	28.8	83.0		3.5	5.0	38.2	78.1	78.7
Se	1.000	1.000	0.947	0.773		1.000	0.992	0.947	0.848	0.280
Sp	0	0.119	0.595	0.891		0	0.145	0.731	0.840	0.948
PV+	0.406	0.437	0.615	0.830		0.406	0.443	0.706	0.783	0.787
PV-	-	1.000	0.942	0.851		-	0.966	0.953	0.890	0.658
LR+	1.000	1.135	2.343	7.101		1.000	1.161	3.515	5.283	5.410
LR-	-	0	0.089	0.255		-	0.052	0.073	0.181	0.759
DOR	-	-	26.328	27.848		-	22.230	48.420	29.265	7.127
Youden index	0	0.119	0.543	0.664		0	0.138	0.678	0.688	0.228
Accuracy	0.406	0.477	0.738	0.843		0.406	0.489	0.818	0.843	0.677