5.

形态学参数与能谱参数鉴别NSCLC纵隔淋巴结转移的ROC曲线分析结果

Results of ROC analysis of morphologic indexes and dual-energy CT parameters in differential diagnosis of mediastinal metastatic and non-metastatic lymph nodes in non-small cell lung cancer (NSCLC)

Items		AUC	Sensitivity/%	Specivicity/%	Positive predictive value/%	Negative predictive value/%	Accuracy/%
Data in parentheses are 95%CI. LogitP, combination of short-axis diameter and normalized iodine concentration in venous phase; L, long-axis diameter; S, short-axis diameter; IC, iodine concentration; NIC, normalized iodine concentration; λHU, slope of spectral hounsfield unit curve; Zeff, effective atomic number.
Parameter threshold
S	8.50	0.752(0.672-0.832)	67.4(52.5-80.1)	73.7(64.6-81.5)	52.4(43.3-61.3)	84.0(77.6-88.8)	71.8(64.2 -78.5)
L	10.94	0.654(0.564-0.745)	79.6(65.7-89.8)	50.0(40.5-59.5)	40.6(35.2-46.3)	85.1(76.1-91.1)	58.9(50.9 -66.5)
S/L	0.76	0.734(0.644-0.825)	57.1(42.2-71.2)	84.2(76.2-90.4)	60.9(48.8-71.7)	82.1(76.6-86.4)	76.1(68.8-82.4)
Arterial phase
IC	22.23	0.660(0.561-0.759)	61.2(46.2-74.8)	70.2(60.9-78.4)	46.9(38.1-55.8)	80.8(74.4-85.9)	67.5(59.7-74.6)
NIC	0.31	0.850(0.793-0.908)	91.8(80.4-97.7)	69.3(60.0-77.6)	56.3(49.1-63.2)	95.2(88.5-98.1)	76.1(68.8-82.4)
λHU	2.11	0.754(0.674-0.834)	57.1(42.2-71.2)	84.2(76.2-90.4)	60.9(48.8-71.7)	82.1(76.6-86.4)	76.1(68.8-82.4)
Zeff	8.34	0.657(0.569-0.744)	73.5(58.9-85.1)	56.1(46.5-65.4)	41.9(35.5-48.5)	83.1(75.0-89.0)	61.4(53.4-68.9)
Venous phase
IC	25.56	0.643(0.544-0.742)	44.9(30.7-59.8)	83.3(75.2-89.7)	53.7(40.9-66.0)	77.9(73.0-82.1)	71.8(64.2-78.5)
NIC	0.53	0.861(0.806-0.915)	95.9(86.0-99.5)	70.2(60.9-78.4)	58.0(50.9-64.8)	97.6(91.1- 99.4)	77.9(70.8-84.0)
λHU	2.72	0.807(0.736-0.878)	81.6(68.0-91.2)	66.7(57.2-75.2)	51.3(44.0-58.5)	89.4(82.2-93.9)	71.2(63.6-78.0)
Zeff	8.74	0.701(0.624-0.779)	89.8(77.8-96.6)	52.6(43.1-62.1)	44.9(39.6-50.3)	92.3(83.7-96.6)	63.8(55.9-71.2)
LogitP	0.56	0.895(0.846-0.943)	79.6(65.7-89.8)	87.7(80.3-93.1)	73.6(62.6-82.3)	90.9(85.1- 94.6)	85.3(78.9-90.3)