表 4.

各计量资料ROC曲线结果

ROC curve factors

Factors	Cut-off value	AUC	Sensitivity (%)	Specificity (%)	Youden index
AUC: area under the curve; ROC: receiver operating characteristic.
Year	55.50	0.702	64.7	67.7	0.324
Nodule volume	681.25	0.826	74.5	79.1	0.536
Solid partial volume	49.10	0.863	80.4	79.7	0.601
proportion of solid component volume (%)	9.05	0.800	73.4	73.7	0.471
Average CT value	-515.95	0.734	58.3	79.7	0.380
Nodule diameter	12.55	0.827	74.0	77.8	0.518
Solid component diameter	5.65	0.826	62.6	89.9	0.525
Mediastinal window nodule diameter	2.05	0.779	64.3	84.5	0.488
CTR (%)	25.77	0.759	78.3	61.1	0.394
1-TDR (%)	6.71	0.761	67.7	79.1	0.468