Table 4.

Findings derived from ROC curve of pure ground-glass nodules.

	AUC	95% CI	Cutoff value	Sensitivity	Specificity
Tumor size (mm)	0.858	0.802–0.914	10.75	82.8	80.6
Mean CT value (HU)	0.674	0.602–0.746	− 629.315	78.1	50.7
Tumor size + mean CT value	0.881	0.828–0.934		78.1	87.5