Table 2. AUC by ROC and correlation coefficient between variables and invasive size.

Variables	AUC ly (n = 336)	AUC v (n = 336)	AUC pl (n = 336)	AUC ly, v, or pl (n = 336)	AUC LN (n = 268)	Correlation with invasive size
SUVmax	0.67	0.65	0.69	0.68	0.80	0.27 (p <0.001)
CD	0.76	0.77	0.75	0.81	0.79	0.73 (p <0.001)
MD	0.83	0.81	0.79	0.85	0.84	0.76 (p <0.001)
C/T	0.77	0.79	0.75	0.80	0.79	0.54 (p <0.001)
Invasive size	0.83	0.80	0.73	0.85	0.80	N.A

AUC: area under an ROC curve; C/T: CD/T; CD: maximal consolidation diameter evaluated with lung window setting; T: total tumor diameter evaluated with lung window setting; LN: lymph node metastasis; ly: lymph vessel invasion; MD: maximal diameter evaluated with mediastinal window setting; pl: pleural invasion; ROC: receiver operating characteristic; SUVmax: maximum standardized uptake value; v: vascular invasion