Table 2.

Significantly good imaging parameters in ROC analysis

	Area under ROC curve	95% CI	P
Pretreatment 18F-FDG PET
Short runs emphasis (SRE)	0.75	0.32-0.68	0.006
Long runs emphasis (LRE)	0.75	0.60-0.91	0.005
Gray-level nonuniformity (GLNU)*	0.76	0.56-0.88	0.005
Large zones emphasis (LZE)	0.76	0.60-0.91	0.004
2nd-week 18F-FDG PET
∆SUVmax	0.75	0.56-0.89	0.006
∆MTV	0.77	0.66-0.93	0.004
∆TLG	0.81	0.62-0.92	0.001
∆Run length nonuniformity (RLNU)	0.75	0.61-0.91	0.006
∆Gray-level nonuniformity (GLNU)†	0.77	0.61-0.91	0.003

ROC receiver operating characteristic, SUV_max maximum standardized uptake value, MTV metabolic tumor volume, TLG total lesion glycolysis.

^*Derived from grey level run length encoding method.

^†Derived from grey-level size zone matrix.