The value of metabolic imaging to predict tumour response after chemoradiation in locally advanced rectal cancer

Radiation Oncology

Table 4 ROC analysis of 18F-FDG-PET findings for responders according to Mandard criteria (TRG1-2) and specifically to complete pathological response (ypCR).

Variable	End-point	Cutoff	AUC	p	Sens.%	Esp.%	PPV%	NPV%	Acc.%
SUV1	TRG1-2	≤ 10,07	0,618	0,160	45	70	50	65,6	60
	ypCR	≤ 10,14	0,615	0,243	45,5	74,4	33,3	82,9	68
SUV2	TRG1-2	≤4,24	0,773	0,001	70	76,7	66,7	79,3	74
	ypCR	≤4,07	0,748	0,013	63	74,4	41,2	87,9	72
DSUV	TRG1-2	≥ 8,90	0,545	0,593	45	70	50	65,6	60
	ypCR	≥ 9,735	0,508	0,935	36,4	71,8	26,7	80	64
RI	TRG1-2	≥ 62,75	0,623	0,14,3	55	70	55	70	64
	ypCR	≥ 69,67	0,585	0,393	45,5	74,4	33.3	82.8	68

ISSN: 1748-717X