PET/CT Is Complementary to Fine-Needle Aspiration Cytology in Assessment of Irradiated Neck in Head and Neck Cancers

Table 3

Factors affecting diagnostic accuracy of PET/CT in irradiated neck.

	Sensitivity	Specificity	PPV	NPV
Sex	.699	.374	.699	.374
Age	.652	.354	.507	.491
RT dose	.906	.958	.622	.191
Interval between PET/CT and RT completion (months)	.578	.759	.099	.626
Nature of RT (primary versus adjuvant treatment)	.328	.460	.328	.193
Second course of RT	.470	.850	.470	.850

RT: radiotherapy; PPV/NPV: positive/negative predictive value.