Table 3.

Contingency table for patients with indeterminate lesions (n=113)

FDG-PET	Cancer	Benign
Avida	65	24	PPVb 73% 95%CI: (63, 82)
Not-Avidc	8	16	NPVd 67% 95%CI: (45, 84)
			Prevalence 65% 95%CI: (55, 73)
Sensitivity 89% 95%CI: (80, 95)
Specificity 40% 95%CI: (25, 57)

Patients did not have a preoperative diagnosis or had a non-diagnostic needle biopsy. The diagnosis was based upon pathological result of resected specimen.

^aFDG-PET avidity was defined by an SUV > 2.5 or moderate or intense uptake.

^bPPV = positive predictive value.

^cNot-Avid, cancerous lesions (n=8) include 6 with documented growth, 1 with spiculated edge and 1 larger than 4cm in maximum diameter.

^dNPV = negative predictive value