Table 3. Pretreatment prediction of tumor significance.

Pretreatment Criterion*	No. Tumor Category				% Pos. Predictive Value	% Neg. Predictive Value
	Insignificant	Minimal	Moderate	Advanced
Transrectal ultrasound:
Neg.	16	8	39	10	83	22
Pos.	10	5	31	12
Ca size (mm.VGleason pattern 4 or 5:  Less than 3 on 1 core/none	15	7	28	4	87	28
3 or More on any core/any	25	22	96	43
PSA density/pathological findings on needle biopsy  Less than 0.15/good	5	1	2	0	84	63
0.15 or More/poor	10	6	34	14

^*Positive—suspicious lesion. Negative—no suspicious lesion. Good pathological findings refer to a Gleason score of less than 7, fewer than 3 cores involved with cancer and less than 50% involvement of any core with cancer. Poor pathological findings refer to a Gleason score of 7 or more, 3 or more cores involved with cancer, or 50% or more involvement of any core with cancer.