Table 2.

Number and percent of prostate-cancer cases by category of selected clinical characteristics

Characteristic	Category	Number	Percent
Pre-diagnostic prostate specific antigen (PSA) level (ng/ml)
	<4	6	7
	4 to <20	36	44
	20 to <50	22	27
	50 to <100	7	9
	100+	10	13
	Total	81	100
Gleason grade
	5 (low)	1	2
	6	32	42
	7	24	32
	8	12	16
	9	5	6
	10 (high)	2	2
	Total	76	100
Clinical stagea
	T1	29	36
	T2	26	32
	T3	11	14
	T4	15	18
	Total	81	100
Aggressive diseaseb
	Yes	60	74
	No	21	26
	Total	81	100

^aT1 tumor present but not palpable or detectable with imaging, T2 tumor can be palpated on examination but has not spread beyond the prostate capsule, T3 tumor has spread through the prostate capsule, T4 tumor has metastasized

^bAggressive disease defined as Gleason grade 7–10, Stage T3–T4, or PSA >20ng/ml