Table 2. Number of Positive Test Results and Cancers Detected by MRI, Ultrasonography, and PSA testing.

Variable	MRI		Ultrasonography		PSA (≥3 ng/mL)
	Score 3-5	Score 4-5	Score 3-5	Score 4-5
Positive test result	72	43	96	52	40
Biopsy result
Significant cancera	14	11	9	4	7
Insignificant cancerb	7	5	13	7	6
Benign	44	22	63	35	23
Withdrewc	7	5	11	6	4

Abbreviations: MRI, magnetic resonance imaging; PSA, prostate-specific antigen.

SI conversion factor: to convert PSA to micrograms per liter, multiply by 1.

^aSignificant cancer is defined as a Gleason score of 3+4 or higher (International Society of Urological Pathology score ≥2) (primary histologic definition of clinical significance).

^bInsignificant cancer is defined as a Gleason score of 3+3 (International Society of Urological Pathology score of 1).

^cThe number of men who withdrew after being advised to have a biopsy.