Table I.

Characteristics of all patients who underwent MRI before needle biopsy of the prostate.

Characteristic	Overall (N=241) median ± SD (95% CI)
Age, years	76±4.3 (70–85)
PSA, ng/ml	7.2±3.6 (4.0–15.5)
MRI ROI size, mm	10.0±7.1 (0.0–24.3)
Prostate volume, cc	35.1±18.3 (18.5–80.5)
PSA density, ng/ml/cc	0.20±0.14 (0.08–0.51)

ROI, region of Interest; MRI, magnetic resonance imagine; CI, confidence interval; SD, standard deviation; PSA, prostate specific antigen.