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Table 2 Patients’ background

From: The optimal number of initial prostate biopsy cores in daily practice: a prospective study using the Nara Urological Research and Treatment Group nomogram

  All patients (n = 936) No cancer (n = 487) Cancer (n = 449) p value
Age <0.001
 Mean (median) 71 (71) 69 (70) 73 (73)  
 Range 22–94 22–89 49–94  
PSA (ng/mL) 0.008
 Mean (median) 58.5 (7.1) 7.4 (5.8) 114.0 (10.1)  
 Range 0.3–16,920 0.3–83.6 0.6–16,920  
PV (mL) <0.001
 Mean (median) 38.0 (33.2) 43.6 (38.8) 32.0 (28.1)  
 Range 6–176 6–176 10–155  
PSAD (ng/mL/mL) 0.005
 Mean (median) 1.99 (0.22) 0.21 (0.15) 3.94 (0.41)  
 Range 0.0–480.7 0.0–3.1 0.0–480.7  
VBR (volume biopsy ratio) (mL/core) <0.001
 Mean (median) 4.17 (3.89) 4.50 (4.22) 3.80 (3.64)  
 Range 0.46–17.62 0.46–17.62 0.86–15.47  
Number of biopsy cores <0.001
 6 169 41 (24.3) 128 (75.7)  
 8 331 161 (48.6) 170 (51.4)  
 10 237 130 (54.9) 107 (45.1)  
 12 199 155 (77.9) 44 (22.1)  
Gleason score, no (%)
6 143   143 (32.0)  
 7 211   211 (47.2)  
 8–10 93   93 (20.8)