Table 5 Correlation of Gleason score of 565 prostate biopsy sessions according to the OLD and the NEW rules, combining cases into more meaningful groups, Gleason score ⩽6, 3+4, 4+3 and ⩾8
 Gleason score by the OLD rules Gleason score by the NEW rules ⩽6 3+4 4+3 ⩾8 ⩽6 178 22 0 0 3+4 0 85 59 28 4+3 0 0 45 63 ⩾8 0 0 0 85