Table 5 Distribution of prostate volume, Q max and PVR among different grades of IPP and their correlation with IPP
Variable | IPP, number (%) | Correlation with IPP | ||||
|---|---|---|---|---|---|---|
Grade I | Grade II | Grade III | Total | rs* | P value | |
Prostate volume | ||||||
 < 40 g 40– 100 g  > 100 g | 26(15.6%) 36(21.6%) 0 | 4(2.4%) 13(7.8%) 4(3%) | 20(12%) 48(28.7%) 16(9%) | 50(29.9%) 97(58.1%) 20(12%) | 0.328 | 0.000 |
Q max | ||||||
 < 10 ml/s 10–15 ml/s  > 15 ml/s | 20(12%) 14(8.4%) 28(16.7%) | 9(5.4%) 0 12(7.2%) | 48(28.7%) 26(15.6%) 10(6.0%) | 77(46.1%) 40(24%) 50(29.9%) | − 0.291 | 0.000 |
PVR | ||||||
 < 50 ml 50–199 ml  ≥ 200 ml | 40(24%) 14(8.4%) 4(2.4%) | 13(7.8%) 6(3.6%) 2(1.2%) | 26(15.6%) 40(24%) 18(10.8%) | 83(49.7%) 60(35.9%) 24(14.4%) | 0.422 | 0.000 |