Table 5 Comparison between the amount of urinary leakage by the 1-h pad test and the PPM cross-sectional area or left–right diameter of RUM before and after RARP: multiple regression analysis.

From: Role of puboperinealis and rectourethralis muscles as a urethral support system to maintain urinary continence after robot-assisted radical prostatectomy

After RARP

1 month

3 months

6 months

9 months

12 months

Β (95% CI)

p-value

Β (95% CI)

p-value

Β (95% CI)

p-value

Β (95% CI)

p-value

Β (95% CI)

p-value

BMI

0.15 (0.01–0.04)

 < 0.01

0.01 (− 0.00–0.03)

0.08

      

NVB preservation

− 0.11 (− 0.25 to – 0.01)

 < 0.05

  

− 0.79 (− 0.19 to – 0.23)

0.12

− 0.08 (− 0.20–0.02)

0.11

  

Prostate volume

    

0.06 (− 0.00–0.01)

0.28

    

PPM (cross-sectional area)

 Pre-RARP

          

 Post-RARP

− 0.05 (− 0.14–0.04)

0.26

− 0.13 (− 0.21 to − 0.42)

 < 0.01

− 0.11 (− 0.19 to − 0.04)

0.43

− 0.13 (− 0.20 to − 0.05)

 < 0.01

− 0.10 (− 0.47 to − 0.03)

 < 0.01

 Changes before and after RARP

0.17 (0.06–0.28)

 < 0.01

0.26 (0.16–0.36)

 < 0.001

0.30 (0.20–0.39)

 < 0.001

0.20 (0.11–0.30)

 < 0.001

0.27 (0.18–0.36)

 < 0.001

RUM (left–right diameter)

 Pre-RARP

0.19 (− 0.01–0.38)

0.06

0.18 (− 0.59–0.42)

0.14

0.24 (0.02–0.45)

 < 0.05

0.13 (− 0.09–0.35)

0.25

0.26 (0.05–0.47)

 < 0.05

 Post-RARP

0.30 (0.09–0.50)

 < 0.01

0.14 (− 0.09–0.37)

0.23

0.11 (− 0.01–0.32)

0.30

0.11 (0.10–0.32)

0.31

0.12 (− 0.73–0.32)

0.22

 Changes before and after RARP

0.05 (− 0.21–0.30)

0.72

        
  1. BMI body mass index, NV neurovascular bundle, PPM puboperinealis muscle, RUM rectourethral muscle, RARP robot-assisted radical prostatectomy.
  2. Change in PPM before and after RARP: preoperative PPM − postoperative PPM.
  3. Change in RUM before and after RARP: preoperative RUM − postoperative RUM.