Table 3.
Association of preoperative and postoperative MRI-measured membranous urethral length with urinary incontinence…
| (A) 6 months after RARP | ||||||
|---|---|---|---|---|---|---|
|
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| Univariate | Age adjusted | |||||
|
|
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| OR | 95% CI | p | OR | 95% CI | p | |
| Preoperative membranous urethral length, mm ≤16 vs. >16 | 3.19 | 1.55–6.58 | 0.002 | 3.20 | 1.54–6.68 | 0.002 |
| Preoperative membranous urethral length, mm | ||||||
| Membranous urethral length >16 | 1.00 | ref | 1.00 | ref | ||
| 13.5<Membranous urethral length≤16 | 2.60 | 1.13–5.95 | 0.024 | 2.71 | 1.16–6.32 | 0.021 |
| Membranous urethral length ≤13.5 | 4.08 | 1.74–9.56 | 0.001 | 3.88 | 1.63–9.24 | 0.002 |
| Postoperative membranous urethral length, mm≤15 vs. >15 | 3.89 | 1.83–8.27 | <0.001 | 3.75 | 1.75–8.07 | 0.001 |
| Postoperative membranous urethral length, mm | ||||||
| Membranous urethral length >15 | 1.00 | ref | 1.00 | ref | ||
| 14< Membranous urethral length ≤15 | 1.91 | 0.63–5.75 | 0.250 | 1.81 | 0.59–5.54 | 0.299 |
| 13< Membranous urethral length ≤14 | 3.94 | 1.40–11.06 | 0.009 | 3.37 | 1.16–9.80 | 0.025 |
| Membranous urethral length ≤13 | 5.60 | 2.36–13.27 | <0.001 | 5.84 | 2.41–14.12 | <0.001 |
| Percent change of membranous urethral length, % >6 vs. ≤6 | 1.65 | 0.84–3.25 | 0.150 | 1.63 | 0.82–3.26 | 0.167 |
| Percent change of membranous urethral length, % | ||||||
| Percent change ≤6 | 1.00 | ref | 1.00 | ref | ||
| 6< Percent change ≤12 | 0.89 | 0.32–2.48 | 0.822 | 0.81 | 0.28–2.29 | 0.685 |
| 12<Percent change ≤18 | 1.50 | 0.60–3.78 | 0.390 | 1.68 | 0.65–4.36 | 0.283 |
| Percent change >18 | 3.06 | 1.26–7.43 | 0.014 | 2.94 | 1.17–7.23 | 0.021 |
|
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| (B) 12 months after RARP | ||||||
|
| ||||||
| Univariate | Multivariate# | |||||
|
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||||||
| OR | 95% CI | p | OR | 95% CI | p | |
|
| ||||||
| Preoperative membranous urethral length, mm ≤16 vs. >16 | 2.66 | 0.98–7.18 | 0.054 | 2.72 | 0.97–7.64 | 0.057 |
| Preoperative membranous urethral length, mm | ||||||
| Membranous urethral length >16 | 1.00 | ref | 1.00 | ref | ||
| 13.5< Membranous urethral length ≤16 | 1.16 | 0.31–4.30 | 0.828 | 1.10 | 0.28–4.28 | 0.895 |
| Membranous urethral length ≤13.5 | 5.03 | 1.71–14.75 | 0.003 | 5.95 | 1.85–19.21 | 0.003 |
| Postoperative membranous urethral length, mm ≤15 vs. >15 | 3.24 | 1.13–9.25 | 0.028 | 3.10 | 1.05–9.18 | 0.041 |
| Postoperative membranous urethral length, mm | ||||||
| Membranous urethral length >15 | 1.00 | ref | 1.00 | ref | ||
| 14< Membranous urethral length ≤15 | 2.26 | 0.50–10.21 | 0.288 | 1.96 | 0.40–9.58 | 0.408 |
| 13< Membranous urethral length ≤14 | 2.77 | 0.69–11.12 | 0.152 | 2.63 | 0.63–10.99 | 0.185 |
| Membranous urethral length ≤13 | 4.15 | 1.30–13.25 | 0.016 | 4.15 | 1.24–13.84 | 0.021 |
| Percent change of membranous urethral length, % >6 vs. ≤6 | 1.04 | 0.42–2.57 | 0.940 | 0.84 | 0.32–2.19 | 0.716 |
| Percent change of membranous urethral length, % | ||||||
| Percent change ≤6 | 1.00 | ref | 1.00 | ref | ||
| 6< Percent change ≤12 | 0.80 | 0.21–3.11 | 0.747 | 0.56 | 0.14–2.34 | 0.428 |
| 12< Percent change ≤18 | 0.80 | 0.21–3.11 | 0.747 | 0.70 | 0.17–2.92 | 0.623 |
| Percent change >18 | 1.60 | 0.50–5.12 | 0.429 | 1.35 | 0.40–4.60 | 0.629 |
#
Adjusted for age and diabetes mellitus.
CI: confidence interval; MRI: magnetic resonance imaging; OR: odds ratio; RARP: robotic-assisted radical prostatectomy.