Table 2.
Surgical planning of nerve-sparing surgery by different observers
| Bilateral + contralateral NSS |
Change when leaving out contralateral biopsy results |
Difference | Cohen’s kappa | |||
|---|---|---|---|---|---|---|
| With result from contralateral SBx | Without result from contralateral SBx | Yes to no | No to yes | |||
| Urologist 1, n (%) | 76 (95) | 77 (96) | 0 | 1 (1.3) | 1 (1.3) | 0.85 |
| Urologist 2, n (%) | 74 (93) | 79 (99) | 0 | 5 (6.3) | 5 (6.3) | 0.27 |
| Urologist 3, n (%) | 76 (95) | 75 (94) | 2 (2.5) | 1 (1.3) | 3 (3.8) | 0.65 |
| Urologist 4, n (%) | 65 (81) | 63 (79) | 13 (16) | 11 (14) | 24 (30) | 0.06 |
| Urologist 5, n (%) | 73 (91) | 76 (95) | 0 | 3 (3.8) | 3 (3.8) | 0.71 |
| Overall n (%, 95% CI) | 364 (91%, 88-94) | 370 (93%, 90-95) | 15 (3.8%, 2.1-6.1) | 21 (5.3%, 3.3-7.9) | 36 (9.0%, 6.4-12) | |
| Fleiss’ kappa | 0.44 | 0.15 | ||||
CI = confidence interval; NSS = nerve-sparing surgery; RARP = robot-assisted radical prostatectomy; SBx = systematic biopsy.
The assessments of different urologists in the surgical planning of patients undergoing RARP were based on a subset of clinical, radiological, and pathological clinical file data. The percentages point out in which patients contralateral or bilateral NSS would be performed with and without the diagnostic information obtained from contralateral SBx. Intraobserver agreement is expressed as Cohen’s kappa, and interobserver agreement is expressed as Fleiss’ kappa.