Table 3.

Surgical planning of ePLND by different observers

	ePLND plan		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 (%)	44 (55)	49 (61)	0	5 (6.3)	5 (6.3)	0.87
Urologist 2, n (%)	48 (60)	47 (59)	2 (2.5)	1 (1.3)	3 (3.8)	0.92
Urologist 3, n (%)	45 (56)	42 (53)	4 (5.0)	1 (1.3)	5 (6.3)	0.87
Urologist 4, n (%)	48 (60)	49 (61)	2 (2.5)	3 (3.8)	5 (6.3)	0.87
Urologist 5, n (%)	42 (52)	41 (51)	2 (2.5)	1 (1.3)	3 (3.8)	0.92
Overall n (%, 95% CI)	227 (57%, 51-62)	228 (57%, 52-62)	10 (2.5%, 1.2-4.5)	11 (2.8%, 1.4-4.9)	21 (5.3%, 3.3-7.9)
Fleiss’ kappa	0.84	0.83

CI = confidence interval; ePLND = extended pelvic lymph node dissection; 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 file data. The percentages point out in which patients ePLND would be performed with and without the diagnostic information obtained from contralateral SBx. The change points out in which direction the surgical plan for ePLND differs if diagnostic information from contralateral SBx is unavailable. Intraobserver agreement is expressed as Cohen’s kappa, and interobserver agreement is expressed as Fleiss’ kappa.