Single-port robot-assisted perineal radical prostatectomy with the da Vinci XI system: initial experience and learning curve using the cumulative sum method

Table 3 Pathological data of patients (N=50)

Variables	Results
PSM, n (%)	5 (10.0)
PSM risk^a, n (%)
Low risk	9 (18.0)
Favorable intermediate risk	8 (16.0)
Unfavorable intermediate risk	18 (36.0)
High risk	15 (30.0)
Biopsy grade group, n (%)
Grade group 1	11 (22.0)
Grade group 2	20 (40.0)
Grade group 3	13 (26.0)
Grade group 4	3 (6.0)
Grade group 5	3 (6.0)
Upgrade	19 (38.0)
Pathological stage, n (%)
T2a	17 (34.0)
T2b	3 (6.0)
T2c	23 (46.0)
T3a	2 (4.0)
T3b	5 (10.0)

^aLow risk: grade group 1 and PSA<10; favorable intermediate risk: grade group 2 and PSA<10; unfavorable intermediate risk: grade group 3 or PSA≥10; and high risk: PSA > 20 ng/ml or T stage >2 or grade group≥4

ISSN: 1477-7819