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. 2017 Jul 21;7(7):e015580. doi: 10.1136/bmjopen-2016-015580

Table 1.

Comparison of descriptive characteristics (n (% of treatment group))

Feature RALP (n=2241) OP (n=1818) LP (n=250) p Value
Age (median (25%–75% quartile)) <0.001
64 (60–67) 65 (61–68) 65 (61–68)
Region <0.001
 Capital Region of Denmark 1097 (49) 1272 (70) 120 (48)
 Region of Southern Denmark 121 (5) 123 (7) 12 (5)
 Central Denmark Region 554 (25) 264 (15) 77 (31)
 North Denmark Region 470 (21) 160 (9) 39 (16)
Organisation type* <0.001
 Within department 878 (39) 1009 (55) 101 (41)
 Across departments 470 (21) 160 (9) 39 (16)
 Robotic centre 894 (40) 650 (36) 108 (44)
Tumour size 0.521
 T0-T2 847 (38) 649 (36) 81 (33)
 T3-T4 324 (14) 265 (15) 37 (15)
 Ta & Tis 0 (0) 1 (0) 0 (0)
 Missing data 1071 (48) 904 (50) 130 (52)
Nodal involvement <0.001
 N0 304 (14) 489 (27) 46 (19)
 N1-N3 40 (2) 41 (2) 3 (1)
 Missing data 1898 (85) 1289 (71) 199 (80)
Metastases 0.001
 No 652 (29) 565 (31) 46 (19)
 Yes 0 (0) 1 (0) 0 (0)
 Missing data 1590 (71) 1253 (69) 202 (81)
CCI 0.401
 0 3 (0) 1 (0) 0 (0)
 1 0 (0) 1 (0) 0 (0)
 2 2230 (99) 1810 (100) 245 (99)
 3 4 (0) 2 (0) 2 (1)
 6 5 (0) 5 (0) 1 (0)

*Organisation type refers to whether the robot is used within a single department, used across several departments or used in a robotic centre.

CCI, Charlson Comorbidity Index; LP, laparoscopic prostatectomy; OP, open prostatectomy; RALP, robot-assisted laparoscopic prostatectomy; Ta, tumour without invasion; Tis, carcinoma in situ.