Table 1 Baseline characteristics and perioperative parameters

Age (years)

62 (57–67)

64 (59–68)

63 (60–68)

0.935

Body mass index (kg/m²)

25.9 (23.4–28)

26.1 (23.9–28.7)

26.0 (23.9–28.6)

0.688

Missing

5 (1.7%)

5 (0.7%)

1 (0.1%)

Preoperative PSA (ng/ml)

5.9 (4.5–7.9)

7.5 (5–12)

13.4 (8.5–22.8)

< 0.001

Missing

0 (0%)

0 (0%)

0 (0%)

Clinical Stage

< 0.001

T1c

238 (85%)

594 (81.6%)

61 (62.2%)

T2

42 (15%)

126 (17.3%)

27 (27.6%)

T3

0 (0%)

8 (1.1%)

10 (10.2%)

Missing

0 (0%)

0 (0%)

0 (0%)

Biopsy Gleason Score

< 0.001

6

248 (88.6%)

119 (16.3%)

9 (9.2%)

7a

22 (7.9%)

325 (44.6%)

27 (27.6%)

7b

9 (3.2%)

141 (19.3%)

19 (19.4%)

8

0 (0%)

83 (11.4%)

17 (17.3%)

9–10

0 (0%)

54 (7.5%)

24 (24.4%)

Missing

1 (0.4%)

7 (1.0%)

2 (2.0%)

D’Amico Risk Group

< 0.001

Low

196 (70%)

63 (8.6%)

2 (2%)

Intermediate

67 (23.9%)

450 (61.7%)

26 (26.5%)

High

17 (6.1%)

216 (29.6%)

70 (71.4%)

Missing

0 (0%)

0 (0%)

0 (0%)

Nerve sparing, any

237 (85.3%)

447 (61%)

30 (31.9%)

< 0.001

Missing

2 (0.7%)

3 (0.4%)

4 (4%)

Hemoglobin difference (g/l)

3.4 (2.6–4.3)

2.9 (2.3–3.7)

2.8 (2.1–3.8)

0.756

Missing

18 (6.4%)

41 (5.6%)

2 (2%)

Positive surgical margins

76 (27.1%)

209 (28.7%)

53 (54.1%)

< 0.001

pT Stage

< 0.001

pT2a-T2c

249 (88.9%)

499 (68.4%)

9 (9.2%)

pT3a

23 (8.2%)

176 (24.1%)

41 (41.8%)

pT3b-pT4^a

6 (2.1%)

50 (6.9%)

44 (44.9%)

Missing

2 (0.7%)

4 (0.5%)

4 (4.1%)

Gleason Score

< 0.001

6

117 (41.5%)

47 (6.4%)

0 (0%)

7a

114 (41%)

332 (45.6%)

12 (12.2%)

7b

37 (13.2%)

195 (26.7%)

20 (20.4%)

8

8 (2.9%)

58 (8%)

22 (22.4%)

9–10

2 (0.7%)

96 (13.1%)

39 (39.8%)

Missing

2 (0.7%)

1 (0.1%)

5 (5.1%)

Number of resected LNs

–

19 (13–24)

19 (15–27)

0.307