Table 1.
Basic characteristics
| n | Overall | train_set | test_set | P-Value | |
|---|---|---|---|---|---|
| 852 | 596 | 256 | |||
| Result, n (%) | Continence | 614 (72.1) | 430 (72.1) | 184 (71.9) | 1 |
| Incontinence | 238 (27.9) | 166 (27.9) | 72 (28.1) | ||
| Age, mean (SD) | 69.5 (7.1) | 69.6 (7.0) | 69.5 (7.1) | 0.874 | |
| BMI, mean (SD) | 23.8 (3.1) | 23.7 (3.1) | 23.9 (3.1) | 0.478 | |
| Respiratory Disease, n (%) | No | 828 (97.2) | 578 (97.0) | 250 (97.7) | 0.748 |
| Yes | 24 (2.8) | 18 (3.0) | 6 (2.3) | ||
| Diabetes, n (%) | No | 738 (86.6) | 518 (86.9) | 220 (85.9) | 0.784 |
| Yes | 114 (13.4) | 78 (13.1) | 36 (14.1) | ||
| Previous Abdominal Surgery, n (%) | No | 701 (82.3) | 489 (82.0) | 212 (82.8) | 0.865 |
| Yes | 151 (17.7) | 107 (18.0) | 44 (17.2) | ||
| Hypertension, n (%) | No | 461 (54.1) | 329 (55.2) | 132 (51.6) | 0.367 |
| Yes | 391 (45.9) | 267 (44.8) | 124 (48.4) | ||
| Drink, n (%) | No | 760 (89.2) | 526 (88.3) | 234 (91.4) | 0.216 |
| Yes | 92 (10.8) | 70 (11.7) | 22 (8.6) | ||
| Previous TURP, n (%) | No | 766 (89.9) | 532 (89.3) | 234 (91.4) | 0.407 |
| Yes | 86 (10.1) | 64 (10.7) | 22 (8.6) | ||
| PSA, n (%) | ≤20ng/ml | 527 (61.9) | 365 (61.2) | 162 (63.3) | 0.628 |
| >20ng/ml | 325 (38.1) | 231 (38.8) | 94 (36.7) | ||
| Preoperative Albumin, mean (SD) | 43.3 (3.8) | 43.3 (3.7) | 43.2 (4.0) | 0.589 | |
| Preoperative FBG, mean (SD) | 5.9 (1.5) | 5.9 (1.4) | 6.0 (1.5) | 0.749 | |
| Postoperative Albumin, mean (SD) | 33.9 (3.0) | 33.9 (2.9) | 33.9 (3.1) | 0.938 | |
| Postoperative FBG, mean (SD) | 6.8 (2.8) | 6.8 (2.7) | 6.9 (3.0) | 0.499 | |
| Prostate Volume, mean (SD) | 38.6 (19.4) | 38.1 (19.0) | 39.8 (20.4) | 0.278 | |
| MUL, mean (SD) | 11.8 (1.3) | 11.7 (1.3) | 11.8 (1.3) | 0.209 | |
| Operation Duration, mean (SD) | 161.1 (52.1) | 159.6 (52.5) | 164.4 (51.3) | 0.212 | |
| Hb Change, mean (SD) | 19.0 (9.4) | 19.1 (9.6) | 18.8 (8.8) | 0.67 | |
| PLND, n (%) | No | 494 (58.0) | 341 (57.2) | 153 (59.8) | 0.538 |
| Yes | 358 (42.0) | 255 (42.8) | 103 (40.2) | ||
| Tstage, n (%) | T1-2 | 648 (76.1) | 447 (75.0) | 201 (78.5) | 0.31 |
| T3 | 204 (23.9) | 149 (25.0) | 55 (21.5) | ||
| Gleason Score, n (%) | 6 | 126 (14.8) | 92 (15.4) | 34 (13.3) | 0.369 |
| 7 | 428 (50.2) | 290 (48.7) | 138 (53.9) | ||
| 8 | 133 (15.6) | 91 (15.3) | 42 (16.4) | ||
| 9 | 156 (18.3) | 115 (19.3) | 41 (16.0) | ||
| ISUP, n (%) | 1 | 126 (14.8) | 92 (15.4) | 34 (13.3) | 0.501 |
| 2 | 233 (27.3) | 158 (26.5) | 75 (29.3) | ||
| 3 | 195 (22.9) | 132 (22.1) | 63 (24.6) | ||
| 4 | 133 (15.6) | 91 (15.3) | 42 (16.4) | ||
| 5 | 165 (19.4) | 123 (20.6) | 42 (16.4) | ||
| 10 | 9 (1.1) | 8 (1.3) | 1 (0.4) | ||
| PNI, n (%) | Negative | 204 (23.9) | 146 (24.5) | 58 (22.7) | 0.624 |
| Positive | 648 (76.1) | 450 (75.5) | 198 (77.3) | ||
| LVI, n (%) | Negative | 733 (86.0) | 517 (86.7) | 216 (84.4) | 0.42 |
| Positive | 119 (14.0) | 79 (13.3) | 40 (15.6) | ||
| Basal Margin, n (%) | Negative | 775 (91.0) | 538 (90.3) | 237 (92.6) | 0.343 |
| Positive | 77 (9.0) | 58 (9.7) | 19 (7.4) | ||
| Apical Margin, n (%) | Negative | 745 (87.4) | 527 (88.4) | 218 (85.2) | 0.228 |
| Positive | 107 (12.6) | 69 (11.6) | 38 (14.8) | ||
| Postoperative Hospital Stay, mean (SD) | 6.0 (1.9) | 6.0 (2.0) | 6.0 (1.7) | 0.86 |
SD: standard deviation;
BMI: Body mass index; TURP: Transurethral resection of the prostate; PSA: Prostate-specific antigen; FBG: Fasting blood glucose; MUL: Membranous urethral length;
PLND: Pelvic lymph node dissection; ISUP: International Society of Urological Pathology; PNI: Perineural Invasion; LVI: Lymphovascular Invasion;