Research Article
Analysis of Learning Curve in Robot-Assisted Radical Prostatectomy Performed by a Surgeon
Table 1
Preoperative clinical characteristics of the patients.
| | Characteristics | Median value | Group 1 (1–49) | Group 2 (50–88) | Group 3 (89–145) | value |
| | Age (years) | | | | | | | Mean ± SD | 62.18 ± 6.76 | 61.29 ± 6.73 | 63.56 ± 6.75 | 62.00 ± 6.76 | 0.42 | | Median (IQR) | 62 (57.5–67) | 62 (57–67) | 63 (60–68) | 62 (57–66.5) | | BMI | | | | | | | Mean ± SD | 27.24 ± 3.85 | 26.76 ± 3.91 | 27.28 ± 4.71 | 27.64 ± 3.11 | 0.52 | | Median (IQR) | 27.0 (25.0–28.7) | 27.1 (24.6–28.5) | 26.5 (24.6–29.0) | 27.0 (25.6–29.0) | | IIEF-5, n (%) | | | | | | | 21–25 points | 60 (53.1) | 17 (53.1) | 13 (46.4) | 30 (56.6) | 0.35 | | 16–20 points | 24 (21.2) | 8 (25.0) | 4 (14.3) | 12 (22.6) | | 11–15 points | 10 (8.8) | 4 (12.5) | 2 (7.1) | 4 (7.5) | | 0–10 points | 19 (16.8) | 3 (9.4) | 9 (32.1) | 7 (13.2) | | PSA (ng/ml) | | | | | | | Mean ± SD | 9.24 ± 6.86 | 8.48 ± 5.97 | 8.71 ± 5.65 | 10.25 ± 8.19 | 0.553 | | Median (IQR) | 7.47 (5.5–9.8) | 7.47 (5.6–9.1) | 6.97 (5.3–9.9) | 8.00 (5.7–10.6) | | Prostate volume (cm3) | | | | | | | Mean ± SD | 39.84 ± 17.14 | 38.53 ± 17.57 | 41.74 ± 20.87 | 39.58 ± 13.82 | 0.55 | | Median (IQR) | 36.0 (29.0–47.5) | 33.0 (26.5–49.5) | 34.00 (29–50) | 40 (30.00–45.5) | | Clinical stage, n (%) | | | | | | | сТ1 | 90 (62.1) | 34 (69.4) | 23 (59.0) | 33 (57.9) | 0.8 | | сТ2 | 40 (27.6) | 11 (22.4) | 13 (33.3) | 16 (28.1) | | сТ3 | 15 (10.3) | 4 (8.2) | 3 (7.7) | 8 (14.0) | | Biopsy Gleason score, n (%) | | | | | | | ≤6 | 89 (61.4) | 32 (65.3) | 28 (71.8) | 29 (50.9) | 0.08 | | =7 | 48 (33.1) | 17 (34.7) | 10 (25.6) | 21 (36.8) | | ≥8 | 8 (5.5) | 0 (0) | 1 (2.6) | 7 (12.3) | | D’Amico risk, n (%) | | | | | | | Low | 78 (53.8) | 28 (57.1) | 29 (74.4) | 21 (36.8) | 0.128 | | Median | 38 (26.2) | 14 (28.6) | 5 (12.8) | 19 (33.3) | | High | 29 (20) | 7 (14.3) | 5 (12.8) | 17 (29.8) | | Briganti lymph node invasion, n (%) | | | | | | | <5% | 92 (63.4) | 34 (69.4) | 26 (66.7) | 32 (56.1) | 0.33 | | ≥5% | 53 (36.6) | 15 (30.6) | 13 (33.3) | 25 (43.9) |
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