Table 1.
Baseline Characteristics of the Sample
| Open: n=126 | Laparoscopic: n=78 | Robotic: n=136 | |
|---|---|---|---|
| Median age (IQR) | 61.6 (55.9, 65.3) | 62.1 (56.1, 68.2) | 63.3 (57.6, 67.7) |
| Median PSA at diagnosis (IQR) | 6.10 (4.50, 8.81) | 5.75 (4.66, 9.00) | 5.90 (4.60, 7.60) |
| Clinical stage, n (%): | |||
| T1 | 77 (61%) | 50 (64%) | 79 (63%) |
| T2a | 13 (10%) | 16 (21%) | 24 (19%) |
| T2b+ | 36 (29%) | 12 (15%) | 23 (18%) |
| Biopsy Gleason score, n (%) | |||
| 6 | 4 (3%) | 4 (5%) | 5 (4%) |
| 7 | 88 (70%) | 53 (68%) | 98 (78%) |
| 8 | 19 (15%) | 14 (18%) | 12 (10%) |
| Positive surgical margins, n (%) | 24 (19%) | 9 (12%) | 21 (17%) |
| Seminal vesicle invasion, n(%) | 15 (12%) | 8 (10%) | 13 (10%) |
| Extraprostatic extension, n (%) | 59 (47%) | 43 (55%) | 57 (45%) |
| Median predicted risk of LNI (IQR) | 2.87 (2.30, 5.11) | 2.76 (2.31, 4.88) | 2.60 (2.36, 3.98) |
IQR=interquartile range; PSA=prostate-specific antigen; LNI=lymph node involvement.