Table 1.
Descriptive Statistics
| Variable | No. | % |
|---|---|---|
| Clinical stage | ||
| T1c | 3560 | 46.1 |
| T2a | 2259 | 29.2 |
| T2b | 819 | 10.6 |
| T2c | 960 | 12.4 |
| T3 | 126 | 1.6 |
| Biopsy Gleason sum | ||
| 4–6 | 5249 | 68.0 |
| 7 | 2043 | 26.5 |
| 8–10 | 432 | 5.6 |
| Pathology Gleason sum | ||
| 4–6 | 3370 | 43.6 |
| 7 | 3847 | 49.8 |
| 8–10 | 507 | 6.6 |
| Extracapsular extension (yes) | 2359 | 30.5 |
| Seminal vesicle involvement (yes) | 746 | 9.7 |
| Pelvic lymph node status (positive) | 302 | 3.9 |
| PSA (ng/mL) | ||
| Minimum | 0.5 | |
| 1st Quartile | 5.0 | |
| Median | 6.8 | |
| Mean | 9.4 | |
| 3rd Quartile | 10.1 | |
| Maximum | 228.6 | |
| Surgery experience (N) | ||
| Minimum | 0.0 | |
| 1st Quartile | 82.8 | |
| Median | 273.0 | |
| Mean | 453.7 | |
| 3rd Quartile | 655.0 | |
| Maximum | 1978.0 | |
| Year of surgery | ||
| Minimum | 1987 | |
| 1st Quartile | 1994 | |
| Median | 1998 | |
| Mean | 1997 | |
| 3rd Quartile | 2001 | |
| Maximum | 2003 | |