Table 2.
TTMB parameters of the study population
| Continuous variable | Number of biopsy sessions | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 (n=79) | 2 (n=146 | 3 (n=84) | ⩾4 (n=64) | P | Total (n=373) | ||||||
| Mean | Median | Mean | Median | Mean | Median | Mean | Median | Mean | Median | ||
| No. mapping biopsy coresa | 55.1 | 55.0 | 54.7 | 58.0 | 53.2 | 58.0 | 52.1 | 58.0 | 0.323 | 54.0 | 57.0 |
| Prostate volume | |||||||||||
| Volumetric | 52.7 | 45.1 | 61.8 | 55.4 | 73.2 | 62.7 | 89.5 | 75.0 | <0.001 | 67.2 | 58.0 |
| Ellipsoid | 46.2 | 39.8 | 54.5 | 49.0 | 65.6 | 57.9 | 78.9 | 66.8 | <0.001 | 59.4 | 51.2 |
| TZ volume | |||||||||||
| Ellipsoid | 19.2 | 15.2 | 25.4 | 18.5 | 34.2 | 26.8 | 43.1 | 32.8 | <0.001 | 29.1 | 21.2 |
| Prebiopsy PSA | 5.6 | 4.8 | 7.0 | 5.4 | 9.1 | 8.6 | 13.6 | 9.3 | <0.001 | 8.3 | 6.3 |
| PSAD | 0.15 | 0.11 | 0.16 | 0.12 | 0.17 | 0.14 | 0.22 | 0.14 | 0.291 | 0.17 | 0.12 |
| TZ PSAD | 0.42 | 0.30 | 0.49 | 0.29 | 0.46 | 0.31 | 0.53 | 0.30 | 0.859 | 0.48 | 0.30 |
| TZ index | 0.42 | 0.37 | 0.41 | 0.40 | 0.46 | 0.48 | 0.50 | 0.51 | 0.017 | 0.44 | 0.42 |
Abbreviations: PSA, prostate specific antigen; PSAD, prostate specific antigen density; TTMB, transperineal template-guided mapping biopsy; TZ, transition zone.
a
Most recent mapping biopsy.
Bold indicates statistically significant.