Table 3.
GPs' knowledge of positive predictive value of prostate cancer screening methods
| Knowledge of PPV | Number (n=196) | Per cent |
|---|---|---|
| PPV of PSA | ||
| Correct estimation <30% | 54 | 27.6 |
| Overestimate >30% | 124 | 63.3 |
| Not sure | 18 | 9.2 |
| PPV of DRE | ||
| Correct estimation <30% | 50 | 25.5 |
| Overestimate >30% | 111 | 56.6 |
| Not sure | 35 | 17.9 |
| PPV of PSA and DRE | ||
| Correct estimation <50% | 47 | 24.0 |
| Overestimate >50% | 126 | 64.3 |
| Not sure | 23 | 11.7 |
GPs, general practitioners; DRE, digital rectal examination; PSA, prostrate-specific antigen; PPV, positive predictive value.