Table 3

GPs' knowledge of positive predictive value of prostate cancer screening methods

Knowledge of PPVNumber (n=196)Per cent
PPV of PSA
 Correct estimation <30%5427.6
 Overestimate >30%12463.3
 Not sure189.2
PPV of DRE
 Correct estimation <30%5025.5
 Overestimate >30%11156.6
 Not sure3517.9
PPV of PSA and DRE
 Correct estimation <50%4724.0
 Overestimate >50%12664.3
 Not sure2311.7
  • GPs, general practitioners; DRE, digital rectal examination; PSA, prostrate-specific antigen; PPV, positive predictive value.