Admission test for the degree course in medicine and surgery 2012-2013
Domanda 1 di 80
Approximately 1 in 14 men over the age of 50 has prostate cancer. The level of 'prostate specific antigen' (PSA) is used as a preliminary screening test for prostate cancer. 7% of men with prostate cancer do not have a high level of PSA. These results are known as 'false negatives'. 75% of those men with a high level of PSA do not have cancer. These results are known as 'false positives'. If a man over 50 has a normal level of PSA, what are the chances that he has prostate cancer?