A new antibody test detects serum antibodies against virus X…
A new antibody test detects serum antibodies against virus X (sensitivity 99%, specificity 90%). When applied in a group of hospitalized patients diagnosed as having virus X infections, the test is found to have a positive predictive value of 85%. When used to screen a group of healthy blood donors for virus X infections, the test is found to have a positive predictive value of 30%. Which of the following best explains this difference between the positive predictive values?
Read DetailsPsychosocial “clubs” or “clubhouses” for patients with schiz…
Psychosocial “clubs” or “clubhouses” for patients with schizophrenia have been formed as a part of some rehabilitation programs. Research indicates that participation in these clubs may help prevent relapses. However, it is difficult to interpret the improvement in these patients because
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