<prompt> Which of the following characteristics is not of much impoance in a screening test-Low costHigh safety marginHigh sensitivityHigh specificity  <response>: ref: ref: Park;s 23rd edition pg 137 Screening test must satisfy the criteria of acceptability, repeatablity and validity, desides others like yield, simplicity, safety, rapidity, ease of administration and cost. Specificity: defined as the ability of a test to correctly identify those who do not have the diesase, that is true negatives. A screening test need not have high specificity. 