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174136 Social & Preventive Medicine

An experimental diagnostic test is developed to noninvasively detect the presence of trisomy 21, Down’s syndrome. The test is administered to a group of 500 women considered to be at risk for a Down’s fetus based on blood tests. The results of this test are shown below. What is the sensitivity of this new test? rn rnrnrn rnrnTrisomy 21rnrnrnNormal KaryotypernrnrnrnrnPositive Testrnrnrn100rnrnrn50rnrnrnrnrnNegative Testrnrnrn100rnrnrn250rnrnrnrn

A40%
B50%
C67%
D71%
Social & Preventive Medicine
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