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6806 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? Trisomy 21 Normal Karyotype Positive Test 100 50 Negative Test 100 250

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