Guptashutosh
Forum Elite
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22. A study is conducted to investigate the prevalence of past infection with genital herpes among students attending a large coeducational Midwestern university. After obtaining informed consent, the study participants undergo antibody testing for herpes simplex virus 2 (HSV). Which of the following is the most important factor in determining the validity of a positive test?
A ) The number of sexual partners of the student
B ) The proportion of students infected with HSV
C ) The proportion of students with negative tests
D ) The proportion of students with positive tests
E ) The total number of students screened
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| robin082006
Forum Hero
Topics: 471
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B
Validity refers to getting results that accurately reflect the concept being measured--> i GUESS B
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| r_albayunen
Forum Senior
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B
i guess its not D due to the fact of the false positives.
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| MHP
Forum Senior
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what is the answer?
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| CocaCola
Forum Guru
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B - the proportion of student s who are truly infected with HSV
We can't determine the validity of a test if we don't know who is truly infected... sens and spec can't be calculated...
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