Controls are needed in a case-control study because:
A. They are matched to the cases f...
Biology, 17.04.2020 18:24 kiki197701
Controls are needed in a case-control study because:
A. They are matched to the cases for suspected etiological factors.
B. They may be followed to determine if they develop the disease in question.
C. They increase the sample size, so that statistical significance may be achieved.
D. They provide a comparable estimate of the frequency of exposure in the absence of disease.
E. They reduce bias.
Answers: 2
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