As part of a large-scale epidemiological study, researchers are using a rigorous prospective methodology involving randomly assigned subject groups. What type of study is this?
A) Type I
B) Type III
C) Type IV
D) Type VI
Ans: A
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Type I studies are rigorous and involve random subject assignment. Type III studies have clear limitations, involve heavy bias, and generally are conducted as pilot research. Type IV studies involve secondary data analysis. Type VI studies involve uncontrolled case reports and are of questionable value.
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