Data Collectionmedium
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A researcher wants to investigate whether vitamin supplements reduce heart disease risk. She considers two designs:
Study A (Prospective): Enroll 5,000 disease-free adults, measure current supplement use, follow for 10 years, record who develops disease.
Study B (Retrospective): Identify 500 newly diagnosed heart disease patients and 500 matched disease-free controls, ask all about supplement use over the past 10 years.
Which statement best identifies a specific methodological advantage of Study A?
A researcher wants to investigate whether vitamin supplements reduce heart disease risk. She considers two designs:
Study A (Prospective): Enroll 5,000 disease-free adults, measure current supplement use, follow for 10 years, record who develops disease.
Study B (Retrospective): Identify 500 newly diagnosed heart disease patients and 500 matched disease-free controls, ask all about supplement use over the past 10 years.
Which statement best identifies a specific methodological advantage of Study A?