In a research study,subjects in one group decrease their intake of saturated fat and cholesterol,and those in a control group maintain their current level of intake for 2 years,with regular monitoring of risk factors for cardiovascular disease.This type of research study is called a(n)

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In experimental studies,researchers compare health outcomes of subjects who receive treatment or intervention with those of subjects in a control group,who receive no treatment or intervention.In epidemiologic studies,researchers track the occurrence of health or disease processes among populations to determine possible causative factors.In case studies,researchers examine individual cases of disease or health problems."Monitoring studies" is not a recognized research term.

In a Research Study,subjects in One Group Decrease Their Intake