A school nurse was concerned about the prevalence of obesity in the elementary school classes.On the basis of the literature,the nurse decided to ask each student whether he or she ate breakfast before coming to school in the morning.Which type of study is the nurse conducting?

Question

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In a correlational study,investigators look for associations between two factors-in this case,between obesity and possible contributing factors.Experimental studies must involve two groups of people: a control group and an experimental group.Case-control studies are retrospective because the study begins after the health outcome has already occurred.In this case,a case-control study would be performed if only the obese children were asked the question.A clinical trial is similar to an experimental study.

A School Nurse Was Concerned About the Prevalence of Obesity