nbme 4

[firstaid2012]

Twenty children are treated in the emergency department for bloody diarrhea. To study this outbreak, the health department interviews 40 children without bloody diarrhea matched by age and neighbcrhood. The study shows that 18 of the 20 children with bloody diarrhea went to the local county fair and 10 of the 40 children who did not have bloody diarrhea went to the fair. Which of the following best describes this study design?
A) Case-control answer key says this is the answer
B) Case series
C) Crossover
D) Cross-sectional i picked this
E) Historical cohort
F) Prospective cohort
G) Randomized clinical trial

please explain

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[LuckiestOne]

Twenty children are treated in the emergency department for bloody diarrhea. To study this outbreak, the health department interviews 40 children without bloody diarrhea matched by age and neighbcrhood. The study shows that 18 of the 20 children with bloody diarrhea went to the local county fair and 10 of the 40 children who did not have bloody diarrhea went to the fair. Which of the following best describes this study design?
A) Case-control answer key says this is the answer
B) Case series
C) Crossover
D) Cross-sectional i picked this
E) Historical cohort
F) Prospective cohort
G) Randomized clinical trial

please explain

Cross sectional is used to find the prevalence of a certain disease. Here, you aren't trying to find the prevalence of the disease but looking for the cause of the disease.

Case control is the only one that specifically looks for the cause of the disease.