Researchers Want to Estimate the Association Between Environmental Lead Exposure

question 88

Multiple Choice

Researchers want to estimate the association between environmental lead exposure and cognitive deficits in children.  Among all children who received preventive care at 5 local pediatric clinics over the last 5 years, they identify 20 children diagnosed with cognitive deficits and 40 without the diagnosis.  The researchers then review the patients' medical records and calculate the distance between the patients' residence and known lead-contaminated geographic areas.  Which of the following best describes the study design used by the researchers?

• A)Case-control study
• B)Case series study
• C)Cross-sectional study
• D)Prospective cohort study
• E)Randomized control trial

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