What type of study design was utilized in determining the association between melanoma and tanning bed use?

• A. Randomized control trial
• B. Longitudinal cohort study
• C. Matched case-control study
• D. Cross-sectional study

Answer: (C)

A matched case-control study is particularly suited for examining associations between a specific health outcome, such as melanoma, and an exposure, such as tanning bed use. In this type of study, two groups are compared: one group consisting of individuals with the condition (cases) and another group without the condition (controls). By matching cases and controls on key characteristics, researchers can control for confounding variables that might influence the outcome.

This study design is beneficial in situations where the condition of interest, like melanoma, is relatively rare, as it allows researchers to efficiently collect data on exposures in those affected and compare it to those not affected. In this context, the researchers would likely gather information about tanning bed usage from both groups to assess how much the exposure is associated with the development of melanoma.

The focus on comparison gives a clearer insight into the direct relationship between tanning bed use and the risk of developing melanoma, supporting a more refined understanding of causation.