Sources of data and Study designs. Go to the following Surveillance Epidemiology and End Results (SEER) website: http://seer.cancer.gov/ Under Fact Sheets – select Skin – Melanoma of the Skin. Click view Fact Sheet and review the information. Notice the low rate of 5-year survival for distant (metastatic disease). You want to evaluate melanoma skin cancer and one risk factor for melanoma. Describe 3 study designs (real or fictitious), an ecologic, a cross-sectional, and a case-control study, to evaluate the association of the melanoma and that risk factor. For each design briefly describe the populations studied and how the risk factor was defined and/or measured. For Discussion: Without quoting from your text, discuss the strengths and weaknesses, and advantages and disadvantages of the designs. When might the strengths outweigh the weaknesses for each type of design? Can you suggest an improvement to one or more of the studies listed?
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