PUB210 Concepts Of Epidemiology - Assessment Task 2

In a case-control study looking at the relationship between having freckles and risk of melanoma, 136 of 183 cases and 61 of 183 controls had freckles.

1. In this group, what was the odds ratio for melanoma and having freckles? Interpret this odds ratio. (2 marks)
2. Estimate the attributable fraction of having freckles for melanoma. Interpret this estimate, including relevant assumptions. Explain why an estimate of the attributable fraction is used. (2 marks)