Mammogram -ve (no indication of risk factor present)
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Get it written →100,000 women receive a mammogram, after the 2 groups of women (based on the mammogram) are followed for a 5 year period for tracking breast cancer diagnosis.
Yes – Breast cancer diagnosis (in 5 year follow up period) No – Breast cancer diagnosis (in 5 year followup period)
Mammogram + ve (indication of risk factor present) 10 90
Mammogram -ve (no indication of risk factor present) 20 99,980
1. What type of study is this? Why?
2. Calculate the relative risk of having a breast cancer diagnosis among women with a positive mammogram, when compared to women with a negative mammogram.
3. Why are we able to calculate the relative risk for this data? Is it possible to also calculate odds and why? (provide answers for all these questions and show all work)
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