Question

The percentage of women who get breast cancer sometime during their lifetime is higher now than in 1900. Suppose that breast cancer incidence tends to increase with age, and suppose that women tend to live longer now than in 1900. Explain why a comparison of breast cancer rates now with the rate in 1900 could show different results if we control for the age of the woman.


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  • CreatedSeptember 11, 2015
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