Description

Frequency of cancer in 39,876 women taking and not taking aspirin.

Format

A data frame with 39876 observations on the following

treatment

a factor with levels Aspirin and Placebo

cancer

a factor with levels no and yes

Source

Cook, N.R., I. Lee, J.M. Gaziano, D. Gordon, P.M. Ridker, J.E. Manson, C.H. Hennekens, and J.E. Buring. 2005. Low-dose aspirin in the primary prevention of cancer. Journal of the American Medical Association 294: 47-55.

References

http://www.ncbi.nlm.nih.gov/pubmed/15998890

Examples