An experiment where 89,835 women were randomized to either get a mammogram or a non-mammogram breast screening. The response measured was whether they had died from breast cancer within 25 years.
Format
A data frame with 89835 observations on the following 2 variables.
- breast_cancer_death
a factor with levels
noyes
Source
Miller AB. 2014. Twenty five year follow-up for breast cancer incidence and mortality of the Canadian National Breast Screening Study: randomised screening trial. BMJ 2014;348:g366.
Examples
table(mammogram)
#> breast_cancer_death
#> treatment no yes
#> control 44405 505
#> mammogram 44425 500
chisq.test(table(mammogram))
#>
#> Pearson's Chi-squared test with Yates' continuity correction
#>
#> data: table(mammogram)
#> X-squared = 0.01748, df = 1, p-value = 0.8948
#>