mammogram {openintro}

Experiment with Mammogram Randomized

Description

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.

Usage

mammogram

Format

A data frame with 89835 observations on the following 2 variables.

treatment

a factor with levels control mammogram

breast_cancer_death

a factor with levels no yes

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)
chisq.test(table(mammogram))