Data from the famous doctors study of smoking conducted by Sir Richard Doll
and colleagues
Usage
data(doctors)
Arguments
Format
A tibble with 10 observations and the following 4 variables.
age
age group
smoking
smoker or non-smoker
deaths
number of deaths
person-years
person years of of observation at the time of the analysis
References
Breslow, N. E. and N. E. Day (1987). Statistical Methods in Cancer Research,
Volume 2: The Design and Analysis of Cohort Studies. Lyon: International
Agency for Research on Cancer.