Description

Dataset from a cohort study of exposure to arsenic from industry and deaths from respiratory diseases.

Usage

Format

A data frame with 114 observations on the following 6 variables.

respdeath

a numeric vector indicating number of deaths from respiratory diseases

personyrs

a numeric vector indicating person-years of exposure

agegr

a numeric vector: 1=40-49, 2=50-59, 3=60-69, 4=70-79)

period

a numeric vector: 1=1938-1949, 2=1950-1959, 3=1960-1969, 4=1970-1977

starting

a numeric vector indicating starting period: 1=pre-1925, 2=1925 & after

arsenic

a numeric vector indicating years of exposure: 1=<1 year, 2=1-4 years, 3=5-14 years, 4=15+ years