The ohio data frame has 2148 rows and 4 columns. The dataset is a subset of the six-city study, a longitudinal study of the health effects of air pollution.
This data frame contains the following columns:
resp
an indicator of wheeze status (1=yes, 0=no)
id
a numeric vector for subject id
age
a numeric vector of age, 0 is 9 years old
smoke
an indicator of maternal smoking at the first year of the study
References
Fitzmaurice, G.M. and Laird, N.M. (1993) A likelihood-based method for analyzing longitudinal binary responses, Biometrika 80: 141–151.
Use the following R code to directly access this dataset in R.
