The data studied the effect of air pollution on the health of 16 children. The outcome variable was the wheezing status measured consistently four times yearly at ages of 9, 10, 11, and 12 years.
A data frame with 64 observations on the following 6 variables:
IDchild identifier.
Wheezebinary indicator of wheezing presence.
Citybinary indicator of whether the child lives in Kingston (0 = Portage; 1 = Kingston).
Ageage of child in years ranging from 9 to 12.
Smokemeasure of smoking habits (cigarettes per day) of child's mother.
Hardin, J. and Hilbe, J. (2013).
Generalized Estimating Equations, 2nd edition.
Chapman and Hall, London.
Lipsitz, S. R., Fitzmaurice, G. M., Orav, E. J., and Laird, N. M. (1994). Performance of Generalized Estimating Equations in Practical Situations. Biometrics, 50, 270–278, tools:::Rd_expr_doi("10.2307/2533218").