Rheumatoid self-assessment scores for 302 patients, measured on a five-level ordinal response scale at three follow-up times.
A data frame with 888 observations on the following 8 variables:
id
Patient identifier variable.
y
Self-assessment score of rheumatoid arthritis measured on a five-level ordinal response scale.
sex
Coded as (1) for female and (2) for male.
age
Recorded at the baseline.
trt
Treatment group variable, coded as (1) for the placebo group and (2) for the drug group.
baseline
Self-assessment score of rheumatoid arthritis at the baseline.
time
Follow-up time recorded in months.
Source
Lipsitz, S.R. and Kim, K. and Zhao, L. (1994) Analysis of repeated categorical data using generalized estimating equations. Statistics in Medicine, 13, 1149–1163.
Use the following R code to directly access this dataset in R.
