arthritis:
Rheumatoid Arthritis Clinical Trial
Description
Rheumatoid self-assessment scores for 302 patients, measured on a five-level ordinal response scale at three follow-up times.
Format
A data frame with 888 observations on the following 7 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.