arthritis: Rheumatoid Arthritis Clinical Trial
In weightedScores: Weighted Scores Method for Regression Models with Dependent Data

Description Usage Format Source Examples

Rheumatoid self-assessment scores for 302 patients, measured on a five-level ordinal response scale at three follow-up times.

1	data(arthritis)

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.

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.