Rheumatoid self-assessment scores for 302 patients, measured on a five-level ordinal response scale at three follow-up times.
A data frame with 906 observations on the following 7 variables:
Patient identifier variable.
Self-assessment score of rheumatoid arthritis measured on a five-level ordinal response scale.
Coded as (1) for female and (2) for male.
Recorded at the baseline.
Treatment group variable, coded as (1) for the placebo group and (2) for the drug group.
Self-assessment score of rheumatoid arthritis at the baseline.
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.
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