Description Usage Format Details References
The data are from a multicenter randomized clinical trial to compare test and control treatments for the management of chronic pain, and they have had previous consideration in Stokes et al. (2000, chap. 13).
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A data frame with 193 observations and 4 variables
treata factor with levels active and placebo for treatment
responsea factor with five levels poor, fair, moderate, good and excel for pain status after treatment for 4 weeks
centera factor with two levels I and II for two centers
diagnosisa factor with four levels A, B, C, and D for diagnoses
Stokes, M. E., Davis, C. S., and Koch, G. G. (2000), Categorical Data Analysis using the SAS System, Cary: SAS Publishing.
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