Schizophrenia data from a randomized controlled trial with patients assigned to either drug or placebo group. "Severity of Illness" was measured, at weeks 0, 1, ..., 6, on a four category ordered scale. Most of the observations where made on weeks 0, 1, 3, and 6.
A data frame with 1603 observations on 437 subjects. Five vectors contain information on
original response measurements on a numerical scale.
ordinal response on a 4 category scale, "normal or borderline mentally ill" < "mildly or moderately ill", "markedly ill", "severely or among the most extremely ill".
treatment indicator: 1 for drug, 0 for placebo.
The documentation file was copied from the mixcat package and slightly modified.
Hedeker, D. and R. Gibbons (2006). Longitudinal Data Analysis. New Jersey, USA: John Wiley & Sons.
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