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.
data(schizo)A data frame with 1603 observations on 437 subjects. Five vectors contain information on
idpatient ID.
imps79original response measurements on a numerical scale.
imps79oordinal response on a 4 category scale, "normal or borderline mentally ill" < "mildly or moderately ill", "markedly ill", "severely or among the most extremely ill".
txtreatment indicator: 1 for drug, 0 for placebo.
weekweek.
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.