schizo: National Institute of Mental Health shizophrenia study
Description
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.Format
A data frame with 1603 observations on 437 subjects. Five vectors
contain information on
id
- patient ID.
imps79
- original response measurements on a numerical
scale.
imps79o
- 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".
tx
- treatment indicator: 1 for drug, 0 for placebo.
week
- week.
Details
The documentation file was copied from the mixcat package
and slightly modified.References
Hedeker, D. and R. Gibbons (2006). Longitudinal Data
Analysis. New Jersey, USA: John Wiley & Sons.