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DPpackage (version 1.1-0)

psychiatric: Psychiatric Clinical Trial

Description

This data set consider information from a pychiatric clinical trial, reported by Hedeker and Gibbons (1994) and collected in the NIMH Schizophrenia Collaborative Study on treatment-related changes in overall severity. For each patient, the Impatient Multidimensional Psychiatric Scale was scored. In this study, 437 patients were randomly assigned to receive one of four medications: placebo, chlorpromazine, fluphenazine, or thioridazine.

Usage

data(psychiatric)

Arguments

source

Hedeker, D. and Gibbons, R.D. (1994) A random-effects ordinal regression model for multilevel data. Biometrics, 50: 933-944.

References

Hedeker, D. and Gibbons, R.D. (1994) A random-effects ordinal regression model for multilevel data. Biometrics, 50: 933-944.

Examples

Run this code
data(psychiatric)
## maybe str(psychiatric) ; plot(psychiatric) ...

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