schiz {sabreR} | R Documentation |
In this example we analyse ordinal data on changes in the severity of Schizophrenia in data from the National Institute of Mental Health (NIMH), see Rabe-Hesketh and Skrondal (2005, Ch 5). Patients were randomly allocated to 1 of 4 treatments (Placebo, Chlorpromazine, Fluphenazine, Thioridazine) and examined weekly for up to 6 weeks. The data have previously been analysed by Hedeker and Gibbons (1996a), Gibbons et al. (1998) and Gibbons and Hedeker (1994). In this example we follow Rabe-Hesketh and Skrondal (2005, Ch 5) and combine the treatments Chlorpromazine, Fluphenazine and Thioridazine.
schiz
A data frame containing 1603 rows and 8 columns.
National Institute of Mental Health (NIMH)
Gibbons, R. D., Hedeker, C., Waterneaux, C., & Davis, J.M., (1988), Random regression models: A comprehensive approach to the analysis of longitudinal psychiatric data, Psychopharmacology Bulletin, 24, 438-443
Gibbons, R. D., & Hedeker, C., (1994), Application of random effects probit regression models, Journal of Consulting and Clinical Psyschology.
Hedeker, D., & Gibbons, R.D., (1996), Applied longitudinal data anlaysis, Chichester, UK, Wiley
Rabe-Hesketh, S., and Skrondal, A., (2005), Multilevel and Longitudinal Modelling using Stata, Stata Press, Stata Corp, College Station, Texas.