| alzheimer {MNB} | R Documentation |
Alzheimer data
Description
The Alzheimer’s data is presented in Hand and Taylor (1987) and Hand and Crowder (1996) to assess deterioration aspects of intellect, self-care and personality in senile patients with Alzheimer’s disease. Two groups of patients were compared, one of which received a placebo and the other treatment with lecithin. In the data, each of the subjects, 26 in the placebo group and 22 in the lecithin group, were measured on five occasions (initially, 1st, 2nd, 4th and 6th). The measurements were the number of words that the patients could recalled from lists of words.
Usage
data(alzheimer)
Format
This data frame contains the following columns:
Y: The number of words that the patients could recalled from lists of words.
trt: Placebo ano lecithin groups.
ind: Indicator on the ith patient.
time: initially, 1st, 2nd, 4th and 6th visit.
References
Hand, D. J. and Crowder, M. (1996). Practical Longitudinal Data Analysis. London: Chapman and Hall.
Hand, D. J. and Taylor, C. C. (1987). Analysis of Variance and Repeated Measures. London: Chapman and Hall.
Fabio, L. C., Villegas, C., Carrasco, J. M. F., and de Castro, M. (2021). D Diagnostic tools for a multivariate negative binomial model for fitting correlated data with overdispersion. Communications in Statistics - Theory and Methods. https://doi.org/10.1080/03610926.2021.1939380.
Residual analysis for discrete correlated data in the multivariate approach. Submitted.
Examples
data(alzheimer)
head(alzheimer)