The dataset is a subset of the longitudinal cohort of Washington University (WU)
Alzheimer's Disease Research Center (ADRC). In the AL dataset, measurements of 14 neuropsychological markers
were collected on 118 independent individuals of age 75. The individuals were classified into 3 groups based on
publsihed clinical demential rating (CDR).
Usage
data(AL)
Format
A data frame with 118 observations on the following 15 variables.
group
a factor with levels D^-, D^0D^+, the D^- group has CDR (clinical demential
rating)=0, i.e., no dementia group; the D^0 group has
CDR=0.5, i.e., mild dementia and the D^+ group has CDR=1,
Alzheimer's disease.
FACTOR1
a numeric vector, measurements on the
neuropsychometric test for “global factor”.
ktemp
a numeric vector, measurements on the
neuropsychometric test for “temporal factor”.
kpar
a numeric vector, measurements on the
neuropsychometric test for “parietal factor”.
kfront
a numeric vector, measurements on the
neuropsychometric test for “frontal factor”.
zpsy004
a numeric vector, measurements on the
neuropsychometric test for “longical memory”.
zpsy005
a numeric vector, measurements on the
neuropsychometric test for “digital span forward”.
zpsy006
a numeric vector, measurements on the
neuropsychometric test for “digital span backward”.
zinfo
a numeric vector, measurements on the
neuropsychometric test for “information”.
zbentc
a numeric vector, measurements on the
neuropsychometric test for “visual retention (10s)”.
zbentd
a numeric vector, measurements on the
neuropsychometric test for “visual retention (copy)”.
zboston
a numeric vector,a numeric vector,
measurements on the neuropsychometric test for “boston
naming”.
zmentcon
a numeric vector,measurements on the
neuropsychometric test for “mental control”.
zworflu
a numeric vector,measurements on the
neuropsychometric test for “word fluency”.
zassc
a numeric vector,measurements on the
neuropsychometric test for “associate learning”.
Details
See references for more details on the explanation of the 14 markers
and scoring details.
Source
Xiong, C. and van Belle, G. and Miller, J.P. and Morris, J.C. (2006)
Measuring and Estimating Diagnostic Accuracy When There
Are Three Ordinal Diagnostic Groups. Statistics In Medicine25
7 1251–1273.
Sorandt M, Hill RD. (1989) Very mild snile dementia of the Alzheimer type. II
Psychometric test performance. Archives of Neurology46 383–386.
Examples
data(AL)
## maybe str(AL) ; plot(AL); ...
Results
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
> library(DiagTest3Grp)
Loading required package: car
Loading required package: KernSmooth
KernSmooth 2.23 loaded
Copyright M. P. Wand 1997-2009
Loading required package: gplots
Attaching package: 'gplots'
The following object is masked from 'package:stats':
lowess
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/DiagTest3Grp/AL.Rd_%03d_medium.png", width=480, height=480)
> ### Name: AL
> ### Title: Alzheimer's disease neuropsychometric marker dataset
> ### Aliases: AL
> ### Keywords: datasets
>
> ### ** Examples
>
> data(AL)
>
> ## maybe str(AL) ; plot(AL); ...
>
>
>
>
>
> dev.off()
null device
1
>