alzheimer
From coin v1.3-1
by Torsten Hothorn
Smoking and Alzheimer's Disease
A case-control study of smoking and Alzheimer's disease.
- Keywords
- datasets
Usage
alzheimer
Details
Subjects with Alzheimer's disease are compared to two different control groups with respect to smoking history. The data are given in Salib and Hillier (1997, Tab. 4).
Format
A data frame with 538 observations on 3 variables.
smoking
a factor with levels
"None"
,"<10"
,"10-20"
and">20"
(cigarettes per day).disease
a factor with levels
"Alzheimer"
,"Other dementias"
and"Other diagnoses"
.gender
a factor with levels
"Female"
and"Male"
.
References
Hothorn, T., Hornik, K., van de Wiel, M. A. and Zeileis, A. (2006). A Lego system for conditional inference. The American Statistician 60(3), 257--263. 10.1198/000313006X118430
Examples
# NOT RUN {
## Spineplots
op <- par(no.readonly = TRUE) # save current settings
layout(matrix(1:2, ncol = 2))
spineplot(disease ~ smoking, data = alzheimer,
subset = gender == "Male", main = "Male")
spineplot(disease ~ smoking, data = alzheimer,
subset = gender == "Female", main = "Female")
par(op) # reset
## Asymptotic Cochran-Mantel-Haenszel test
cmh_test(disease ~ smoking | gender, data = alzheimer)
# }
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