alzheimer

0th

Percentile

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

Aliases
  • alzheimer
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)
# }
Documentation reproduced from package coin, version 1.3-1, License: GPL-2

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