coin (version 1.4-4)

alzheimer: Smoking and Alzheimer's Disease

Description

A case-control study of smoking and Alzheimer's disease.

Usage

alzheimer

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".

Details

Subjects with Alzheimer's disease are compared to two different control groups with respect to smoking history. The data are given in |salibhillier1997|Tab. 4.

Examples

## 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)