Matched case-control study {epiDisplay}

Datasets on a matched case-control study of esophageal cancer

Description

Two different datasets for the same matched case-control study. VC1to6 has 1 case : varying number of controls (from 1 to 6) whereas VC1to1 has the number of control reduced to 1 for each case.

Usage

data(VC1to1)

data(VC1to6)

Format

A data frame with the following 5 variables.

matset

a numeric vector indicating matched set number from 1 to 26

case

a numeric vector: 1=case, 0=control

smoking

a numeric vector: 1=smoker, 0=non-smoker

rubber

a numeric vector: 1=exposed, 0=never exposed to rubber industry

alcohol

a numeric vector: 1=drinker, 0=non-drinker

Source

Chongsuvivatwong, V. 1990 A case-control study of esophageal cancer in Southern Thailand. J Gastro Hep 5:391–394.

See Also

'infert' in the datasets package.

Examples

data(VC1to6)
.data <- VC1to6
des(.data)
with(.data, matchTab(case, alcohol, matset))
rm(.data)