Vc1to1: Datasets on a matched case-control study of esophageal cancer

Description Usage Format Source See Also Examples

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

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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

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

Example output

Loading required package: foreign
Loading required package: survival
Loading required package: MASS
Loading required package: nnet
 
 No. of observations =  119 
  Variable      Class           Description
1 matset        integer                    
2 case          integer                    
3 smoking       integer                    
4 rubber        integer                    
5 alcohol       integer                    

Exposure status: alcohol = 1 
 
Total number of match sets in the tabulation = 26 
 
Number of controls = 1 
                    No. of controls exposed
No. of cases exposed 0 1
                   0 2 0
                   1 1 0

Number of controls = 2 
                    No. of controls exposed
No. of cases exposed 0 1 2
                   0 0 0 1
                   1 2 0 0

Number of controls = 3 
                    No. of controls exposed
No. of cases exposed 0 1 2 3
                   0 2 2 0 0
                   1 1 1 1 0

Number of controls = 4 
                    No. of controls exposed
No. of cases exposed 0 1 2 3 4
                   0 0 0 1 0 0
                   1 0 2 2 1 0

Number of controls = 5 
                    No. of controls exposed
No. of cases exposed 0 1 2 3 4 5
                   0 1 0 0 0 0 0
                   1 1 0 1 0 0 0

Number of controls = 6 
                    No. of controls exposed
No. of cases exposed 0 1 2 3 4 5 6
                   0 0 0 0 0 0 0 0
                   1 0 0 2 1 0 0 1

Odds ratio by Mantel-Haenszel method = 5.386 
 
Odds ratio by maximum likelihood estimate (MLE) method = 5.655 
 95%CI= 1.811 , 17.659 
 

epiDisplay documentation built on May 11, 2018, 1:04 a.m.