Outbreak investigation {epicalc}R Documentation

Dataset from an outbreak of food poisoning on a sportsday, Thailand 1990.

Description

This dataset contains information from an outbreak investigation concerning food poisoning on a sportsday in Thailand 1990.

Dichotomous variables for exposures and symptoms were coded as follow:

0 = no
1 = yes
9 = missing or unknown

Usage

data(Outbreak)

Format

A data frame with 1094 observations on the following 13 variables.

id
a numeric vector
sex
a numeric vector

0 = female
1 = male

age
a numeric vector: age in years

99 = missing

exptime
an AsIs or character vector of exposure times
beefcurry
a numeric vector: whether the subject had eaten beefcurry
saltegg
a numeric vector: whether the subject had eaten salted eggs
eclair
a numeric vector: pieces of eclair eaten

80 = ate but could not remember how much
90 = totally missing information

water
a numeric vector: whether the subject had drunk water
onset
an AsIs or character vector of onset times
nausea
a numeric vector
vomiting
a numeric vector
abdpain
a numeric vector: abdominal pain
diarrhea
a numeric vector

References

Thaikruea, L., Pataraarechachai, J., Savanpunyalert, P., Naluponjiragul, U. 1995 An unusual outbreak of food poisoning. Southeast Asian J Trop Med Public Health 26(1):78-85.

Examples

data(Outbreak)
use(Outbreak)

# Distribution of reported pieces of eclair taken
tab1(eclair) 

# Defining missing value
recode(eclair, eclair>20, NA) 
pieces.of.eclair <- cut(eclair, c(0,1,2,20), include.lowest=TRUE, right=FALSE)
tabpct(pieces.of.eclair, diarrhea) 

[Package epicalc version 2.10.1.1 Index]