Relief of heartburn Data

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Description

The data are from two period cross-over design clinical trial for relief of heartburn, and listings of the data appear in Koch, Gitomer, Skalland, and Stokes (1983). The variables are as follows:

Usage

1

Format

A data frame with 60 observations and 9 variables.

Details

center

a factor vector for two centers

sequence

a factor with levels AP and PA for sequence groups

age

a numeric vector for age

sex

a factor for sex with levels female and male

freq

a numeric vector for weekly frequency of condition from previous medical history

MD1

a numeric vector for time to relief from first dose during period 1

MD2

a numeric vector for time to relief from first dose during period 2

res1

a factor vector for relief status for period 1 (R = relief from first dose within 15 min, NF = no relief from first dose within 15 min)

ref2

a factor vector for relief status for period 2 with same categories as res1

References

Koch G, Gitomer S, Skalland L, Stokes M (1983). "Some non-parametric and categorical data analyses for a change-over design study and discussion of apparent carry-over effects." Statistics in Medicine, 2(3), 397–412.