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:
A data frame with 60 observations and 9 variables.
a factor vector for two centers
a factor with levels
PA for sequence groups
a numeric vector for age
a factor for sex with levels
a numeric vector for weekly frequency of condition from previous medical history
a numeric vector for time to relief from first dose during period 1
a numeric vector for time to relief from first dose during period 2
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)
a factor vector for relief status for period 2 with same categories as
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.
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