Arthritis {vcd} | R Documentation |
Data from Koch & Edwards (1988) from a double-blind clinical trial investigating a new treatment for rheumatoid arthritis.
data(Arthritis)
A data frame with 84 observations and 5 variables.
Michael Friendly (2000), Visualizing Categorical Data: http://hotspur.psych.yorku.ca/ftp/sas/vcd/catdata/arthrit.sas
G. Koch & S. Edwards (1988), Clinical efficiency trials with categorical data. In K. E. Peace (ed.), Biopharmaceutical Statistics for Drug Development, 403-451. Marcel Dekker, New York.
M. Friendly (2000), Visualizing Categorical Data. SAS Institute, Cary, NC.
data(Arthritis) attach(Arthritis) ftable(table(Treatment, Sex, Improved))