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Categorical Data Analysis Using The SAS® System, 2nd Edition by Gary G. Koch, Charles S. Davis, Maura E. Stokes

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4.2. Sets of 2 × r Tables

Consider the data from Koch and Edwards (1988) displayed in Table 4.1. The information comes from a randomized, double-blind clinical trial investigating a new treatment for rheumatoid arthritis. Investigators compared the new treatment with a placebo; the response measured was whether there was no, some, or marked improvement in the symptoms of rheumatoid arthritis.

Table 4.1. Rheumatoid Arthritis Data
  Improvement 
GenderTreatmentNoneSomeMarkedTotal
FemaleTest Drug651627
FemalePlacebo197632
Total 25122259
MaleTest Drug72514
MalePlacebo100111
Total 172625

These data comprise a set of two 2 × 3 tables. There is interest in the association between treatment and degree of improvement, adjusting for gender effects. Degree of ...

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