Categorical Data Analysis Using The SAS® System, 2nd Edition

4.1. Introduction

While sets of 2 × 2 tables are very common, many sets of tables have other dimensions. This chapter focuses on sets of tables that also occur frequently: sets of 2 × r tables in which the column variable is ordinally scaled and sets of s × 2 tables in which the row variable is ordinally scaled. For 2 × r tables, there is interest in investigating a response variable with multiple ordered outcomes for a combined set of strata. For example, you may be comparing a new treatment and a placebo on the extent of patient improvement that is rated as minimal, moderate, or substantial. For s × 2 tables, there is interest in the trend of proportions across ordered groups for a combined set of strata. For example, you may be comparing ...