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

4.3. Sets of s × 2 Tables

The following data come from a study on adolescent usage of smokeless tobacco (Bauman, Koch, and Lentz 1989). Interest focused on factors that affected usage, such as perception of risk, father’s usage of smokeless tobacco, and educational background. Table 4.5 contains two s × 2 tables of risk perception (minimal, moderate, and substantial) and adolescent usage by father’s usage. This time, the row variable is ordinally scaled. The question of interest is whether there is a discernible trend in the proportions of adolescent usage over the levels of risk perception. Does usage decline with higher risk perception?

Table 4.5. Adolescent Smokeless Tobacco Usage

Father’s Usage	Risk Perception	Adolescent Usage
		No	Yes	Total
No ...