A random mailed survey (response N = 226; 75.3%) of participants in diet-related home-based learning evaluated exposure to recruitment channels and impact on salience, utility, level of participation, sharing the course with others, knowledge, and performing recommended behaviors. A post-only design, the study was conducted in a small Minnesota city (population = 20,000), part of the Cancer and Diet Intervention (CANDI) project.
About 18.5% of residents (3,711) enrolled during an 8-week media campaign; women, college graduates, and those over 44 years old were overrepresented. Participants learned about the program through mass media (97%); small media (41.9%); and interpersonal sources (50%). Women were more likely to learn about the course through interpersonal
sources. In analysis of variance (ANOVA) modeling, salience and utility predicted level of participation in course activities. Level of participation in turn predicted nutrition knowledge and with salience predicted performance of recommended behaviors. Although the course appealed to individuals who needed it less, there was evidence of diffusion to the unenrolled. About 57% of responding participants reported sharing it with spouses; about 67% reported sharing it with someone outside their households.
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