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Recruiting Worksites to Participate in a Health Promotion Research Study

Purpose. In this study, the type and size of participating and nonparticipating worksites in a health promotion research trial were examined. Design. In-person and telephone contacts were made with representatives from a random sample of eligible worksites recruited to participate in a research trial to increase fruit and vegetable consumption. Setting. Worksites that had 250 to 2000 employees and a worksite cafeteria were recruited. Subjects. Eighty-one worksites were contacted. Measures. A census of eligible worksites (N = 109) formed the recruitment base, and a random selection of worksites (N = 81) was personally contacted and asked to participate in the research. Information on size, type of worksite, and a worksite representative was obtained from a privately compiled list covering the greater Puget Sound area. Eligibility for the project included the presence of an onsite cafeteria at the worksite as assessed by a brief telephone call. Results. Thirty-six of the contacted worksites (44.5%) agreed to participate. There were no significant differences in participation by type or size of worksite. Discussion. Worksites can be recruited to participate in research trials. No particular type or size of worksite is more likely to participate. Instituting pre-randomization participation conditions may reduce post-randomization dropout by ascertaining compliance with research requirements before randomization.