Increasing fruit and vegetable consumption among callers to the CIS: Results from a randomized trial

A. C. Marcus, J. Heimendinger, P. Wolfe, B. K. Rimer, M. Morra, D. Cox, P. J. Lang, W. Stengle, M. P. Van Herle, D. Wagner, D. Fairclough, L. Hamilton

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


Background. Results are reported from a large randomized trial designed to increase fruit and vegetable consumption among callers to the Cancer Information Service (CIS). Methods. CIS callers assigned to the intervention group received a brief proactive educational intervention over the telephone at the end of usual service, with two follow-up mailouts. Key educational messages and print material derived from the NCI 5 A Day for Better Health program were provided to intervention subjects. Subjects were interviewed by telephone at both 4-week (n = 1,672) and 4-month (n = 1,286) follow-up. Results. A single-item measure of fruit and vegetable consumption revealed a significant intervention effect of approximately 0.65 servings per day at 4- week follow-up (P < 0.001) and 0.41 servings per day at 4-month follow-up (P < 0.001). Using a seven-item food frequency measure that was also included in the 4-month interviews, a similar intervention effect of 0.34 servings per day was obtained (P = 0.006). The vast majority of CIS callers (88%) endorsed the strategy of providing 5 A Day information proactively. Conclusions. A brief educational intervention delivered to CIS callers at the end of usual service was associated with an increase in self-reported fruit and vegetable intake.

Original languageEnglish (US)
Pages (from-to)S16-S28
JournalPreventive Medicine
Issue number5 II
StatePublished - 1998


  • Cancer/prevention and control
  • Diet
  • Health education
  • Telephone information services

ASJC Scopus subject areas

  • Epidemiology
  • Public Health, Environmental and Occupational Health


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