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A Randomized Trial of Tailoring and Motivational Interviewing to Promote Fruit and Vegetable Consumption for Cancer Prevention and Control

  • Original Article
  • Published:
Annals of Behavioral Medicine

Abstract

Background

Healthful dietary patterns, including eating fruits and vegetables (F&V) and avoiding obesity, may decrease the risk of cancer and other chronic diseases. In addition to promoting health for the general population, a cancer diagnosis may provide a “teachable moment,” facilitating the adoption of more healthful eating habits and leading to lower risk of chronic disease and better overall health.

Purpose

This study was designed to test the effectiveness of two health communication interventions in increasing F&V consumption and physical activity in a sample of older adults (average age of 66 years), including both colorectal cancer (CRC) survivors and noncolorectal cancer-affected (N-CRC) individuals.

Methods

CRC survivors and N-CRC individuals were recruited from a population-based case–control study and randomly assigned to four conditions using a 2 × 2 design. We tested two different methods of communicating and promoting health behavior change alone or in combination: tailored print communication (TPC) and brief telephone-based motivational interviewing (TMI).

Results

A significant increase in F&V consumption was found for the combined intervention group in the entire sample (p < 0.05). When stratified by cancer survivor status, the effect was concentrated in the N-CRC subset (p < 0.01) versus CRC survivors. The combined intervention was also found to be most cost-effective for the N-CRC group, with TPC more cost-effective than TMI. For physical activity, none of the interventions produced statistically significant improvements.

Conclusions

This study indicates that combining tailoring and motivational interviewing may be an effective and cost-effective method for promoting dietary behavior change among older healthy adults. More research is needed to identify the optimal dose and timing for intervention strategies to promote dietary and physical activity change among both CRC survivors and the general population.

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Acknowledgments

This project was supported by a grant from the National Cancer Institute (RO1-CA81914) and by additional grants from the National Institutes of Health (DK034987, RO1-CA66635, and DK056350).

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Correspondence to Marci Kramish Campbell Ph.D..

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Campbell, M.K., Carr, C., DeVellis, B. et al. A Randomized Trial of Tailoring and Motivational Interviewing to Promote Fruit and Vegetable Consumption for Cancer Prevention and Control. ann. behav. med. 38, 71–85 (2009). https://doi.org/10.1007/s12160-009-9140-5

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  • DOI: https://doi.org/10.1007/s12160-009-9140-5

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