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Randomized Controlled Trial
. 2008 Apr-May;13(3):230-49.
doi: 10.1080/10810730801985285.

Randomized trial on the 5 a day, the Rio Grande Way Website, a web-based program to improve fruit and vegetable consumption in rural communities

David B Buller  1 , W Gill Woodall, Donald E Zimmerman, Michael D Slater, Jerianne Heimendinger, Emily Waters, Joan M Hines, Randall Starling, Barbara Hau, Patricia Burris-Woodall, Glenna Sue Davis, Laura Saba, Gary R Cutter
Affiliations
Randomized Controlled Trial

Randomized trial on the 5 a day, the Rio Grande Way Website, a web-based program to improve fruit and vegetable consumption in rural communities

David B Buller et al. J Health Commun. 2008 Apr-May.

Abstract

The Internet is a new technology for health communication in communities. The 5 a Day, the Rio Grande Way website intended to increase fruits and vegetables (FV) consumption was evaluated in a rural region enrolling 755 adults (65% Hispanic, 9% Native American, 88% female) in a randomized pretest-posttest controlled trial in 2002-2004. A total of 473 (63%) adults completed a 4-month follow-up. The change in daily intake on a food frequency questionnaire (control: mean = - 0.26 servings; intervention: mean = 0.38; estimated difference = 0.64, SD = 0.52, t(df = 416) = 1.22, p = 0.223) and single item (13.9% eating 5 + servings at pretest, 19.8% posttest for intervention; 17.4%, 13.8% for controls; odds ratio (OR) = 1.84, 95% CI = 1.07, 3.17) was in the expected direction but significant only for the single item. Website use was low and variable (logins: M = 3.3, range = 1 to 39.0; total time: M = 22.2 minutes, range = 0 to 322.7), but it was associated positively with fruit and vegetable intake (total time: Spearman r = 0.14, p = 0.004 for food frequency; Spearman r = 0.135, p = 0.004 for single item). A nutrition website may improve FV intake. The comparison on the food frequency measure may have been undermined by its high variability. Websites may be successful in community settings only when they are used enough by adults to influence them.

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Participant flow in randomized trial.
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