Related Experiment Video
Updated: Jun 11, 2026

'Boden Food Plate': Novel Interactive Web-based Method for the Assessment of Dietary Intake
Published on: September 18, 2018
Long-term fruit and vegetable change in worksites: Seattle 5 a Day follow-up
Shirley A A Beresford1, Beti Thompson, Sonia Bishop
1Department of Epidemiology, University of Washington, Seattle, WA 98195-7236, USA. beresfrd@u.washington.edu
Objective:
To evaluate long-term change in fruit and vegetable intake following a group randomized trial of worksites.
Methods:
Medium-sized blue-collar businesses in the Seattle metropolitan area were recruited. Intake was assessed using serial cross-sectional samples of current workforce at 3 time points. The multilevel 18-month intervention involved partnership with the companies. Long-term follow-up was at 4.4 years postbaseline. Statistical analysis used general linear models, adjusting for worksite random effects.
Results:
Initially, 45 worksites were randomized, with 29 agreeing to participate in a new study. Fruits and vegetable intake increased, with larger sustained changes in the intervention worksites, resulting in a long-term differential change of 0.25 servings per day, 95% confidence interval (0.09 to 0.40).
Conclusions:
Intervention sustained small effects at 4 years, including 2 years with no contact. Although effects were not large, this low-intensity intervention approach could provide an important public health model.
Related Concept Videos
Cancer Prevention
Some...
Cancer Prevention
Some...
Lifestyle Factors and Health
Benefits of Physical Activity
Physical activity, whether through structured exercise or casual activities like walking, biking, or dancing, is a cornerstone of a...
Dietary Connections
Fruit Development, Structure, and Function
Levels of Health Promotion and Illness Prevention
In primary prevention, actions taken before disease onset prevent the disease from...
