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Updated: Nov 3, 2025
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Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes
Published on: June 28, 2024
561
Promoting Fruit and Vegetable Intake in Parents: A Cluster Randomised Controlled Trial
Yuying Sun1, Samantha S W Fung1,2, Patrick K W Man3
1School of Public Health, The University of Hong Kong, Hong Kong, China.
Summary
A brief, 2-hour workshop effectively increased fruit and vegetable (FV) intake in parents. This Health Action Process Approach (HAPA)-based intervention showed significant improvements in FV consumption and related behaviors.
Area of Science:
- Public Health
- Behavioral Science
- Nutrition Education
Background:
- Low fruit and vegetable (FV) intake is a significant public health concern.
- Parental behavior significantly influences children's dietary habits.
- Existing interventions often lack evidence of effectiveness or long-term impact.
Purpose of the Study:
- To evaluate the effectiveness of a single-session, 2-hour workshop on promoting fruit and vegetable (FV) intake among parents.
- To assess the impact of the workshop on behavioral determinants of FV consumption using the Health Action Process Approach (HAPA).
- To determine if a brief, HAPA-based intervention can lead to sustained improvements in FV intake.
Main Methods:
- A cluster randomised controlled trial involving 803 parents across 56 primary schools and community centers.
- Intervention group received a 2-hour workshop focused on increasing FV consumption and food literacy.
- Control group received a workshop on increasing appreciation or reducing criticism; FV intake and HAPA determinants were measured at baseline, 2, and 6 weeks.
Main Results:
- The FV intervention group demonstrated a significantly greater increase in FV consumption compared to the control group (large effect sizes, d: 0.97-1.08).
- Improvements were observed in key behavioral determinants, including outcome expectancies, self-efficacy, intention, and planning behavior (small effect sizes, d: 0.19-0.43).
- These positive effects were consistent across all measured time points (2-weeks and 6-weeks post-intervention).
Conclusions:
- A brief, single-session, Health Action Process Approach (HAPA)-based workshop is effective in promoting fruit and vegetable (FV) intake in parents.
- The intervention positively influenced parental behavioral determinants related to FV consumption.
- This study provides the first population-based randomized controlled trial evidence for the efficacy of such a brief intervention.
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