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A Boost of Health: Effectiveness of a Personalized Communication Intervention to Increase Daily Fruit and Vegetable Intake

NCT07581847 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 403

Last updated 2026-05-20

No results posted yet for this study

Summary

This study aims to evaluate the efficacy of a healthy diet promotion intervention focused on increasing fruit and vegetable consumption. The intervention is delivered via mobile application in a sample drawn from the healthy adult population.

Conditions

  • Interactive Condition (HAPA-I: Group 1)
  • Non-interactive Condition (HAPA-NI: Group 2)
  • Non-communication Condition (No Comm: Group 3)

Interventions

BEHAVIORAL

Interactive communication

Participants received two daily notifications. Each notification included a question about a variable from the HAPA model, and participants responded on a 5-point Likert scale. Those who scored low (1-3) received a motivational message tailored to their response. In contrast, participants who scored high (4-5) received rewarding messages. These notifications gave participants feedback on their standings within the HAPA.

BEHAVIORAL

Non-interactive Communication

Participants received two daily educational notifications about HAPA variables, but they did not interact with the app. The notifications for both the HAPA-I and HAPA-NI groups were identical in structure, word count, and graphic format. The only difference was the level of content customization: it was generic for the HAPA-NI group and tailored to participants' responses for the HAPA-I group.

BEHAVIORAL

Self-monitoring

Participants received a daily reminder to log the portions of fruit and vegetables in a dedicated self-monitoring section of the app.

Sponsors & Collaborators

  • Marco D'Addario

    lead OTHER

Principal Investigators

  • Marco D'Addario, PhD · University of Milano Bicocca

  • Maria Elide Vanutelli, PhD · University of Milano Bicocca

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
55 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-12-03
Primary Completion
2026-01-16
Completion
2026-01-16

Countries

  • Italy

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07581847 on ClinicalTrials.gov