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

18. maj 2026 opdateret af: Marco D'Addario

A Boost of Health: Effectiveness of a Personalized Communication Intervention Aimed at Increasing Daily Fruit and Vegetable Portions - A Study Within the PNRR 10 ON Foods Partnership

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.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The present study aims to evaluate the effectiveness of a protocol designed to increase fruit and vegetable consumption, grounded in the Health Action Process Approach (HAPA).

The protocol was delivered via the MyPocketHealth app, developed by the research team, and incorporated different communication strategies. Participants were involved in setting a goal and choosing between a personalized or a standardized goal (5 daily portions), which could be reviewed at any time. Moreover, they received either interactive (HAPA-I: group 1) or non-interactive (HAPA-NI: group 2) daily notifications promoting the target behavior through HAPA constructs for 15 days, while also monitoring their daily fruit and vegetable consumption (self-monitoring). A third group engaged solely in self-monitoring without receiving any communication (no-communication group; No comm). Goal attainment was reinforced through badge awards (rewards).

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

403

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • Milano
      • Milan, Milano, Italien, 20126
        • Adorni Roberta

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Individuals from the general population in good health
  • Adequate level of education to understand study procedures and to use a smartphone
  • Ownership and regular use of a smartphone

Exclusion Criteria:

  • Medical conditions that contraindicate an increased consumption of fruit and vegetables
  • Habitual consumption of five (or more) portions of fruit and vegetables per day at baseline

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Interactive condition (HAPA-I: group 1)

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.

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

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.
Participants received a daily reminder to log the portions of fruit and vegetables in a dedicated self-monitoring section of the app.
Eksperimentel: Non-interactive condition (HAPA-NI: group 2)

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.

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

Participants received a daily reminder to log the portions of fruit and vegetables in a dedicated self-monitoring section of the app.
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.
Eksperimentel: Non-communication condition (No-comm: group 3)
Participants did not receive HAPA-based notifications during the trial period. They received a daily reminder to log the portions of fruit and vegetables in a dedicated self-monitoring section of the app.
Participants received a daily reminder to log the portions of fruit and vegetables in a dedicated self-monitoring section of the app.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Daily Fruit and Vegetable Intake from Baseline
Tidsramme: From Day 1 to Day 15 (end of intervention)
Participants self-monitored daily fruit and vegetable intake throughout the study period. Each evening, participants received a reminder and recorded the number of fruit and vegetable portions consumed that day via a dedicated app interface. At the end of the 15-day intervention, the mean daily intake was calculated for each participant. This value was then compared with baseline intake (assessed prior to the start of the intervention) to evaluate whether a statistically significant increase in daily fruit and vegetable consumption was observed.
From Day 1 to Day 15 (end of intervention)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Perceived Well-Being (WHO-5 Index)
Tidsramme: Baseline and Day 15 (end of intervention)
Perceived well-being is assessed using the WHO-5 Well-Being Index, a validated self-report questionnaire that measures subjective psychological well-being. The WHO-5 consists of five items rated on a 6-point Likert scale, with higher scores indicating greater well-being. Scores are collected at baseline and at the end of the 15-day intervention. The outcome is defined as the change in WHO-5 score from baseline to post-intervention.
Baseline and Day 15 (end of intervention)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Marco D'Addario, PhD, University of Milano Bicocca
  • Ledende efterforsker: Maria Elide Vanutelli, PhD, University of Milano Bicocca

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

3. december 2024

Primær færdiggørelse (Faktiske)

16. januar 2026

Studieafslutning (Faktiske)

16. januar 2026

Datoer for studieregistrering

Først indsendt

5. maj 2026

Først indsendt, der opfyldte QC-kriterier

5. maj 2026

Først opslået (Faktiske)

12. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

20. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

18. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • RM-2024-882
  • PE00000003;CUP D93C22000890001 (Andet bevillings-/finansieringsnummer: Italian Ministry of University and Research funded by the European Union - NextGenerationEU)

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