Matbytte for å forbedre helsen og miljømessig bærekraft ved dagligvarekjøp
29. mai 2026 oppdatert av: Anna Grummon, Stanford University
En randomisert utprøving av matbytter for å forbedre helsen og miljømessig bærekraft ved dagligvarekjøp
Studien tar sikte på å finne ut om det å motta anbefalinger for sunnere eller mer miljømessig bærekraftige bytter (eller begge deler) i et nettbutikkmiljø forbedrer helsen og miljømessig bærekraft for forbrukernes mat- og drikkekjøp sammenlignet med å handle som vanlig uten bytteanbefalinger.
Nettbutikken vil registrere deltakernes valg.
Deltakerne vil også bli bedt om å gjennomføre undersøkelsestiltak.
Studieoversikt
Status
Fullført
Detaljert beskrivelse
Deltakerne vil fullføre et online randomisert eksperiment mellom fag. Forsøket vil innebære tre studiebesøk.
I det første studiebesøket vil deltakerne fullføre en handleoppgave på nettbutikken uten innblanding. Deltakerne vil få et budsjett på $50 og bedt om å handle som de normalt ville gjort. Butikken vil registrere deltakernes valg. Etter å ha fullført handleoppgaven, vil deltakerne fullføre en nettbasert spørreundersøkelse.
Omtrent en uke senere vil deltakerne gjennomføre et andre studiebesøk med de samme instruksjonene. De vil bli randomisert til 1 av 4 tilstander (1) kun helse, 2) kun miljø, 3) kombinert helse og miljø, 4) kontroll. I tilstanden kun for helse vil deltakerne se etiketter med helsekarakterer og kan bli bedt om å bytte ut valgene sine med sunnere varer. I den eneste miljøtilstanden vil deltakerne se etiketter med klimapåvirkningskarakterer og kan bli bedt om å bytte ut valgene sine med mer bærekraftige varer. I helse- og miljøtilstanden vil deltakerne se etiketter med helse- og klimapåvirkningskarakterer og kan bli bedt om å bytte ut valgene sine med sunnere eller mer bærekraftige varer. I kontrollgruppen vil ikke deltakerne se noen etiketter eller bytte. Butikken vil registrere deltakernes valg. Etter å ha fullført handleoppgaven, vil deltakerne fullføre en nettbasert spørreundersøkelse.
I det tredje studiebesøket vil deltakerne opprettholde sin tildelte gruppe og vil bli bedt om å gjenta de samme oppgavene som i det andre besøket.
Studietype
Intervensjonell
Registrering (Faktiske)
1201
Fase
- Ikke aktuelt
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
-
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California
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Palo Alto, California, Forente stater, 94304
- Stanford School of Medicine
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Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
- Eldre voksen
Tar imot friske frivillige
Ja
Beskrivelse
Inkluderingskriterier:
- 18 år eller eldre
- Bosatt i USA
- Kan lese og snakke engelsk
- Ha internettilgang for å fullføre de 3 nettbaserte studiebesøkene
Ekskluderingskriterier:
- Under 18 år
- Bosatt utenfor USA
- Kan ikke fullføre en spørreundersøkelse på engelsk
- Ikke ha internettilgang for å gjennomføre de 3 nettbaserte studiebesøkene
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Forebygging
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
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Aktiv komparator: Kontroll
Ingen etiketter eller bytte.
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Deltakere vil ikke se noen ekstra etiketter eller bli tilbudt noen bytte i nettbutikken.
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Eksperimentell: Helsebytter
Etiketter vil være "ernæringskarakterer" for produkter og forslag til bytte av erstatning vil være for varer med en bedre ernæringsgrad.
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Deltakerne vil se "helsekarakter"-etiketter på alle produktene i den elektroniske dagligvarebutikken som indikerer deres sunnhet som anslått av United Kingdom Ofcom Nutrient Profiling Model-score.
Etikettene for helsepoeng vil etterligne Nutri-Score-etiketter, et merkesystem som brukes i enkelte europeiske land, som viser en fargekodet karakter fra "A" (grønn) til "F" (rød) på hvert produkt.
Produkter med "A" og "B"-etiketter vil oppfylle Storbritannias grenseverdi for produkter som kan markedsføres til barn, og "C", "D" og "F"-etiketter er mindre sunne enn denne grensen (basert på tertiler av Ofcom) score innenfor hver matvaregruppe).
Når deltakerne prøver å legge til et mindre sunt produkt i handlekurven (f.eks. "C", "D" eller "F" helsemerke), vil butikken automatisk foreslå et sunnere produkt fra samme kategori (f.eks. med en "A" eller "B" helsemerke).
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Eksperimentell: Klimabytter
Etiketter vil være "klimakarakterer" for produkter og forslag om bytte av erstatning vil være for gjenstander med bedre klimakvalitet.
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Deltakerne vil se "klimakvalitets" etiketter på alle produkter som indikerer deres klimakonsekvens.
Klimaffekten beregnes som klimagassutslipp assosiert med å produsere produktet i karbondioksidekvivalenter (CO2-EQ) per 100 g (dvs. "karbonfotavtrykk").
Etiketter vil bli brukt basert på kvintiler av karbonavtrykk i hver matvaregruppe.
Når deltakerne prøver å legge til et produkt med høyt klima-påvirkning i handlekurven (f.eks. Med en "C", "D" eller "F" -klimamerke), vil butikken automatisk tilby dem bytter til mer klimarvennlige produkter (f.eks. Med et "A" eller "B" klimaselskap).
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Eksperimentell: Kombinert helse- og klimabytter
Etiketter vil være "ernæringskarakterer" og "klimakarakterer" for produkter og erstatningsbytteforslag vil være for elementer som er bedre enn opprinnelig utvalgte produkter på minst en dimensjon (ernæringsgrad eller klimakvalitet) og ikke verre enn opprinnelig utvalgte produkter på begge dimensjoner.
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Deltakerne vil se både helse- og klimakvalitetsetikettene på alle produkter i den elektroniske dagligvarebutikken.
Når deltakerne prøver å velge et produkt med en "C," "D," eller "F"-etikett på begge dimensjoner til handlekurven, vil butikken automatisk tilby dem bytter til produkter som gir forbedring i forhold til den opprinnelige maten på minst 1 dimensjon (helse eller klima-vennlighet) og i det minste var en så god eller bedre på den andre dimensjonen, med den ekstra beskyttelsen "som aldri foreslo.
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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Healthfulness of Product Selection
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will asses healthfulness of participants' selections as the average Ofcom Nutrient Profiling Model score of the products the participants select in the shopping task.
The score ranges from 0 to 100, where higher scores are healthier.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Carbon Footprint of Participants' Grocery Store Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the carbon footprint of participants' selections, operationalized as the average carbon footprint (in CO2-equivalents) of the products the participants select in the shopping task.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, the non-missing value was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Calorie Density of Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the average calorie density of participants' grocery selections, calculated as the average kcal per 100g of the selected products.
Higher values will indicate higher calorie density.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Sugar Density of Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the average sugar density of participants' grocery selections, calculated as the average grams of sugar per 100g of the selected products.
Higher values will indicate higher sugar density.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Sodium Density of Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the average sodium density of participants' grocery selections, calculated as the average milligrams of sodium per 100g of the selected products.
Higher values will indicate higher sodium density.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Saturated Fat Density of Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the average saturated fat density of participants' grocery selections, calculated as the average grams of saturated fat per 100g of the selected products.
Higher values will indicate higher saturated fat density.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Fiber Density of Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the average fiber density of participants' grocery selections, calculated as the average grams of fiber per 100g of the selected products.
Higher values will indicate higher fiber density.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Protein Density of Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the average protein density of participants' grocery selections, calculated as the average grams of protein per 100g of the selected products.
Higher values will indicate higher protein density.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Total Spending on Participants' Grocery Selections
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess the total amount participants spent on their grocery selections in United States dollars.
Higher values will indicate greater spending.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Thinking About Health
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess thinking about health using 1 item: "We are interested in how you selected products while you were grocery shopping.
When you selected foods, how much did you think about each of the following characteristics?
... health."
Response options range from "Not at all" (1) to "A great deal" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Thinking About Climate Impact
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess thinking about climate impact using 1 item: "We are interested in how you selected products while you were grocery shopping.
When you selected foods, how much did you think about each of the following characteristics?
... climate impact."
Response options range from "Not at all" (1) to "A great deal" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Thinking About Taste
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess thinking about taste using 1 item: "We are interested in how you selected products while you were grocery shopping.
When you selected foods, how much did you think about each of the following characteristics?
... taste."
Response options range from "Not at all" (1) to "A great deal" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Negative Emotional Reactions While Shopping
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess negative emotional reactions using 3 items: "While you were shopping, how much did you feel…" "worried", "guilty," "ashamed"?
Response options range from "Not at all" (1) to "Extremely" (5).
The investigators will average the 3 items; higher average scores indicate stronger negative emotional reactions.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Positive Emotional Reactions While Shopping
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess positive emotional reactions using 3 items: "While you were shopping, how much did you feel…" "inspired", "proud," "reassured"?
Response options range from "Not at all" (1) to "Extremely" (5).
The investigators will average the 3 items; higher average scores indicate stronger positive emotional reactions.
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Injunctive Norms to Buy Healthy Foods
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess injunctive norms to buy healthy foods with 1 item: "People who are important to me think I should buy healthy foods."
Response options range from "Strongly disagree" (1) to "Strongly agree" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Descriptive Norms to Buy Healthy Foods
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess descriptive norms to buy healthy foods with 1 item: "Most shoppers buy healthy foods when they are shopping for groceries."
Response options range from "Strongly disagree" (1) to "Strongly agree" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Injunctive Norms to Buy Foods With Low Climate Impact
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess injunctive norms to buy foods with low climate impact with 1 item: "People who are important to me think I should buy foods with low climate impact."
Response options range from "Strongly disagree" (1) to "Strongly agree" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Descriptive Norms to Buy Foods With Low Climate Impact
Tidsramme: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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The study will assess descriptive norms to buy foods with lower climate impact with 1 item: "Most shoppers buy foods with low climate impact when they are shopping for groceries."
Response options range from "Strongly disagree" (1) to "Strongly agree" (5).
Outcome values were calculated as each participant's mean across visits 2 and 3.
If participants had missing data at one of these visits, data from the non-missing visit was used.
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1-week follow-up (visit 2), and 2-week follow-up (visit 3)
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Andre resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Perceived Helpfulness of Nutrition Labels
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess perceived helpfulness of nutrition labels with 1 item: "These labels would help me choose healthier foods."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Perceived Helpfulness of Climate Labels
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess perceived helpfulness of climate labels with 1 item: "These labels would help me choose foods with lower climate impact."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Perceived Helpfulness of Health Swap Recommendations
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess perceived helpfulness of health swap recommendations with 1 item: "This type of recommendation would help me choose healthier foods."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Perceived Helpfulness of Climate Swap Recommendations
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess perceived helpfulness of climate swap recommendations with 1 item: "This type of recommendation would help me choose more foods with lower climate impact."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Liking of Nutrition Labels
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess liking of nutrition labels with 1 item: "I like these labels."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Liking of Climate Labels
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess liking of climate labels with 1 item: "I like these labels."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Liking of Health Swap Recommendations
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess liking health swap recommendations with 1 item: "I like these recommendations."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Liking of Climate Swap Recommendations
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess liking climate swap recommendations with 1 item: "I like these recommendations."
Response options range from "Not at all" (1) to "A great deal" (5).
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Assessed at 2-week follow-up (visit 3)
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Acceptability of Nutrition Labels
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess acceptability of the nutrition labels with 1 item: "How much would you approve or disapprove of these labels being displayed on foods sold in grocery stores?"
Response options range from "Strongly disapprove" (1) to "Strongly approve" (5).
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Assessed at 2-week follow-up (visit 3)
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Acceptability of Climate Labels
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess acceptability of the climate labels with 1 item: "How much would you approve or disapprove of these labels being displayed on foods sold in grocery stores?"
Response options range from "Strongly disapprove" (1) to "Strongly approve" (5).
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Assessed at 2-week follow-up (visit 3)
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Acceptability of Health Swap Recommendations
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess acceptability of the health swap recommendations with 1 item: "How much would you approve or disapprove of these recommendations being offered by grocery stores?"
Response options range from "Strongly disapprove" (1) to "Strongly approve" (5).
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Assessed at 2-week follow-up (visit 3)
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Acceptability of Climate Swap Recommendations
Tidsramme: Assessed at 2-week follow-up (visit 3)
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The study will assess acceptability of the climate swap recommendations 1 item: "How much would you approve or disapprove of these recommendations being offered by grocery stores?"
Response options range from "Strongly disapprove" (1) to "Strongly approve" (5).
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Assessed at 2-week follow-up (visit 3)
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Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Sponsor
Samarbeidspartnere
Etterforskere
- Hovedetterforsker: Anna H. Grummon, PhD, Stanford School of Medicine
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Faktiske)
7. mai 2025
Primær fullføring (Faktiske)
25. juni 2025
Studiet fullført (Faktiske)
25. juni 2025
Datoer for studieregistrering
Først innsendt
16. oktober 2024
Først innsendt som oppfylte QC-kriteriene
16. oktober 2024
Først lagt ut (Faktiske)
18. oktober 2024
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
24. juni 2026
Siste oppdatering sendt inn som oppfylte QC-kriteriene
29. mai 2026
Sist bekreftet
1. mai 2026
Mer informasjon
Begreper knyttet til denne studien
Nøkkelord
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 76925
- K01HL158608 (U.S. NIH-stipend/kontrakt)
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
JA
IPD-planbeskrivelse
Vi vil legge ut dataene til et offentlig depot.
IPD-delingstidsramme
Den analytiske koden vil bli lagt ut i et offentlig depot ved publisering av studiefunn.
Tilgangskriterier for IPD-deling
Offentlig tilgjengelig uten begrensninger.
IPD-deling Støtteinformasjonstype
- ANALYTIC_CODE
Legemiddel- og utstyrsinformasjon, studiedokumenter
Studerer et amerikansk FDA-regulert medikamentprodukt
Nei
Studerer et amerikansk FDA-regulert enhetsprodukt
Nei
produkt produsert i og eksportert fra USA
Nei
Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .