Livsmedelsbyten för att förbättra hälsotillståndet och miljömässig hållbarhet av livsmedelsinköp
29 maj 2026 uppdaterad av: Anna Grummon, Stanford University
En slumpmässig prövning av matbyten för att förbättra hälsovården och miljömässigt hållbarhet för dagligvaruinköp
Studien syftar till att avgöra om att ta emot rekommendationer för hälsosammare eller mer miljömässigt hållbara byten (eller både och) i en online-livsmedelsbutiksmiljö förbättrar hälsan och miljömässig hållbarhet för konsumenternas mat- och dryckesköp jämfört med att handla som vanligt utan bytesrekommendationer.
Webbutiken kommer att registrera deltagarnas val.
Deltagarna kommer också att uppmanas att genomföra enkätåtgärder.
Studieöversikt
Status
Avslutad
Betingelser
Intervention / Behandling
Detaljerad beskrivning
Deltagarna kommer att slutföra ett online randomiserat experiment mellan ämnen. Experimentet kommer att omfatta tre studiebesök.
I det första studiebesöket kommer deltagarna att slutföra en shoppinguppgift i en matbutik online utan ingripande. Deltagarna kommer att få en budget på $50 och ombeds att handla som de normalt skulle göra. Butiken kommer att spela in deltagarnas val. Efter att ha slutfört shoppinguppgiften kommer deltagarna att fylla i en onlineenkät.
Ungefär en vecka senare kommer deltagarna att genomföra ett andra studiebesök med samma instruktioner. De kommer att randomiseras till 1 av 4 tillstånd (1) endast hälsa, 2) endast miljö, 3) kombinerad hälsa och miljö, 4) kontroll. I det endast hälsotillstånd kommer deltagarna att se etiketter med hälsobetyg och kan bli hänvisade till att byta ut sina val mot hälsosammare föremål. I miljömässigt tillstånd kommer deltagarna att se etiketter med klimatpåverkansklasser och kan bli hänvisade till att byta ut sina val mot mer hållbara föremål. I hälso- och miljötillståndet kommer deltagarna att se etiketter med hälso- och klimatpåverkansklasser och kan bli hänvisade till att byta ut sina val mot hälsosammare eller mer hållbara produkter. I kontrollgruppen kommer deltagarna inte att se några etiketter eller byten. Butiken kommer att spela in deltagarnas val. Efter att ha slutfört shoppinguppgiften kommer deltagarna att fylla i en onlineenkät.
I det tredje studiebesöket kommer deltagarna att behålla sin tilldelade grupp och kommer att bli ombedda att upprepa samma uppgifter som vid det andra besöket.
Studietyp
Interventionell
Inskrivning (Faktisk)
1201
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studieorter
-
-
California
-
Palo Alto, California, Förenta staterna, 94304
- Stanford School of Medicine
-
-
Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
- Äldre vuxen
Tar emot friska volontärer
Ja
Beskrivning
Inklusionskriterier:
- 18 år eller äldre
- Bor i USA
- Kan läsa och tala engelska
- Ha tillgång till internet för att slutföra de 3 studiebesöken online
Uteslutningskriterier:
- Under 18 år
- Bor utanför USA
- Det gick inte att fylla i en enkät på engelska
- Har inte tillgång till internet för att genomföra de 3 studiebesöken online
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Förebyggande
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Aktiv komparator: Kontrollera
Inga etiketter eller byten.
|
Deltagarna kommer inte att se några extra etiketter eller erbjudas några byten i onlinebutiken.
|
|
Experimentell: Hälsoutbyten
Etiketter kommer att vara "näringsgrader" för produkter och utbytesbyteförslag kommer att vara för artiklar med en bättre näringsgrad.
|
Deltagarna kommer att se "hälsoklass"-etiketter på alla produkter i online-livsmedelsbutiken som indikerar deras hälsa enligt uppskattning av United Kingdom Ofcom Nutrient Profiling Model-poäng.
Hälsopoängetiketterna kommer att efterlikna Nutri-Score-etiketter, ett märkningssystem som används i vissa europeiska länder, som visar en färgkodad grad av "A" (grön) till "F" (röd) på varje produkt.
Produkter med "A" och "B" etiketter kommer att uppfylla Storbritanniens cutoff för produkter som kan marknadsföras till barn och "C", "D" och "F" produkter är mindre hälsosamma än denna cutoff (baserat på tertiler av Ofcom poäng inom varje livsmedelsgrupp).
När deltagarna försöker lägga till en mindre hälsosam produkt i sin kundvagn (t.ex. "C", "D" eller "F" hälsomärkning), kommer butiken automatiskt att föreslå en hälsosammare produkt från samma kategori (t.ex. med ett "A" eller "B" hälsomärkning).
|
|
Experimentell: Klimatbyten
Etiketter kommer att vara "klimatkvaliteter" för produkter och utbytesbyteförslag kommer att vara för artiklar med bättre klimatklass.
|
Deltagarna kommer att se "klimatkvalitet" -etiketter på alla produkter som indikerar deras klimatpåverkan.
Klimatpåverkan beräknas som växthusgasutsläpp som är förknippade med att producera produkten i koldioxidekvivalenter (CO2-EQ) per 100 g (dvs "kolavtryck").
Etiketter kommer att tillämpas baserat på kvintiler av kolavtryck i varje livsmedelsgrupp.
När deltagarna försöker lägga till en produkt med hög klimatpåverkan i sin vagn (t.ex. med en "C", "D" eller "F" klimatetikett) kommer butiken automatiskt att bytas till mer klimatvänliga produkter (t.ex. med en "A" eller "B" -klimatetikett).
|
|
Experimentell: Kombinerade hälso- och klimatbyten
Etiketter kommer att vara "näringsgrader" och "klimatkvaliteter" för produkter och utbytesbyteförslag kommer att vara för föremål som är bättre än ursprungligen utvalda produkter på minst en dimension (näringsgrad eller klimatkvalitet) och inte värre än ursprungligen utvalda produkter på endera dimensionen.
|
Deltagarna kommer att se både hälso- och klimatetiketter på alla produkter i online -livsmedelsbutiken.
When participants attempt to select a product with a "C," "D," or "F" label on either dimension to their cart, the store will automatically offer them swaps to products that offer improvement over the original food on at least 1 dimension (health or climate-friendliness) and were at least as good or better on the other dimension, with the additional guardrail that the store never suggests products with a "C," "D" or "F" label on either dimension.
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Healthfulness of Product Selection
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Carbon Footprint of Participants' Grocery Store Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Calorie Density of Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Sugar Density of Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Sodium Density of Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Saturated Fat Density of Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Fiber Density of Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Protein Density of Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Total Spending on Participants' Grocery Selections
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Thinking About Health
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Thinking About Climate Impact
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Thinking About Taste
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Negative Emotional Reactions While Shopping
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Positive Emotional Reactions While Shopping
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Injunctive Norms to Buy Healthy Foods
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Descriptive Norms to Buy Healthy Foods
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Injunctive Norms to Buy Foods With Low Climate Impact
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
|
Descriptive Norms to Buy Foods With Low Climate Impact
Tidsram: 1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
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.
|
1-week follow-up (visit 2), and 2-week follow-up (visit 3)
|
Andra resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Perceived Helpfulness of Nutrition Labels
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Perceived Helpfulness of Climate Labels
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Perceived Helpfulness of Health Swap Recommendations
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Perceived Helpfulness of Climate Swap Recommendations
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Liking of Nutrition Labels
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Liking of Climate Labels
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Liking of Health Swap Recommendations
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Liking of Climate Swap Recommendations
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Acceptability of Nutrition Labels
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Acceptability of Climate Labels
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Acceptability of Health Swap Recommendations
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
|
Acceptability of Climate Swap Recommendations
Tidsram: Assessed at 2-week follow-up (visit 3)
|
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).
|
Assessed at 2-week follow-up (visit 3)
|
Samarbetspartners och utredare
Det är här du hittar personer och organisationer som är involverade i denna studie.
Sponsor
Samarbetspartners
Utredare
- Huvudutredare: Anna H. Grummon, PhD, Stanford School of Medicine
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart (Faktisk)
7 maj 2025
Primärt slutförande (Faktisk)
25 juni 2025
Avslutad studie (Faktisk)
25 juni 2025
Studieregistreringsdatum
Först inskickad
16 oktober 2024
Först inskickad som uppfyllde QC-kriterierna
16 oktober 2024
Första postat (Faktisk)
18 oktober 2024
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
24 juni 2026
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
29 maj 2026
Senast verifierad
1 maj 2026
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- 76925
- K01HL158608 (U.S.S. NIH-anslag/kontrakt)
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
JA
IPD-planbeskrivning
Vi kommer att lägga upp data till ett offentligt arkiv.
Tidsram för IPD-delning
Den analytiska koden kommer att publiceras i ett offentligt arkiv vid publicering av studieresultat.
Kriterier för IPD Sharing Access
Allmänt tillgänglig utan begränsningar.
IPD-delning som stöder informationstyp
- ANALYTIC_CODE
Läkemedels- och apparatinformation, studiedokument
Studerar en amerikansk FDA-reglerad läkemedelsprodukt
Nej
Studerar en amerikansk FDA-reglerad produktprodukt
Nej
produkt tillverkad i och exporterad från U.S.A.
Nej
Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .