Intercambios de alimentos para mejorar la salud y la sostenibilidad ambiental de las compras de alimentos
29 de mayo de 2026 actualizado por: Anna Grummon, Stanford University
Una prueba aleatoria de intercambios de alimentos para mejorar la salud y la sostenibilidad ambiental de las compras de comestibles
El estudio tiene como objetivo determinar si recibir recomendaciones para intercambios más saludables o ambientalmente más sostenibles (o ambos) en un entorno de tienda de comestibles en línea mejora la salud y la sostenibilidad ambiental de las compras de alimentos y bebidas de los consumidores en comparación con comprar como de costumbre sin recomendaciones de intercambio.
La tienda online registrará las selecciones de los participantes.
También se pedirá a los participantes que completen las medidas de la encuesta.
Descripción general del estudio
Estado
Terminado
Condiciones
Descripción detallada
Los participantes completarán un experimento aleatorio en línea entre sujetos. El experimento incluirá tres visitas de estudio.
En la primera visita del estudio, los participantes completarán una tarea de compra en línea en una tienda de comestibles sin intervención. Los participantes recibirán un presupuesto de 50 dólares y se les pedirá que compren como lo harían normalmente. La tienda registrará las selecciones de los participantes. Después de completar la tarea de compra, los participantes completarán una encuesta en línea.
Aproximadamente una semana después, los participantes completarán una segunda visita del estudio con las mismas instrucciones. Serán asignados al azar a 1 de 4 condiciones (1) solo salud, 2) solo medio ambiente, 3) salud y medio ambiente combinados, 4) control. En la condición de solo salud, los participantes verán etiquetas con grados de salud y se les puede indicar que intercambien sus selecciones por artículos más saludables. En la condición de solo medio ambiente, los participantes verán etiquetas con grados de impacto climático y se les puede indicar que intercambien sus selecciones por artículos más sostenibles. En la condición de salud y medio ambiente, los participantes verán etiquetas con grados de impacto en la salud y el clima y se les puede indicar que intercambien sus selecciones por artículos más saludables o más sostenibles. En el grupo de control, los participantes no verán ninguna etiqueta ni intercambio. La tienda registrará las selecciones de los participantes. Después de completar la tarea de compra, los participantes completarán una encuesta en línea.
En la tercera visita de estudio, los participantes mantendrán su grupo asignado y se les pedirá que repitan las mismas tareas que en la segunda visita.
Tipo de estudio
Intervencionista
Inscripción (Actual)
1201
Fase
- No aplica
Contactos y Ubicaciones
Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.
Ubicaciones de estudio
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California
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Palo Alto, California, Estados Unidos, 94304
- Stanford School of Medicine
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Criterios de participación
Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
- Adulto Mayor
Acepta Voluntarios Saludables
Sí
Descripción
Criterios de inclusión:
- Mayores de 18 años o más
- Residir en los Estados Unidos
- Sabe leer y hablar inglés.
- Tener acceso a internet para completar las 3 visitas de estudio en línea
Criterios de exclusión:
- Menores de 18 años
- Residir fuera de los Estados Unidos
- No se puede completar una encuesta en inglés
- No tener acceso a Internet para completar las 3 visitas de estudio en línea
Plan de estudios
Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Prevención
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Comparador activo: Control
Sin etiquetas ni cambios.
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Los participantes no verán ninguna etiqueta adicional ni se les ofrecerá ningún intercambio en la tienda de comestibles en línea.
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Experimental: Swaps de salud
Las etiquetas serán "grados nutricionales" para productos y sugerencias de intercambio de reemplazo serán para artículos con una mejor calificación nutricional.
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Los participantes verán etiquetas de "grado de salud" en todos los productos de la tienda de comestibles en línea que indican su salud según lo estimado por las puntuaciones del modelo de perfiles de nutrientes de Ofcom del Reino Unido.
Las etiquetas de puntuación de salud imitarán las etiquetas Nutri-Score, un sistema de etiquetado utilizado en algunos países europeos, que muestra una calificación codificada por colores de "A" (verde) a "F" (rojo) en cada producto.
Los productos con etiquetas "A" y "B" cumplirán el límite del Reino Unido para productos que pueden comercializarse para niños y los productos con etiquetas "C", "D" y "F" son menos saludables que este límite (basado en terciles de Ofcom puntuaciones dentro de cada grupo de alimentos).
Cuando los participantes intentan agregar un producto menos saludable a su carrito (por ejemplo, etiqueta de salud "C", "D" o "F"), la tienda sugerirá automáticamente un producto más saludable de la misma categoría (por ejemplo, con una "A" o etiqueta sanitaria "B").
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Experimental: Intercambios climáticos
Las etiquetas serán "grados climáticos" para productos y sugerencias de intercambio de reemplazo serán para artículos con una mejor calificación climática.
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Los participantes verán etiquetas de "grado climático" en todos los productos que indican su impacto climático.
El impacto climático se calcula como las emisiones de gases de efecto invernadero asociadas con la producción del producto en equivalentes de dióxido de carbono (CO2-EQ) por 100 g (es decir, "huella de carbono").
Las etiquetas se aplicarán en base a quintiles de huellas de carbono en cada grupo de alimentos.
Cuando los participantes intentan agregar un producto de alto impacto climático a su carrito (por ejemplo, con una etiqueta climática "C", "D" o "F"), la tienda les ofrecerá automáticamente intercambios a productos más amigables con el clima (por ejemplo, con una etiqueta climática "o" B ").
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Experimental: Swaps combinados de salud y clima
Las etiquetas serán "grados nutricionales" y "grados climáticos" para productos y sugerencias de intercambio de reemplazo serán para artículos que sean mejores que los productos seleccionados originalmente en al menos una dimensión (grado nutricional o grado climático) y no peores que los productos seleccionados originalmente en cualquier dimensión.
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Los participantes verán las etiquetas de grado de salud y clima en todos los productos en la tienda de comestibles en línea.
Cuando los participantes intentan seleccionar un producto con una etiqueta "C", "D" o "F" en cualquier dimensión a su carrito, la tienda les ofrecerá automáticamente swaps a productos que ofrecen una mejora sobre los alimentos originales en al menos 1 dimensión (salud o amiga climática) y al menos fueron tan buenos o mejores en la otra dimensión, con la guardia adicional que la tienda nunca sugiere que la tienda nunca sugiera productos con un "c" o "o" o dimension.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Healthfulness of Product Selection
Periodo de tiempo: 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
Periodo de tiempo: 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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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Calorie Density of Participants' Grocery Selections
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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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Otras medidas de resultado
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Perceived Helpfulness of Nutrition Labels
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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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Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Anna H. Grummon, PhD, Stanford School of Medicine
Fechas de registro del estudio
Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.
Fechas importantes del estudio
Inicio del estudio (Actual)
7 de mayo de 2025
Finalización primaria (Actual)
25 de junio de 2025
Finalización del estudio (Actual)
25 de junio de 2025
Fechas de registro del estudio
Enviado por primera vez
16 de octubre de 2024
Primero enviado que cumplió con los criterios de control de calidad
16 de octubre de 2024
Publicado por primera vez (Actual)
18 de octubre de 2024
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
24 de junio de 2026
Última actualización enviada que cumplió con los criterios de control de calidad
29 de mayo de 2026
Última verificación
1 de mayo de 2026
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- 76925
- K01HL158608 (Subvención/contrato del NIH de EE. UU.)
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
SÍ
Descripción del plan IPD
Publicaremos los datos en un repositorio público.
Marco de tiempo para compartir IPD
El código analítico se publicará en un repositorio público tras la publicación de los resultados del estudio.
Criterios de acceso compartido de IPD
Disponible públicamente sin restricciones.
Tipo de información de apoyo para compartir IPD
- CÓDIGO_ANALÍTICO
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
No
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
No
producto fabricado y exportado desde los EE. UU.
No
Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .