食料品購入の健康と環境の持続可能性を改善するための食品交換
2026年5月29日 更新者：Anna Grummon、Stanford University
食料品購入の健康と環境の持続可能性を改善するための食品交換のランダム化試験
この研究の目的は、オンライン食料品店環境でより健康的またはより環境的に持続可能なスワップ（またはその両方）の推奨を受けることが、スワップの推奨を受けずに通常通り買い物をする場合と比較して、消費者の食品および飲料の購入の健康性と環境の持続可能性を向上させるかどうかを判断することです。
オンラインストアは参加者の選択を記録します。
参加者にはアンケートへの回答も求められます。
調査の概要
状態
完了
詳細な説明
参加者はオンラインで被験者間のランダム化実験を完了します。 この実験には 3 回の調査訪問が含まれます。
最初の研究訪問では、参加者は介入なしでオンライン食料品店での買い物タスクを完了します。 参加者には50ドルの予算が与えられ、通常通り買い物をするよう求められます。 ストアは参加者の選択を記録します。 買い物タスクを完了した後、参加者はオンライン アンケートに回答します。
約 1 週間後、参加者は同じ指示に従って 2 回目の調査訪問を完了します。 それらは、4 つの状態 (1) 健康のみ、2) 環境のみ、3) 健康と環境の組み合わせ、4) コントロールのいずれかにランダムに割り当てられます。 健康のみの条件では、参加者は健康グレードのラベルを表示し、選択内容をより健康的なアイテムに交換するよう指示される場合があります。 環境のみの条件では、参加者は気候影響グレードのラベルを表示し、選択をより持続可能なアイテムに交換するよう指示される場合があります。 健康と環境の状態では、参加者は健康と気候への影響等級が記載されたラベルを表示し、選択内容をより健康的またはより持続可能なアイテムに交換するよう指示される場合があります。 コントロール グループでは、参加者はラベルやスワップを表示しません。 ストアは参加者の選択を記録します。 買い物タスクを完了した後、参加者はオンライン アンケートに回答します。
3 回目の調査訪問では、参加者は割り当てられたグループを維持し、2 回目の訪問と同じタスクを繰り返すように求められます。
研究の種類
介入
入学 (実際)
1201
段階
- 適用できない
連絡先と場所
このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。
研究場所
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California
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Palo Alto、California、アメリカ、94304
- Stanford School of Medicine
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参加基準
研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
はい
説明
包含基準:
- 18歳以上
- 米国在住
- 英語を読んだり話したりできる
- 3 回のオンライン学習訪問を完了するためにインターネットにアクセスできること
除外基準:
- 18歳未満
- 米国外に居住している
- 英語でアンケートに回答できない
- 3 回のオンライン学習訪問を完了するためにインターネットにアクセスできない
研究計画
このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。
研究はどのように設計されていますか？
デザインの詳細
- 主な目的：防止
- 割り当て：ランダム化
- 介入モデル：並列代入
- マスキング：なし（オープンラベル）
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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アクティブコンパレータ：コントロール
ラベルや交換はありません。
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参加者は、オンライン食料品店で余分なラベルを表示したり、交換を提案されたりすることはありません。
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実験的：健康スワップ
ラベルは、製品の「栄養グレード」となり、交換用のスワップ提案は、より良い栄養グレードのアイテムのものです。
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参加者は、オンライン食料品店のすべての製品に、英国の Ofcom 栄養素プロファイリング モデル スコアによって推定された健康状態を示す「健康グレード」ラベルが表示されます。
ヘルススコアラベルは、ヨーロッパの一部の国で使用されているラベルシステムであるニュートリスコアラベルを模倣し、各製品に「A」（緑）から「F」（赤）までの色分けされたグレードを示します。
「A」および「B」ラベルの付いた製品は、英国で子供向けに販売できる製品の基準を満たしており、「C」、「D」、および「F」ラベルの付いた製品は、この基準よりも健康的ではありません（Ofcom の三分位に基づく）各食品グループ内のスコア）。
参加者があまり健康的ではない製品 (例: 「C」、「D」、または「F」の健康ラベル) をカートに追加しようとすると、ストアは同じカテゴリのより健康的な製品 (例: 「A」) を自動的に提案します。または「B」健康ラベル）。
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実験的：気候交換
ラベルは、製品の「気候グレード」となり、交換用のスワップ提案は、気候グレードの良いアイテムのものです。
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参加者は、気候への影響を示すすべての製品で「気候グレード」ラベルを表示します。
気候への影響は、100gあたりの二酸化炭素相当物（CO2-EQ）の製品の生産に関連する温室効果ガス排出量として計算されます（つまり、「炭素排出量」）。
ラベルは、各食品グループの二酸化炭素排出量の五分位に基づいて適用されます。
参加者がカートに高気候衝撃製品を追加しようとすると（たとえば、「C、」「D」、または「F」気候ラベルなど）、ストアはより気候に優しい製品（「A」または「B」の気候ラベルなど）にスワップを自動的に提供します。
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実験的：健康と気候の組み合わせスワップ
ラベルは、製品の「栄養グレード」および「気候グレード」となり、交換用のスワップ提案は、少なくとも1つの次元（栄養グレードまたは気候グレード）で最初に選択された製品よりも優れたアイテムのものであり、どちらの次元でも最初に選択された製品よりも悪いことではありません。
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参加者は、オンライン食料品店のすべての製品で健康と気候グレードの両方のラベルを表示します。
参加者がカートのいずれかの寸法に「c」、「d」、または「f」ラベルを持つ製品を選択しようとすると、ストアは少なくとも1次元（健康または気候のやりがい）で元の食品を改善する製品にスワップを自動的に提供し、少なくとも他の次元では少なくともそれ以上の優れています。
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Healthfulness of Product Selection
時間枠：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
時間枠：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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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Calorie Density of Participants' Grocery Selections
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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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その他の成果指標
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Perceived Helpfulness of Nutrition Labels
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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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協力者と研究者
ここでは、この調査に関係する人々や組織を見つけることができます。
スポンサー
捜査官
- 主任研究者：Anna H. Grummon, PhD、Stanford School of Medicine
研究記録日
これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。
主要日程の研究
研究開始 (実際)
2025年5月7日
一次修了 (実際)
2025年6月25日
研究の完了 (実際)
2025年6月25日
試験登録日
最初に提出
2024年10月16日
QC基準を満たした最初の提出物
2024年10月16日
最初の投稿 (実際)
2024年10月18日
学習記録の更新
投稿された最後の更新 (実際)
2026年6月24日
QC基準を満たした最後の更新が送信されました
2026年5月29日
最終確認日
2026年5月1日
詳しくは
本研究に関する用語
その他の研究ID番号
- 76925
- K01HL158608 (米国 NIH グラント/契約)
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
はい
IPD プランの説明
データを公開リポジトリに投稿します。
IPD 共有時間枠
分析コードは、研究結果が発表されると公開リポジトリに投稿されます。
IPD 共有アクセス基準
制限なく公開されています。
IPD 共有サポート情報タイプ
- ANALYTIC_CODE
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
いいえ
米国FDA規制機器製品の研究
いいえ
米国で製造され、米国から輸出された製品。
いいえ
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。