Massachusetts General Hospital, 165 Cambridge St., Suite 402, Boston, MA 02114, USA.
Prev Med. 2013 Oct;57(4):253-7. doi: 10.1016/j.ypmed.2013.07.001. Epub 2013 Jul 13.
We surveyed customers in a hospital cafeteria in Boston, Massachusetts before and after implementation of traffic light food labeling to determine the effect of labels on customers' awareness and purchase of healthy foods.
Cafeteria items were identified as red (unhealthy), yellow (less healthy), or green (healthy). Customers were interviewed before (N=166) and after (N=223) labeling was implemented. Each respondent was linked to cash register data to determine the proportion of red, yellow, and green items purchased. Data were collected from February-April 2010. We compared responses to survey questions and mean proportion of red, yellow, and green items per transaction between customers interviewed during baseline and customers interviewed during the intervention. Survey response rate was 60%.
Comparing responses during labeling intervention to baseline, more respondents identified health/nutrition as an important factor in their purchase (61% vs. 46%, p=0.004) and reported looking at nutrition information (33% vs. 15%, p<0.001). Respondents who noticed labels during the intervention and reported that labels influenced their purchases were more likely to purchase healthier items than respondents who did not notice labels (p<0.001 for both).
Traffic light food labels prompted individuals to consider their health and to make healthier choices at point-of-purchase.
我们在马萨诸塞州波士顿的一家医院自助餐厅实施红绿灯食品标签前后对顾客进行了调查，以确定标签对顾客对健康食品的意识和购买行为的影响。
将自助餐厅的食物标记为红色（不健康）、黄色（不太健康）或绿色（健康）。在标签实施前后（N=166 和 N=223）对顾客进行了访谈。每个受访者都与收银机数据相关联，以确定购买的红色、黄色和绿色物品的比例。数据收集于 2010 年 2 月至 4 月。我们比较了调查问题的回答和每个交易中红色、黄色和绿色物品的平均比例，比较了在基线期间接受访谈的顾客和在干预期间接受访谈的顾客。调查响应率为 60%。
与基线相比，更多的受访者表示健康/营养是他们购买的重要因素（61%对 46%，p=0.004），并表示会查看营养信息（33%对 15%，p<0.001）。在干预期间注意到标签并表示标签影响了他们购买的受访者比没有注意到标签的受访者更有可能购买更健康的物品（p<0.001）。
红绿灯食品标签促使个人考虑他们的健康，并在购买时做出更健康的选择。
