Department of Health Science, Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.
Chair Group Consumption and Healthy Lifestyles, Wageningen University & Research, Hollandseweg 1, 6706 KN Wageningen, The Netherlands.
Int J Environ Res Public Health. 2020 Nov 19;17(22):8611. doi: 10.3390/ijerph17228611.
Most snacks displayed at supermarket checkouts do not contribute to a healthy diet. We investigated the effects of introducing healthier snack alternatives at checkouts in supermarkets on purchasing behavior. In Study 1, we investigated the effect of completely substituting less healthy with healthier snacks (one supermarket). In Study 2, we investigated the effect of placing and discounting healthier snacks while the less healthy snacks remain in place (two supermarkets). In both studies, the number of purchased snacks (per 1000 customers) was used as the outcome variable. Results for Study 1 showed that the absolute number of purchased checkout snacks was 2.4 times lower (95% confidence interval (CI): 1.9-2.7) when healthier snacks instead of less healthy snacks were placed at the supermarket checkouts. Results for Study 2 showed that when additional healthier snacks were placed near the checkouts, the absolute number of healthier purchased snacks increased by a factor of 2.1 (95% CI: 1.3-3.3). When additional healthier snacks were placed near the checkouts and discounted, the absolute number of healthier purchased snacks increased by a factor of 2.7 (95% CI: 2.0-3.6), although this was not statistically significant higher than placement only (ratio: 1.1, 95% CI: 0.7-1.9). Purchases of less healthy snacks did not decline, and even slightly increased, during the intervention period (ratio: 1.3, 95% CI: 1.1-1.5). If supermarkets want to promote healthier snack purchases, additional healthier products can be positioned near the checkouts. However, this does not discourages the purchase of less healthy snacks. Therefore, to discourage unhealthy snack purchases at supermarket checkouts, a total substitution of less healthy snacks with healthier alternatives is most effective.
大多数在超市收银台展示的零食都不能促进健康饮食。我们研究了在超市收银台引入更健康的零食替代品对购买行为的影响。在研究 1 中，我们研究了用更健康的零食完全替代不太健康的零食（一家超市）的效果。在研究 2 中，我们研究了在保留不太健康的零食的同时放置和打折更健康的零食的效果（两家超市）。在这两项研究中，购买的零食数量（每 1000 名顾客）用作结果变量。研究 1 的结果表明，当超市收银台放置更健康的零食而不是不太健康的零食时，购买的收银台零食数量绝对减少了 2.4 倍（95%置信区间 (CI)：1.9-2.7）。研究 2 的结果表明，当在收银台附近放置更多的健康零食时，购买的健康零食数量增加了 2.1 倍（95%CI：1.3-3.3）。当在收银台附近放置并打折更多的健康零食时，购买的健康零食数量增加了 2.7 倍（95%CI：2.0-3.6），尽管这与仅放置相比没有统计学意义上的更高（比值：1.1，95%CI：0.7-1.9）。在干预期间，不太健康零食的购买量没有下降，甚至略有增加（比值：1.3，95%CI：1.1-1.5）。如果超市想要促进健康零食的购买，可以在收银台附近放置更多的健康产品。然而，这并没有阻止购买不太健康的零食。因此，要阻止在超市收银台购买不健康的零食，最有效的方法是用更健康的替代品完全替代不太健康的零食。
