Huitink Marlijn, Poelman Maartje P, Seidell Jacob C, Twisk Jos W R, Dijkstra S Coosje
Department of Health Sciences, Faculty of Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam, 1081 HV, Netherlands.
Amsterdam Public Health, Amsterdam, The Netherlands.
BMC Med. 2025 Jan 9;23(1):14. doi: 10.1186/s12916-024-03828-8.
Dutch adolescents predominantly purchase unhealthy snacks in supermarkets, which negatively influence their health. The aim of this study was to investigate the short- and longer-term effects of a nutrition peer-education intervention in supermarkets on food purchases and determinants of food purchase behaviour among adolescents of different education levels.
We performed a quasi-experimental study in three supermarkets (two intervention and one comparison school) in Amsterdam, the Netherlands. The intervention schools received a 45-min peer-education workshop in the supermarket near their school, and the comparison school received no intervention. The workshops also included a 2-week 'healthy snacking challenge' and were led by two young supermarket employees. Measurements were performed 2 weeks before the intervention (T0) 2 weeks after (T1) and 3 months (T2) after the intervention. Cash receipts were used to examine food purchases (n = 458) and questionnaires to examine determinants of food purchase behaviour (n = 463).
The nutrition peer-education intervention did not improve food purchases but did improve several determinants of food purchase behaviour. Adolescents from the intervention schools reported improved nutritional knowledge (β = 0.38, 95% CI: 0.04-0.72) at T1, more favourable attitudes (β = 0.21, 95% CI: 0.00-0.42) and stronger social support (β = 0.27, 95% CI: 0.02-0.53) for healthy food purchases at T2 compared to those from the comparison schools. Adolescents with a low level of education reported more short- and longer-term improvements of determinants of food purchase behaviour compared to those with a higher level of education.
While nutrition peer education in supermarkets did not improve adolescents' food purchases in the supermarket, determinants of food purchase behaviour did improve. The intervention was especially effective among adolescents with a low level of education. Nevertheless, to promote healthy food purchases of adolescents in supermarkets, more efforts are needed.
荷兰青少年主要在超市购买不健康零食，这对他们的健康产生负面影响。本研究的目的是调查超市中营养同伴教育干预对不同教育水平青少年食品购买及食品购买行为决定因素的短期和长期影响。
我们在荷兰阿姆斯特丹的三家超市（两家干预超市和一家对照超市）进行了一项准实验研究。干预学校在其学校附近的超市接受了一场45分钟的同伴教育工作坊，对照学校未接受干预。这些工作坊还包括为期两周的“健康零食挑战”，由两名年轻的超市员工主持。在干预前2周（T0）、干预后2周（T1）和干预后3个月（T2）进行测量。使用收银小票检查食品购买情况（n = 458），并通过问卷调查食品购买行为的决定因素（n = 463）。
营养同伴教育干预并未改善食品购买情况，但确实改善了食品购买行为的几个决定因素。与对照学校的青少年相比，干预学校的青少年在T1时报告营养知识有所提高（β = 0.38，95%置信区间：0.04 - 0.72），在T2时对健康食品购买的态度更积极（β = 0.21，95%置信区间：0.00 - 0.42），社会支持更强（β = 0.27，95%置信区间：0.02 - 0.53）。与教育水平较高的青少年相比，教育水平较低的青少年在食品购买行为决定因素方面的短期和长期改善更多。
虽然超市中的营养同伴教育并未改善青少年在超市的食品购买情况，但食品购买行为的决定因素确实得到了改善。该干预措施在教育水平较低的青少年中尤其有效。然而，要促进青少年在超市购买健康食品，还需要做出更多努力。
