Price discounts significantly enhance fruit and vegetable purchases when combined with nutrition education: a randomized controlled supermarket trial
Price discounts significantly enhance fruit and vegetable purchases when combined with nutrition education: a randomized controlled supermarket trial
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DOI：
10.3945/ajcn.112.041632
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发表时间：
2013-04-01
影响因子：
7.1
通讯作者：
Steenhuis, Ingrid H. M.
中科院分区：
文献类型：
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作者：
Waterlander, Wilma E.;de Boer, Michiel R.;Steenhuis, Ingrid H. M.
背景：降低水果和蔬菜 (F&V) 价格是在健康促进背景下改善饮食习惯的一项经常考虑的政策。然而，有关该干预措施有效性的证据有限。 目的：目的是研究食品和饮料或营养教育或两者结合的 50% 价格折扣对超市购买的影响。设计：在荷兰超市进行了一项为期 6 个月的随机对照试验。经常去超市购物的顾客被随机分配到 4 个条件之一：食品和饮料 50% 价格折扣、营养教育、50% 价格折扣加营养教育，或不干预。共有 199 名参与者提供了基线数据；最终分析纳入 151 名（76%）。使用超市收据在基线、干预开始后 1 个月、3 个月、6 个月（干预期结束）和干预结束后 3 个月（9 个月）测量食品和饮料购买量。结果：调整后的多级模型显示，由于价格折扣（+3.9 公斤；95% CI：1.5、6.3 公斤）和折扣加教育干预，食品和饮料购买量显着增加（每户/2 周）。与对照相比，6 个月时（+5.6 kg；95% CI：3.2，7.9 kg）。此外，在两个折扣组中，食用建议量 F&V（>= 400 克/天）的参与者百分比从基线时的 42.5% 增加到 6 个月时的 61.3%（P = 0.03）。仅靠教育并没有显着效果。结论：对食品和饮料打折是一种很有前途的干预策略，因为它会导致食品和饮料购买量大幅增加，并且没有观察到不利影响。因此，定价策略成为未来干预或政策的重要焦点。然而，长期影响和最终的健康结果需要进一步研究。该试验在 ISRCTN 试验登记册上注册，编号为 ISRCTN56596945，在荷兰试验登记册 (http://www.Trialregister.n1/Trialreg/index.asp) 上注册，编号为 NL22568.029.08 Am J Clin Nutr 2013;97:886-95。
Background: Reducing fruit and vegetable (F&V) prices is a frequently considered policy to improve dietary habits in the context of health promotion. However, evidence on the effectiveness of this intervention is limited.Objective: The objective was to examine the effects of a 50% price discount on F&Vs or nutrition education or a combination of both on supermarket purchases.Design: A 6-mo randomized controlled trial within Dutch supermarkets was conducted. Regular supermarket shoppers were randomly assigned to 1 of 4 conditions: 50% price discounts on F&Vs, nutrition education, 50% price discounts plus nutrition education, or no intervention. A total of 199 participants provided baseline data; 151 (76%) were included in the final analysis. F&V purchases were measured by using supermarket register receipts at baseline, at 1 mo after the start of the intervention, at 3 mo, at 6 mo (end of the intervention period), and 3 mo after the intervention ended (9 mo).Results: Adjusted multilevel models showed significantly higher F&V purchases (per household/2 wk) as a result of the price discount (+3.9 kg; 95% CI: 1.5, 6.3 kg) and the discount plus education intervention (+5.6 kg; 95% CI: 3.2, 7.9 kg) at 6 mo compared with control. Moreover, the percentage of participants who consumed recommended amounts of F&Vs (>= 400 g/d) increased from 42.5% at baseline to 61.3% at 6 mo in both discount groups (P = 0.03). Education alone had no significant effect.Conclusions: Discounting F&Vs is a promising intervention strategy because it resulted in substantially higher F&V purchases, and no adverse effects were observed. Therefore, pricing strategies form an important focus for future interventions or policy. However, the long-term effects and the ultimate health outcomes require further investigation. This trial was registered at the ISRCTN Trial Register as number ISRCTN56596945 and at the Dutch Trial Register (http://www.trialregister.n1/trialreg/index.asp) as number NL22568.029.08 Am J Clin Nutr 2013;97:886-95.