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促进健康食品购买的策略:一项超市干预试点研究。

Strategies to promote healthier food purchases: a pilot supermarket intervention study.

作者信息

Ni Mhurchu Cliona, Blakely Tony, Wall Joanne, Rodgers Anthony, Jiang Yannan, Wilton Jenny

机构信息

Clinical Trials Research Unit, School of Population Health, University of Auckland, Private Bag 92019, Auckland, New Zealand.

出版信息

Public Health Nutr. 2007 Jun;10(6):608-15. doi: 10.1017/S136898000735249X. Epub 2007 Mar 5.

Abstract

OBJECTIVE

To pilot the design and methodology for a large randomised controlled trial (RCT) of two interventions to promote healthier food purchasing: culturally appropriate nutrition education and price discounts.

DESIGN

A 12-week, single-blind, pilot RCT. Effects on food purchases were measured using individualised electronic shopping data ('Shop 'N Go' system). Partial data were also collected on food expenditure at other (non-supermarket) retail outlets.

SETTING

A supermarket in Wellington, New Zealand.

PARTICIPANTS

Eligible customers were those who were the main household shoppers, shopped mainly at the participating store, and were registered to use the Shop 'N Go system. Ninety-seven supermarket customers (72% women; age 40 +/- 9.6 years, mean +/- standard deviation) were randomised to one of four intervention groups: price discounts, nutrition education, a combination of price discounts and nutrition education, or control (no intervention).

RESULTS

There was a 98% follow-up rate of participants, with 85% of all reported supermarket purchases being captured via the electronic data collection system. The pilot did, however, demonstrate difficulty recruiting Maori, Pacific and low-income shoppers using the electronic register and mail-out.

CONCLUSIONS

This pilot study showed that electronic sales data capture is a viable way to measure effects of study interventions on food purchases in supermarkets, and points to the feasibility of conducting a large-scale RCT to evaluate the effectiveness of price discounts and nutrition education. Recruitment strategies will, however, need to be modified for the main trial in order to ensure inclusion of all ethnic and socio-economic groups.

摘要

目的

为一项大型随机对照试验(RCT)试行设计和方法,该试验旨在探讨两种促进更健康食品购买的干预措施:符合文化背景的营养教育和价格折扣。

设计

一项为期12周的单盲试点随机对照试验。使用个性化电子购物数据(“购物通”系统)来衡量对食品购买的影响。还收集了其他(非超市)零售网点食品支出的部分数据。

地点

新西兰惠灵顿的一家超市。

参与者

符合条件的顾客是那些家庭主要购物者,主要在参与试验的商店购物,并注册使用“购物通”系统的人。97名超市顾客(72%为女性;年龄40±9.6岁,均值±标准差)被随机分配到四个干预组之一:价格折扣组、营养教育组、价格折扣与营养教育组合组或对照组(无干预)。

结果

参与者的随访率为98%,通过电子数据收集系统记录了所有报告的超市购买行为中的85%。然而,该试点研究表明,使用电子收银机和邮寄方式招募毛利人、太平洋岛民和低收入购物者存在困难。

结论

这项试点研究表明,电子销售数据采集是衡量研究干预措施对超市食品购买影响的一种可行方法,并指出开展大规模随机对照试验以评估价格折扣和营养教育效果的可行性。然而,主要试验的招募策略需要修改,以确保纳入所有种族和社会经济群体。

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