目标:评估更健康选择的增加对购买在英国休闲(运动)中心出售的不同类型的自动售货机零食产品的影响。
方法:使用pre-post方法和中断时间序列分析对干预进行评估。自动售货机内的产品在三个阶段进行了更改,以增加更健康选择的可用性,使用商定的营养标准-英国食品和餐饮服务政府购买标准(GBSF)-作为指南;以及产品可用性。主要结果是第一阶段和第三阶段之间平均每周购买能量的变化。次要结果包括按阶段和每周购买数量的变化,脂肪,糖和盐适用于所有产品的组合和个别产品类别。
方法:利兹市的15个体育中心,西约克郡,英国。
方法:在18台自动售货机上销售的零食产品。
结果:购买的能源从基线减少到第二阶段,所有产品类别的总和,每台机器按47.25MJ(95%CI-61.22至-33.27MJ)计算,按279KJ计算,(95%CI-325至-266KJ)每产品单位。除巧克力糖果外,所有产品类别中购买的大多数营养素都减少了。除巧克力糖果中的饱和脂肪外,所有产品类别的每产品单位营养素均下降。确定了基线阶段的最小潜在趋势,表明结局的变化可能是由于干预.
结论:引入标准以增加自动售货机中更健康的零食产品的可用性是可行的,而不会实质性地影响销售。
OBJECTIVE: To evaluate the impact of increased availability of healthier options on purchasing of different types of vending snack products sold in English leisure (sports) centres.
METHODS: An evaluation of an intervention using pre-post methods and interrupted time series analysis. Products within the vending machines were altered over three phases to increase the availability of healthier options, using agreed nutrition criteria - Government Buying Standards for Food and Catering Services (GBSF) for England - as a guide, as well as product availability. The primary outcome was the change in mean weekly purchased energy between the first and third phase. Secondary outcomes included changes by phase and by week in weekly number of purchases, fats, sugars and salt for all products combined and by individual product categories.
METHODS: Fifteen sports centres in the city of Leeds, West Yorkshire, UK.
METHODS: Snack products sold in eighteen vending machines.
RESULTS: Energy purchased reduced from baseline to phase 2, for all product categories combined, by 47·25 MJ (95 % CI (-61·22, -33·27)) per machine and by 279 kJ, (95 % CI (-325, -266)) per product unit. There were reductions in most nutrients purchased in all individual product categories except chocolate confectionery. Nutrients per product unit decreased for all product categories except saturated fat in chocolate confectionery. Minimal underlying trends in the baseline phase were identified, indicating changes in outcomes were likely to be due to the intervention.
CONCLUSIONS: Introducing standards to increase availability of healthier snack products in vending machines is feasible without substantially affecting sales.