BACKGROUND Limited evidence has been gathered on the real-world impact of sugar-sweetened beverage price changes on purchasing behavior over time or in community-retail settings. OBJECTIVE Our aim was to determine changes in beverage purchases, business outcomes, and customer and retailer satisfaction associated with a retailer-led sugar-sweetened beverage price increase in a convenience store. We hypothesized that purchases of less-healthy beverages would decrease compared to predicted sales. DESIGN A convergent parallel mixed methods design complemented sales data (122 weeks pre-intervention, 17 weeks during intervention) with stakeholder interviews and customer surveys. PARTICIPANTS/SETTING Electronic beverage sales data were collected from a convenience store in Melbourne, Australia (August through November 2015). Convenience store staff completed semi-structured interviews (n=4) and adult customers exiting the store completed surveys (n=352). INTERVENTION Beverages were classified using a state government framework. Prices of "red" beverages (eg, nondiet soft drinks, energy drinks) increased by 20%. Prices of "amber" (eg, diet soft drinks, small pure fruit juices) and "green" beverages (eg, water) were unchanged. MAIN OUTCOME MEASURES Changes in beverage volume, item sales, and revenue during the intervention were compared with predicted sales. STATISTICAL ANALYSES Sales data were analyzed using time series segmented regression while controlling for pre-intervention trends, autocorrelation in sales data, and seasonal fluctuations. RESULTS Beverage volume sales of red (-27.6%; 95% CI -32.2 to -23.0) and amber (-26.7%; 95% CI -39.3 to -16.0) decreased, and volume of green beverages increased (+26.9%; 95% CI +14.1 to +39.7) in the 17th intervention week compared with predicted sales. Store manager and staff considered the intervention business-neutral, despite a small reduction in beverage revenue. Fifteen percent of customers noticed the price difference and 61% supported the intervention. CONCLUSIONS A 20% sugar-sweetened beverage price increase was associated with a reduction in their purchases and an increase in purchases of healthier alternatives. Community retail settings present a bottom-up approach to improving consumer beverage choices.

中文翻译：

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零售商主导的含糖饮料价格上涨减少了澳大利亚墨尔本医院便利店的购买量：混合方法评估

背景 已收集到的关于含糖饮料价格随时间变化或在社区零售环境中对购买行为的真实影响的证据有限。目标我们的目标是确定与便利店中零售商主导的含糖饮料价格上涨相关的饮料购买、业务成果以及客户和零售商满意度的变化。我们假设与预测的销售额相比，不太健康的饮料的购买量会减少。设计 收敛平行混合方法设计通过利益相关者访谈和客户调查补充了销售数据（干预前 122 周，干预期间 17 周）。参与者/设置 电子饮料销售数据来自澳大利亚墨尔本的一家便利店（2015 年 8 月至 11 月）。便利店员工完成了半结构化访谈（n=4），离开商店的成年顾客完成了调查（n=352）。干预 使用州政府框架对饮料进行分类。“红色”饮料（例如非减肥软饮料、能量饮料）的价格上涨了 20%。“琥珀”（例如，无糖软饮料、小量纯果汁）和“绿色”饮料（例如，水）的价格没有变化。主要观察指标将干预期间饮料数量、商品销售和收入的变化与预测销售进行比较。统计分析 使用时间序列分段回归分析销售数据，同时控制干预前趋势、销售数据的自相关和季节性波动。结果 红色 (-27.6%; 95% CI -32.2 至 -23.0) 和琥珀色 (-26.7%; 95% CI -39.3 至 -16.0) 在第 17 个干预周与预测销售额相比下降，绿色饮料的销量增加（+26.9%；95% CI +14.1 至 +39.7）。尽管饮料收入略有减少，但商店经理和员工认为干预措施与业务无关。15% 的客户注意到价格差异，61% 的客户支持干预。结论 含糖饮料价格上涨 20% 与他们的购买量减少和更健康替代品的购买量增加有关。社区零售环境提出了一种自下而上的方法来改善消费者的饮料选择。尽管饮料收入略有减少，但商店经理和员工认为干预措施与业务无关。15% 的客户注意到价格差异，61% 的客户支持干预。结论 含糖饮料价格上涨 20% 与他们的购买量减少和更健康替代品的购买量增加有关。社区零售环境提出了一种自下而上的方法来改善消费者的饮料选择。尽管饮料收入略有减少，但商店经理和员工认为干预措施与业务无关。15% 的客户注意到价格差异，61% 的客户支持干预。结论 含糖饮料价格上涨 20% 与他们的购买量减少和更健康替代品的购买量增加有关。社区零售环境提出了一种自下而上的方法来改善消费者的饮料选择。