Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, Philadelphia, PA, 19104, USA.
School of Economics, LeBow College of Business, Drexel University, Philadelphia, PA, 19104, USA.
Nutr J. 2021 Mar 14;20(1):29. doi: 10.1186/s12937-021-00673-w.
Price promotions on sugar-sweetened beverages (SSBs) are commonly used by retailers to provide economic incentives for purchasing. Surprisingly, there is a lack of high-quality articles that examine the frequency and magnitude of sugary beverage discounting and consumer responses to discounts. The objective of this study is to quantify the association between exposure to price discounts and SSB purchases.
This cross-sectional study linked 2016 SSB consumption data from a U.S. household consumer panel (analytic sample N = 11,299 households) and weekly prices at stores where they shopped. We derived percent of the time SSBs were discounted (annual promotion frequency) and the amount of the discount (annual promotion magnitude) and assessed their association with household annual per capita SSB purchase ounces. Linear regression models adjusted for household size, income per capita, age, education, presence of children, race, occupation, region, and urbanicity. We also evaluated whether the association between promotion and purchase varied by socioeconomic status and race subgroups. Data were analyzed in 2019-2020.
On average, households were exposed to SSBs price promotions 44% of the time. A 10-percentage point increase in annual SSB promotion frequency was associated with 13.7% increase in annual per capita purchasing (P < 0.0001), and a 1-percentage point increase in annual SSB promotion magnitude was associated with 15.3% increase in annual per capita purchasing (P < 0.0001). These associations did no vary significantly across socioeconomic status and race subgroups (Interaction P > 0.2).
More frequent and deeper price promotion was associated with higher annual per capita SSB purchases. Restricting SSB price promotions may be effective at reducing SSB consumption.
零售商通常会通过促销含糖饮料（SSB）来提供经济激励以促进购买。令人惊讶的是，缺乏高质量的文章来研究含糖饮料折扣的频率和幅度以及消费者对折扣的反应。本研究的目的是量化接触价格折扣与 SSB 购买之间的关联。
本横断面研究将 2016 年美国家庭消费者小组的 SSB 消费数据（分析样本 N = 11,299 户家庭）与他们购物的商店每周价格进行了关联。我们得出了 SSB 折扣的时间百分比（年度促销频率）和折扣金额（年度促销幅度），并评估了它们与家庭人均 SSB 年度购买量盎司的关系。线性回归模型调整了家庭规模、人均收入、年龄、教育程度、是否有孩子、种族、职业、地区和城市。我们还评估了促销与购买之间的关联是否因社会经济地位和种族亚组而异。数据分析于 2019-2020 年进行。
平均而言，家庭受到 SSB 价格促销的影响约为 44%。年度 SSB 促销频率每增加 10 个百分点，人均年度购买量就会增加 13.7%（P<0.0001），年度 SSB 促销幅度每增加 1 个百分点，人均年度购买量就会增加 15.3%（P<0.0001）。这些关联在社会经济地位和种族亚组之间没有显著差异（交互 P>0.2）。
更频繁和更大幅度的价格促销与更高的人均年度 SSB 购买量相关。限制 SSB 价格促销可能是减少 SSB 消费的有效方法。
