Introduction:
Sugary drink consumption is a major risk factor for excess weight gain. In 2013, Howard County, MD launched a multi-component campaign to decrease sugary drink consumption. A previously published difference-in-differences (DID) analysis of supermarket retail beverage sales from 2012 (baseline) to 2015 documented a significant decrease in regular soda and fruit drinks sales in intervention stores compared to matched control stores. The present study extends this evaluation through 2018.
Hypothesis:
Sugary drink sales will continue to decrease and sales of non-sugary drinks will increase through 2018.
Methods:
Prior to the intervention, a retail sales tracking company identified a sample of supermarkets (N=15) in Howard County (Intervention stores) and assessed 52-weeks of top brand sales for each beverage category. These data were used to identify a set of matched Control stores (N=17) in an adjacent state. DID analyses were used to compare the weekly volume sales of each product (brand and package size) within each beverage category in the Intervention and Control stores from baseline (2012) to Year 6 (2018). Models were adjusted for relevant variables, including average price/ounce; average competitor price/ounce; and weekly local temperature.
Results:
DID analyses identified a significantly larger net decrease in average weekly volume sales of regular soda, fruit drinks, and 100% juice in the Intervention stores compared to the Control stores over six years (p < .001). See Figure for regular soda sales. After 2015, intervention stores also exhibited significant increases in sales of plain bottled water (p < .0001) and carbonated water (p < .001). In contrast, sports drinks, diet soda, and flavored waters did not consistently differ between conditions.
Conclusion:
A locally implemented, multi-component campaign reduced regular soda and fruit drink sales over six years. Additional efforts to reduce sales of sports drinks are warranted.
Is Consumer Response to Plain/Standardised Tobacco Packaging Consistent with Framework Convention on Tobacco Control Guidelines? A Systematic Review of Quantitative Studies
