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        ORIGINAL RESEARCH

        Buying Food on Sale: A Mixed Methods Study With Shoppers at an Urban Supermarket, Philadelphia, Pennsylvania, 2010–2012

        Food CategoryMean Percentage of Weeks on Sale (95% Confidence Interval)
        Low-calorie foods19.2 (15.4–25.1)
        Fruit16.5 (12.7–20.7)
        Vegetables21.4 (14.9–31.9)
        Low-fat dairy19.0 (5.0–37.1)
        High-calorie foods25.7 (21.6–30.4)
        Sweet snacks15.3 (12.6–20.0)
        Savory snacks32.0 (21.8–48.3)
        Sugar-sweetened beverages35.0 (26.6–41.9)
        Grain-based snacks22.5 (15.5–29.6)


        Figure.
        Mean percentage of weeks foods were on sale, by food category and aggregate food category, in an urban supermarket, Philadelphia, Pennsylvania, April through August 2010 and December 2010 through October 2012.

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