文章基本信息

标题：Caloric Beverage Intake Among Adult Supplemental Nutrition Assistance Program Participants
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作者：Jessica E. Todd ; Michele Ver Ploeg
期刊名称：American journal of public health
印刷版ISSN：0090-0036
出版年度：2014
卷号：104
期号：9
页码：e80-e85
DOI：10.2105/AJPH.2014.301970
语种：English
出版社：American Public Health Association
摘要：Objectives. We compared sugar-sweetened beverage (SSB), alcohol, and other caloric beverage (juice and milk) consumption of Supplemental Nutrition Assistance Program (SNAP) participants with that of low-income nonparticipants. Methods. We used 1 day of dietary intake data from the 2005–2008 National Health and Nutrition Examination Survey for 4594 adults aged 20 years and older with household income at or below 250% of the federal poverty line. We used bivariate and multivariate methods to compare the probability of consuming and the amount of calories consumed for each beverage type across 3 groups: current SNAP participants, former participants, and nonparticipants. We used instrumental variable methods to control for unobservable differences in participant groups. Results. After controlling for observable characteristics, SNAP participants were no more likely to consume SSBs than were nonparticipants. Instrumental variable estimates showed that current participants consumed fewer calories from SSBs than did similar nonparticipants. We found no differences in alcoholic beverage consumption, which cannot be purchased with SNAP benefits. Conclusions. SNAP participants are not unique in their consumption of SSBs or alcoholic beverages. Purchase restrictions may have little effect on SSB consumption. People in the Unites States consume about 20% of their calories from beverages, a share that has increased greatly over recent decades. 1 Calories from beverages may be less satiating than calories from food and may therefore contribute to weight gain. 2–5 Calories from sugar-sweetened beverages (SSBs) may be particularly problematic because they provide little if any essential nutrients. Policies suggested or enacted to reduce SSB consumption include taxing SSB purchases 6–9 and restricting the size of SSBs sold by food service establishments. Most recently, the discussion has moved to whether participants in the Supplemental Nutrition Assistance Program (SNAP) should be prohibited from using benefits to purchase SSBs. SNAP provides nutrition assistance to low-income individuals and families through electronic benefit transfer cards that can be used to purchase food at authorized food retailers. SNAP benefits can be used to purchase almost all foods, with the exceptions of hot foods or food that will be eaten in the stores, alcoholic beverages and tobacco products. New York City requested a waiver from the Food and Nutrition Service of the US Department of Agriculture to restrict the use of SNAP benefits for purchases of some SSBs 10 but was denied. Several high-profile commentators argued that the SNAP program may be subsidizing obesity and should be modified to encourage greater consumption of healthy foods and reduced consumption of empty calories such as SSBs. 11,12 Others have argued that such restrictions could increase administrative costs but would have little impact on consumption patterns because most participants’ SNAP benefit only covers a portion of the household’s total food spending, and they could just use their cash food budgets to purchase SSBs. 13 It has also been argued 14 that imposing restrictions on only 1 part of the population is unfair when consumption of SSBs and obesity are fairly widespread among all Americans. Restrictions on SNAP purchases could have unintended consequences, such as reducing participation or substitution with other energy-dense foods. Despite the prominent appeals to restrict SNAP participants’ purchases, little evidence has shown that SNAP participants’ SSB consumption is different from that of the average consumer or other low-income consumers. Using longitudinal data for a cohort of US youths, no differences were found between SNAP participants and otherwise similar nonparticipants in the frequency of consumption (not total calories) of soft drinks, 100% fruit juice, and milk. 15 Purchases of different beverages at 1 chain grocery store in New England for a sample of families that participated in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) program over a 2-year period showed that among the participants, those who also received SNAP benefits purchased a higher percentage of SSBs than did non-SNAP participants. 16 This study did not consider all SNAP households (or any other low-income households that did not participate in either SNAP or the Special Supplemental Nutrition Program for Women, Infants, and Children); examined beverage purchases at only 1 grocery store chain in New England; did not consider beverage purchases at bars, restaurants, or other food retailers; and did not consider beverage intake among household members. Both of these studies examined only a segment of all SNAP participants. Alcoholic beverages contribute a sizable share of total beverage calories for those who consume them. Alcoholic beverages cannot be purchased with SNAP benefits. If SSB purchases are restricted in SNAP, participants could use other resources to purchase SSBs, just as they may to purchase alcoholic beverages. Although there are important distinctions between SSBs and alcohol (e.g., tax rates, controlled points of purchase, limits on who can purchase, and some health benefits of moderate consumption), examining how alcohol consumption differs between participants and nonparticipants may provide insight into how a restriction on SSBs could affect purchases among SNAP participants. We used national-level data on individual beverage intake to investigate intake of SSBs, alcohol, and other caloric beverages (milk and juice) for SNAP participants and otherwise similar nonparticipants. After comparing average intake of these beverage types, we used regression to explore whether differences across participant groups are explained by differences in observable characteristics. We separately estimated the probability of consuming each beverage type and the total number of calories consumed among consumers of each beverage. We augmented our main estimates with instrumental variable estimates that account for self-selection of SNAP participants.