- Research article
- Open Access
Household food insecurity and dietary patterns in rural and urban American Indian families with young children
BMC Public Health volume 17, Article number: 611 (2017)
High food insecurity has been demonstrated in rural American Indian households, but little is known about American Indian families in urban settings or the association of food insecurity with diet for these families. The purpose of this study was to examine the prevalence of food insecurity in American Indian households by urban-rural status, correlates of food insecurity in these households, and the relationship between food insecurity and diet in these households.
Dyads consisting of an adult caregiver and a child (2–5 years old) from the same household in five urban and rural American Indian communities were included. Demographic information was collected, and food insecurity was assessed using two validated items from the USDA Household Food Security Survey. Factors associated with food insecurity were examined using logistic regression. Child and adult diets were assessed using food screeners. Coping strategies were assessed through focus group discussions. These cross-sectional baseline data were collected from 2/2013 through 4/2015 for the Healthy Children, Strong Families 2 randomized controlled trial of a healthy lifestyles intervention for American Indian families.
A high prevalence of food insecurity was determined (61%) and was associated with American Indian ethnicity, lower educational level, single adult households, WIC participation, and urban settings (p = 0.05). Food insecure adults had significantly lower intake of vegetables (p < 0.05) and higher intakes of fruit juice (<0.001), other sugar-sweetened beverages (p < 0.05), and fried potatoes (p < 0.001) than food secure adults. Food insecure children had significantly higher intakes of fried potatoes (p < 0.05), soda (p = 0.01), and sports drinks (p < 0.05). Focus group participants indicated different strategies were used by urban and rural households to address food insecurity.
The prevalence of food insecurity in American Indian households in our sample is extremely high, and geographic designation may be an important contributing factor. Moreover, food insecurity had a significant negative influence on dietary intake for families. Understanding strategies employed by households may help inform future interventions to address food insecurity.
(NCT01776255). Registered: January 16, 2013. Date of enrollment: February 6, 2013.
Food insecurity is a growing public health concern in the United States, particularly among young children. In October 2015, the American Academy of Pediatrics urged physicians to screen children for food insecurity in recognition of the adverse health outcomes associated with inadequate access to food . American Indian families may be particularly vulnerable, as they experience higher rates of factors associated with food insecurity, including poverty , limited access to healthy foods [3,4,5,6], and decreased food sovereignty (i.e., “community-level food security”, which includes access to culturally appropriate food ). Data on food insecurity in American Indian families are lacking in national datasets, but food insecurity rates as high as 75% have been reported in smaller studies of tribal communities [8,9,10]. To date, most studies of food security among American Indian families have been tribe or reservation based studies [9,10,11] or studies of indigenous populations in other countries [12, 13]. However, rates of food insecurity are known to differ between urban and rural areas in the general US population , and ~78% of people who identify as American Indian report living outside of tribal-designated areas, which are predominately rural . Therefore, it is imperative to consider differences that may exist in food insecurity among American Indians in urban and rural settings.
The presence of food insecurity may impact not only the quantity of available food but also diet intake patterns [16,17,18], with some evidence of this relationship in older American Indian children . However, no studies to date have examined the relationship between household food insecurity and dietary intake in American Indian adults or in very young American Indian children, particularly within the same household. We sought to address these important gaps in the literature by evaluating the prevalence of food insecurity among American Indian households from both rural and urban communities and examining the association of food insecurity with diet patterns of both adults and young children (2–5 years) concurrently in these households. These data were collected as part of the Healthy Children Strong Families 2 (HCSF2) randomized controlled trial of a healthy lifestyle intervention for American Indian families nationwide.  We sought to address three main research questions:
What is the prevalence of food insecurity in American Indian households, and how did this differ by urban-rural status?
What are the correlates of food insecurity in American Indian households?
What is the relationship between food insecurity and diet in these households?
Participant recruitment and enrollment
Participants were recruited from four rural and one urban community in the United States as part of the Healthy Children, Strong Families 2 randomized controlled trial, a healthy lifestyle intervention for American Indian families with young children. The primary objective of HCSF2 is to determine the efficacy of a wellness toolkit in preventing and reducing obesity among American Indian primary caregivers and their children (ages 2–5 years). Senior members of the research team approached communities with whom they had previously worked or where they had close relationships with community members or wellness staff to participate as HCSF2 study sites. Participant inclusion criteria included enrolling a child between the ages of 2 and 5 years and a primary caregiver (e.g., mother, father, grandparent), the ability to travel to the local data collection site for study visits, and a valid mailing address. Exclusion criteria were minimal due to the communities’ value for inclusion in community programs and projects. Caregivers provided written informed consent for both themselves and the participating child, and human subjects approval was granted through the University of Wisconsin Institutional Review Board (protocol 2012–0578) and tribal institutional review boards, when requested by tribal administration. Data reported here were collected during the baseline visit for HCSF2, prior to starting the 2-year intervention.
A self-administered 40-item medical history survey was used to collect information on age, sex, ethnicity, education, household size, income, use of food assistance programs (e.g., WIC, school lunch program), and questions related to chronic disease risk. Adults also provided information on child age, sex, ethnicity, and other demographic factors (e.g., child birthweight). This survey was developed by the study team and has been used previously in this population .
Food insecurity was assessed using two items from the United States Department of Agriculture (USDA) 18-item Household Food Security Survey: “Within the past 12 months we were worried whether our food would run out before we got money to buy more” and “Within the past 12 months the food we bought just didn’t last and we didn’t have money to get more”. An affirmative answer to either of these two questions indicates food insecurity with 97% sensitivity and 83% specificity, and the use of these two questions has been validated against the full survey for households with young children . The two-question survey was chosen to minimize participant burden due to the number of measures and time to complete all the questionnaires included in the larger obesity prevention intervention trial. An additional question was added as a proxy measure to assess distance to stores (How far do you go to obtain food?) as an additional variable related to food access, which may impact the ability of a household to obtain adequate food.
A validated diet screener based on the Dietary Screener Questionnaire  used in the National Health and Nutrition Examination Survey (2009–2010) was used for adults, and the validated child dietary screener based on questions contained in the 2010 National Youth Physical Activity and Nutrition Survey (documentation at http://www.cdc.gov/healthyyouth/yrbs/nypans.htm) was used for children. For both screeners, questions asked about intake over the previous 7 days in the following categories: fruit, vegetables, salad, potatoes, fried potatoes, pizza, 100% juice, soda, other sugar sweetened beverages (e.g., lemonade, sweetened tea, fruit punch, Kool-Aid), and milk.
An electronic scale measured weight (Tanita Model BWB-800S, Tanita, Inc., Chicago, IL), which was assessed without shoes and in light clothing to the nearest 0.1 kg. Height was measured with a portable stadiometer to the nearest 0.1 cm (Seca Model 217, Seca, Inc., Hanover, MD). The average of two measurements was used for height and weight. Children’s heights and weights were converted to body mass index (BMI) percentiles , and adult BMI was calculated as kg/m2.
Focus groups were conducted by trained staff at sites that had completed the intervention to expand our understanding of how geography and other social factors affect food insecurity for participating families and to discuss coping strategies employed by families. Focus group participants were recruited by mailed invitation letters from among participants who had completed the HCSF2 intervention, and 5–7 participants were recruited for each session. A topic guide was developed to ensure consistency among focus group facilitators and included questions (e.g., Do people in the community share food when there are others in need?) and follow-up probes (e.g., How does that work?). Topics included food access, food sharing practices, use of food assistance, and other strategies for obtaining adequate food. Data were audio recorded and transcribed by a transcription service and were supplemented by research staff notes taken during each session. Major themes were determined by inductive methods by three independent trained research staff.
Descriptive statistics were used to estimate prevalence of food insecurity in our sample overall and by urban and rural status. Differences in household and adult and child characteristics between the urban and rural geographic regions were assessed using Fisher’s exact/chi-square tests and Wilcoxon rank-sum tests for dichotomous, ordinal and nominal categorical, and measurement data, respectively. Predictors of food insecurity were assessed using univariate and multivariate logistic regression models. Predictors included in the multivariate models were ethnicity, caregiver age, educational level, geographic designation (rural vs. urban), number of adults in household (single adult household vs. more than one adult), number of children in the household, work outside the home (yes vs. no), and WIC participation. Factors were included in the multivariate analysis if there was evidence of an association with food insecurity status in the univariate analyses (p ≤ 0.10) or the factors have been shown to be associated with food insecurity status in the literature (e.g. single adult household and number of children in the household). Weight status was not significantly associated with food insecurity status and therefore was not included in the model. Separate models then were run for urban and rural households that additionally included distance traveled to store. This variable was not included in the overall model as it was highly correlated with geographic designation. Daily intake frequencies of food items were calculated from adult and child diet screeners. Intake frequencies between food secure and insecure participants were compared using Wilcoxon rank-sum tests and are summarized using medians and interquartile ranges. For the logistic regression analysis results, odds ratios (OR) and 95% confidence intervals are presented. A significance level of 0.05 was used for all analyses without adjustment for multiplicity of testing. All analyses were conducted using STATA 14 (StataCorp, College Station, TX, USA) and validated using SAS 9.4 (SAS Inc., Cary, NC, USA).
Prevalence of food insecurity
In total, 450 adult-child dyads from five participating communities (n = 240 rural households; n = 210 urban households) were enrolled. Participant demographics are summarized in Table 1. For adults, the average age was 31.5 ± 8.5 years, 95% were female, and 81.3% self-identified as American Indian; for children, average age was 45.0 ± 13.0 months, 50.0% were female, and 86.3% were identified by their caregiver as American Indian. The overall prevalence of food insecurity was 61% and was significantly higher in urban versus rural households at 80% versus 45%, respectively (p < 0.001, Fig. 1). Between food insecure and food secure households, significant differences were observed in education level (p < 0.01), income (p < 0.01), adult age (p < 0.05), and distance traveled to purchase food (p < 0.001).
Factors associated with food insecurity
Using logistic regression analysis, factors associated with food insecurity were assessed (Table 2). In the model that included all households, factors associated with significantly higher odds of food insecurity were adult ethnicity identified as American Indian (p < 0.05), WIC participation (p < 0.05), and urban households (p < 0.001), with a trend toward higher odds for single adult households (p = 0.054). Attainment of a college degree or higher was associated with significantly lower odds of food insecurity (p < 0.01). For rural households, single adult households were associated with significantly higher odds (p < 0.01), while attainment of a college degree or higher and working outside of the home were associated with lower odds of food insecurity (p < 0.05 for both). For urban families, the odds of food insecurity decreased with increasing distance traveled to purchase food (p < 0.05) and increased with an increasing number of children in the household (p < 0.05).
Dietary patterns among food insecure and food secure households
The frequency of daily intake of the following food groups was determined for both the adult and child: fruit, vegetables, salad, potatoes, fried potatoes, pizza, 100% juice, soda, other sugar sweetened beverages (SSBs, e.g., lemonade, sweetened tea, fruit punch, Kool-Aid), sports drinks, and milk (Table 3). Adults from food insecure households had significantly lower vegetable consumption (p < 0.05), and significantly higher intake of fried potatoes (p < 0.001), 100% fruit juice (p = 0.001), and other SSBs (p < 0.05). Children from food insecure households had significantly higher intake of salad (p < 0.01), fried potatoes (p < 0.05), soda (p = 0.01), and sports drinks (p < 0.05).
Dietary patterns in food insecure and secure households were further analyzed by geographic status (urban and rural). Adults in rural food insecure households had lower intake of vegetables and higher intake of 100% fruit juice and SSBs compared to rural food secure households. For children from rural food insecure households, salad was significantly higher than their food secure counterparts. For adults in urban food insecure households, fried potatoes and 100% fruit juice were significantly higher compared to urban food secure households. Fried potatoes were also significantly higher for urban food insecure children compared to urban food secure households. For all food variables, adult and child mean daily intake was significantly correlated (p < 0.05), with two exceptions: adult and child intake of soda and milk was not significantly associated in rural food insecure households (data not shown).
Six focus groups were held (two rural and one urban site) with a total of 31 adults between August 2015 and April 2016. Participants reported coping strategies employed during times of food insecurity, such as use of food assistance programs and relying on family members to supplement meals. Participants reported some intergenerational living or child care arrangements, which blunted some food insecurity through pooled resources but introduced a loss of parental control over some feeding choices. Some geographic differences in coping strategies were noted. For example, urban families with greater access to food outlets reported shopping frequently (every day or every other day), which resulted in spending more on food than planned. Rural families reported infrequent food purchasing trips, which often resulted in the purchase of fewer fresh fruits and vegetables. Rural families also reported using hunting, gathering, and sharing practices (e.g., hunting deer, harvesting wild rice) and individual/community gardens to supplement their diet. Table 4 includes sample comments from urban and rural participants.
An extremely high prevalence of food insecurity was identified among the American Indian households included in this study, and the proportion of households self-reporting food insecurity was significantly different between rural and urban households. These findings are significant as this is the first study of food insecurity to include both urban and rural American Indian families and to examine adults and children concurrently. Our analysis suggested identification as American Indian, urban households, lower educational levels, single adult households, and participation in WIC as factors that are associated with the increased odds for food insecurity. Moreover, differences in dietary intake patterns of both adults and children were identified between food insecure and secure households, suggesting the food insecurity negatively impacts dietary quality for these families. Different coping strategies were reported by rural and urban families that provide context to the quantitative findings.
The prevalence of food insecurity was significantly higher among urban households compared to their rural counterparts, which is of particular importance, as the majority of people who identify as American Indian report living outside of tribal-designated areas . Two previous studies included urban American Indians in their sample, and neither found differences in food security between urban and rural participants. Gundersen examined a national sample of American Indian households (n = 1143) included in the 2001–2004 Core Food Security Module of the Current Population Survey and reported no interaction between food insecurity and geographic designation (i.e., rural or urban) for households with children . The author did suggest these results were counterintuitive, as protective factors are known to exist within rural or reservation-based communities, including increased social capital  and food sharing practices [10, 25]. However, the extent to which these conditions may have contributed to the lower food insecurity in the rural communities in our study is unclear. Jernigan et al. examined food insecurity in a sample of low-income American Indians in California . Of note, their study population was approximately half male and half Hispanic. In comparison, our sample included a full range of incomes, almost all females (~95%), and less than 10% Hispanic participants, and these demographic differences may have contributed to the differences in our findings.
Our analyses did suggest differences between rural and urban households with regard to factors associated with a higher risk of food insecurity. Namely, single adult households, lower educational attainment, and working outside of the home were associated with a high prevalence of food insecurity in rural households, while only the distance traveled to purchase food and the number of children in the household were associated factors in urban households. Our findings align with previous reports suggesting that identification as American Indian , not being employed outside of the home [8, 10], low education  and number of children in the household  are associated with a high prevalence of food insecurity in American Indian communities; findings related to the relationship between food security and participation in food assistance programs for American Indian have been conflicting . As for distance traveled to purchase food, Mullany et al. demonstrated that households with transportation barriers were more likely to be food insecure , which may partially explain why increasing distance traveled to purchase food was associated with lower odds of food insecurity among urban households. In other words, these households may have more resources to travel greater distances to access food at lower cost, such as at Wal-Mart®, rather than relying on convenience stores and small markets where prices are typically much greater and the availability of fresh foods is limited.
Our findings demonstrated significant differences in dietary intake between food secure and insecure households for both American Indian adults and children. Bauer et al. found American Indian children (ages 5–6 years) from a rural reservation who were food insecure consumed more hot or ready-made food from convenience stores, including higher intake of pizza and fried chicken . Adult diet was not considered, and no other studies have examined the relationship between food security status and dietary intake patterns in American Indian families. Moreover, we demonstrated differences among dietary intake for food insecure children compared to food secure children in very young children (2–5 years), which have not been previously demonstrated. These findings may be of clinical significance, as the food groups in which we identified differences in dietary intake patterns are known to contribute to obesity, such as high intake of fruit juice, soda, other SSBs, fried potatoes, and lower intake of vegetables. The finding of significantly increased salad intake among insecure children was unexpected, and we are seeking to better understand how adults are defining salad intake for their children.
Strengths and limitations
This study was strengthened by the inclusion of both urban and rural American Indian households, as the majority of food security studies in American Indian populations to date have included only rural communities or single reservations [8,9,10, 27]. This factor also represents a potential limitation as our data were pooled from multiple, diverse communities. As another strength, our data are contextualized by findings from focus group sessions. For this study, we used only two items of the USDA 18-item Household Food Security Survey, which may have prevented us from capturing more nuanced dimensions of food security and may contribute to differences between our study and existing reports that used different measures . However, these two particular survey items have been validated specifically in households with young children. The time of year when the food insecurity screener is administered may impact the responses, but this potential limitation likely was mitigated in our study as responses were collected over a 2-year period due to staggered enrollment at study sites. All of the survey measures used in the study were self-report, which may be associated with under- or over-reporting.
Many of the communities who participated in this study are currently drawing on traditional culture, strengths, and community resiliency to overcome existing barriers to food security, and we feel it is in alignment with community-based participatory research approaches to address their efforts here. For example, one participating community recently initiated a survey where 73% of respondents viewed hunger as an issue on the reservation . Respondents suggested approaches to address food insecurity, namely, better coordination among programs, greater outreach to children and Elders, more jobs, adoption of a food sovereignty policy by the tribal legislature, and provision of classes (e.g., gardening, harvesting, wild game preparation, canning) and identified existing resources, including community-supported orchards/gardens, food distribution programs, and school-based feeding programs. Another participating rural community supports a strong land reclamation program emphasizing production of traditional foods (e.g., wild rice) in addition to food distribution programs and efforts focused on child and Elder nutrition. For families in the urban community in our study, several resources are provided through the health clinic, such as access to a community garden and food pantry, transportation passes to increase mobility to supermarkets with a broader range of options and prices, and a comprehensive community resource guide (updated monthly). The clinic also provides patient navigation services, including assistance meeting eligibility requirements for food assistance and services specific to American Indian families, such as obtaining a Certificate of Indian Blood and other tribal identification. This identification is needed for access to services like emergency funds provided by some tribes for their citizens living in urban settings, discounts at various Indian-owned businesses, and school-based American Indian-specific programs.
Our data suggest food insecurity among American Indian households was extremely high and was significantly higher in urban households. Moreover, less optimal dietary patterns were identified for food insecure families in both urban and rural settings. Interventions to address food insecurity are urgently needed and must consider multiple factors related to food security, such as barriers that may be unique to families in urban settings (e.g., absence of close-knit community) and access to healthy food (e.g., reliance on small markets where prices are higher).
In addition, development of tribal programs and policies to address food insecurity, food sovereignty, and food access may supplement federal-level food assistance strategies; cultural factors unique to American Indian communities should be considered.
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We gratefully acknowledge all of the families and communities who participated in the Healthy Children Strong Families 2 trial through which these data were collected.
This project was funded by the National Institutes of Health, National Heart, Lung, and Blood Institute [grant number 1RO1HL114912] to AA. KM was supported through the Shapiro Summer Research Program through the University of Wisconsin School of Medicine and Public Health. The funders had no role in the design, analysis, or writing of this article.
Availability of data and materials
The datasets generated and/or analysed during the current study are not publicly available because the larger trial (Healthy Children, Strong Families 2) is still ongoing but are available from the corresponding author on reasonable request.
All authors participated in formulating the research question and designing the study. ET collected, analyzed, and interpreted the data and drafted the manuscript. KM analyzed and interpreted the data and performed the literature review. LC and KMK analyzed and interpreted the data. KC collected data, conducted the focus group sessions, and analyzed data. AY, KMK, and TP provided interpretation of the data and critical review of the manuscript. AA conceived of the study; participated in the design, implementation, and coordination of it; and guided the development of the manuscript. All authors have read and approved the final version of the manuscript.
The authors declare that they have no competing interests.
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Ethics approval and consent to participate
Caregivers provided written informed consent for both themselves and the participating child, and human subjects approval was granted through the University of Wisconsin Institutional Review Board (protocol 2012–0578) and tribal institutional review boards, when requested by tribal administration.
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Tomayko, E.J., Mosso, K.L., Cronin, K.A. et al. Household food insecurity and dietary patterns in rural and urban American Indian families with young children. BMC Public Health 17, 611 (2017). https://0-doi-org.brum.beds.ac.uk/10.1186/s12889-017-4498-y
- American Indian
- Food security
- Early childhood