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Context Oxidative balance score (OBS) is a composite measure of multiple pro- and antioxidant exposures. Objective To investigate associations of OBS with F2-isoprostanes (FIP), mitochondrial DNA copy number (mtDNA), and fluorescent oxidative products (FOP), and assess inter-relationships among the biomarkers. Methods In a cross-sectional study, associations of a thirteen-component OBS with biomarker levels were assessed using multivariable regression models. Results Association of OBS with FIP, but not with FOP, was in the hypothesized direction. The results for mtDNA were unstable and analysis-dependent. The three biomarkers were not inter-correlated. Conclusions Different biomarkers of oxidative stress may reflect different biological processes.

Background:Limited research has been done on the compliance and acceptability of maintaining pedometer diaries for an extensive time frame in community-based interventions targeting minority populations. Methods: Community "coaches" led participants in a 6-month community-based walking intervention that included wearing pedometers and maintaining pedometer diaries for the study duration. Descriptive statistics and ANOVA tests were used to evaluate compliance rates for maintaining diaries and daily step counts. After the intervention, focus groups were used to explore opinions regarding pedometers. Audiotapes were transcribed and evaluated using systematic content analysis. Results: The 8 coaches and 75 enrolled walking participants were primarily African American (98%) women (94%). Overall, the group (N = 83) submitted 85% of all possible pedometer diaries and recorded 73% of all possible daily step counts. Walkinggroup members were significantly (P < .01) more compliant if their coach was also compliant. Identified benefits of wearing pedometers and maintaining diaries outnumbered the barriers. Participants were enthusiastic about wearing the pedometers and indicated that the weekly diaries provided a source of motivation. Conclusions: This research suggests pedometer diaries are a viable intervention tool and research method for community-based physical activity interventions targeting Afri-Zoellner, Avis-Williams, and Yadrick are with the Dept of Nutrition and Food Systems, University of Southern Mississippi, Hattiesburg, MS. Powers is with the can Americans and highlights the need for social support to promote pedometer diary compliance.

Hypertension is a risk factor for several vascular diseases. Evidence suggests that oxidative stress (OS) plays a significant role in its pathophysiology. Human studies have shown inconsistent results, varying based on the OS biomarker and study population. In a racially diverse population, examine the association between: (1) blood pressure or hypertension and four markers of OS and (2) blood pressure or hypertension and oxidative balance score (OBS). Using data (n = 317) from the cross-sectional study on race, stress, and hypertension, an OBS was constructed from various measures of pro-oxidant and antioxidant exposures. OS was assessed by four biomarkers: fluorescence oxidative products, F2-isoprostanes, mitochondrial DNA copy number, and gamma tocopherol. Multivariate linear and logistic regression analyses were used to estimate the associations of interest. None of the adjusted associations between hypertension and OS markers was statistically significant. OBS was inversely associated with hypertension after adjusting for study covariates. Persons with higher OBS have lower odds of having hypertension; however, the evidence on the relationship between OS markers and blood pressure remains unconvincing.

This paper examines the effect that Walmart Supercenters, which lower food prices and expand food availability, have on food insecurity. Data come from the 2001-2012 Current Population Survey Food Security Supplements matched to Walmart Supercenter entry dates and locations. Using instrumental variables models that leverage Walmart's predictable expansion pattern outward from corporate headquarters, we find that closer proximity to a Walmart Supercenter improves household and child food security, as measured by affirmative responses to a food insecurity questionnaire and an indicator for food insecurity. The effects are largest among lowincome households and children but are also sizeable for middle-income children.

This study examined the perceptions of community members' engaged in community-academia partnerships involved in developing nutrition interventions in three communities in the Lower Mississippi Delta. Perceptions on effectiveness of the partnerships were investigated. Six focus group interviews were conducted, with 33 participants that included 27 females and 6 males. The data were analyzed by content coding. Emerging themes were identified and related to accomplishments, barriers to success, and factors related to success of the partnerships. Accomplishments included the establishment of active committees, positive changes in health behavior related to food choices, and participation in community events. Barriers to success included the slow pace of intervention implementation, difficulties with understanding the role of the community in the participatory research process, the decision-making processes, and project name recognition. Factors related to success were tangible benefits to the community, participation that was representative, simplification of the research process, and the decision-making processes.

Directly involving community members in identifying health problems and solutions results in the development of interventions that are likely to have greater acceptability with the community.

Residing in HIV-affected households is associated with stunting in children under 5 years of age.