Browsing by Author "Tussing-Humphreys, Lisa M."

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    Food and beverage choices contributing to dietary guidelines adherence in the Lower Mississippi Delta
    Thomson, J. L.; Onufrak, S. J.; Connell, C. L.; Zoellner, Jamie M.; Tussing-Humphreys, Lisa M.; Bogle, M. L.; Yadrick, K. (Cambridge University Press, 2011-12)
    Objectives: The objectives of the present study were to evaluate diet quality among Lower Mississippi Delta (LMD) residents using the Healthy Eating Index-2005 (HEI-2005) and to identify the top five dietary sources contributing to HEI-2005 components. Demographic differences in HEI-2005 scores were also explored. Design: Diet quality was evaluated using HEI-2005. Demographic differences in HEI-2005 scores were investigated using multivariable regression models adjusting for multiple comparisons. The top five dietary sources contributing to HEI-2005 components were identified by estimating and ranking mean MyPyramid equivalents overall and by demographic characteristics. Setting: Dietary data, based on a single 24 h recall, from the Foods of Our Delta Study 2000 (FOODS 2000) were used in the analyses. Subjects: FOODS 2000 adult participants 18 years of age or older. Results: Younger age was the largest determinant of low diet quality in the LMD with HEI-2005 total and seven component scores declining with decreasing age. Income was not a significant factor for HEI-2005 total or component scores. The top five dietary sources differed by all five of the demographic variables, particularly for total vegetables and energy from solid fats, alcoholic beverages and added sugars (SoFAAS). Soft drinks were the leading source of SoFAAS energy intake for all demographic groups. Conclusions: The assessment of diet quality and identification of top dietary sources revealed the presence of demographic differences for selected HEI-2005 components. These findings allow identification of food patterns and culturally appropriate messaging and highlight the difficulties of treating this region as a homogeneous population.
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    Moderators of intervention dose effects on diet quality and physical activity changes in a church-based, multicomponent, lifestyle study: Delta Body and Soul III
    Thomson, J. L.; Zoellner, Jamie M.; Tussing-Humphreys, Lisa M.; Goodman, Melissa H. (2016-06)
    Many community-based lifestyle interventions targeting African Americans have reported positive effects on participants' dietary choices and physical activity habits. However, these effects vary and not all participants will have outcome changes. Moderation analysis can help explain differential effects observed, but are not often reported. Hence, the objective of this secondary analysis was to explore potential moderators of intervention dose effects on diet quality and physical activity outcomes in an effective lifestyle intervention. Delta Body and Soul III, conducted from 2011 to 2012, was a 6-month, church-based, multicomponent, educational intervention designed to improve diet quality and increase physical activity in rural Southern African American adults. Generalized linear mixed models were used to determine associations among indicators of intervention dose received by participants, potential moderators and health outcome changes. Results indicated only three baseline characteristics-employment status, food shopping frequency and individual with primary responsibility for meal preparation-moderated the effects of education session attendance on diet quality changes. No evidence for moderation of exercise class attendance effects on physical activity changes was found. Thus, this culturally targeted, multicomponent lifestyle intervention did induce positive health changes in participants with a range of sociodemographic characteristics and food shopping and eating behaviors.
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    Psychosocial constructs were not mediators of intervention effects for dietary and physical activity outcomes in a church-based lifestyle intervention: Delta Body and Soul III
    Thomson, Jessica L.; Tussing-Humphreys, Lisa M.; Zoellner, Jamie M.; Goodman, Melissa H. (2016-08)
    Objective: Evaluating an intervention's theoretical basis can inform design modifications to produce more effective interventions. Hence the present study's purpose was to determine if effects from a multicomponent lifestyle intervention were mediated by changes in the psychosocial constructs decisional balance, self-efficacy and social support. Design: Delta Body and Soul III, conducted from August 2011 to May 2012, was a 6-month, church-based, lifestyle intervention designed to improve diet quality and increase physical activity. Primary outcomes, diet quality and aerobic and strength/flexibility physical activity, as well as psychosocial constructs, were assessed via self-report, interviewer-administered surveys at baseline and post intervention. Mediation analyses were conducted using ordinary least squares (continuous outcomes) and maximum likelihood logistic (dichotomous outcomes) regression path analysis. Setting: Churches (five intervention and three control) were recruited from four counties in the Lower Mississippi Delta region of the USA. Subjects: Rural, Southern, primarily African-American adults (n 321). Results: Based upon results from the multiple mediation models, there was no evidence that treatment (intervention v. control) indirectly influenced changes in diet quality or physical activity through its effects on decisional balance, self-efficacy and social support. However, there was evidence for direct effects of social support for exercise on physical activity and of self-efficacy for sugar-sweetened beverages on diet quality. Conclusions: Results do not support the hypothesis that the psychosocial constructs decisional balance, self-efficacy and social support were the theoretical mechanisms by which the Delta Body and Soul III intervention influenced changes in diet quality and physical activity.