Jo Ann S. Carson

The Evidence for Dietary Prevention and Treatment of Cardiovascular Disease

During the past few decades numerous studies have reported the atherogenic potential of saturated fatty acids, trans-fatty acids, and cholesterol, and beneficial effects of fiber, phytostanols/phytosterols, n-3 fatty acids, a Mediterranean diet, and other plant-based approaches. The purpose of this article is to provide a comprehensive and systematic review of the evidence associated with key dietary factors and risk of cardiovascular disease-an umbrella term encompassing diseases that affect the heart and blood vessels, including coronary heart disease, coronary artery disease, dyslipidemia, and hypertension-in conjunction with the work of the American Dietetic Association Evidence Analysis Library review on diet and lipids, updated with new evidence from the past 2 years. The criteria used and results cited provide scientific rationale for food and nutrition professionals and other health professionals for counseling patients. Details of these searches are available within the American Dietetic Association Evidence Analysis Library online (http://adaevidencelibrary.com). Potential mechanisms and needs for future research are summarized for each relevant nutrient, food, or food component.

Evaluating Parents and Adult Caregivers as ‘Agents of Change’ for Treating Obese Children – Evidence for Parent Behavior Change Strategies and Research Gaps: A Scientific Statement from the American Heart Association

This scientific statement addresses parents and adult caregivers (PACs) as “agents of change” for obese children, evaluating the strength of evidence that particular parenting strategies can leverage behavior change and reduce positive energy balance in obese youth. The statement has 3 specific aims. The first is to review core behavior change strategies for PACs as used in family-based treatment programs and to provide a resource list. The second is to evaluate the strength of evidence that greater parental “involvement” in treatment is associated with better reductions in child overweight. The third is to identify research gaps and new opportunities for the field. This review yielded limited and inconsistent evidence from randomized controlled clinical trials that greater PAC involvement necessarily is associated with better child outcomes. For example, only 17% of the intervention studies reported differential improvements in child overweight as a function of parental involvement in treatment. On the other hand, greater parental adherence with core behavior change strategies predicted better child weight outcomes after 2 and 5 years in some studies. Thus, the literature lacks conclusive evidence that one particular parenting strategy or approach causally is superior to others in which children have a greater focus in treatment. A number of research gaps were identified, including the assessment of refined parenting phenotypes, cultural tailoring of interventions, examination of family relationships, and incorporation of new technologies. A conceptual model is proposed to stimulate research identifying the determinants of PAC feeding and physical activity parenting practices, the results of which may inform new treatments. The statement addresses the need for innovative research to advance the scope and potency of PAC treatments for childhood obesity.

Recommended Dietary Pattern to Achieve Adherence to the American Heart Association/American College of Cardiology (AHA/ACC) Guidelines: A Scientific Statement From the American Heart Association

In 2013, the American Heart Association and American College of Cardiology published the “Guideline on Lifestyle Management to Reduce Cardiovascular Risk,” which was based on a systematic review originally initiated by the National Heart, Lung, and Blood Institute. The guideline supports the American Heart Association’s 2020 Strategic Impact Goals for cardiovascular health promotion and disease reduction by providing more specific details for adopting evidence-based diet and lifestyle behaviors to achieve those goals. In addition, the 2015–2020 Dietary Guidelines for Americans issued updated evidence relevant to reducing cardiovascular risk and provided additional recommendations for adopting healthy diet and lifestyle approaches. This scientific statement, intended for healthcare providers, summarizes relevant scientific and translational evidence and offers practical tips, tools, and dietary approaches to help patients/clients adapt these guidelines according to their sociocultural, economic, and taste preferences.

The GoodNEWS (Genes, Nutrition, Exercise, Wellness, and Spiritual Growth) Trial: A community-based participatory research (CBPR) trial with African-American church congregations for reducing cardiovascular disease risk factors — recruitment, measurement, and randomization

INTRODUCTION Although cardiovascular diseases (CVD) are the leading cause of death among Americans, significant disparities persist in CVD prevalence, morbidity, and mortality based on race and ethnicity. However, few studies have examined risk factor reduction among the poor and ethnic minorities. METHODS Community-based participatory research (CBPR) study using a cluster randomized design--African-American church congregations are the units of randomization and individuals within the congregations are the units of analysis. Outcome variables include dietary change (Diet History Questionnaire), level of physical activity (7-Day Physical Activity Recall), lipoprotein levels, blood pressure, fasting glucose, and hemoglobin A1c. RESULTS Eighteen (18) church congregations were randomized to either a health maintenance intervention or a control condition. Complete data were obtained on 392 African-American individuals, 18 to 70 years of age, predominantly employed women with more than a high school diploma. Treatment and intervention groups were similar at baseline on saturated fat intake, metabolic equivalent of tasks (METS) per day, and other risk factors for CVD. CONCLUSIONS The GoodNEWS trial successfully recruited and evaluated CVD-related risk among African-American participants using a CBPR approach. Several logistical challenges resulted in extending the recruitment, preliminary training, and measurement periods. The challenges were overcome with the assistance of a local community consultant and a professional event planner. Our experience supports the need for incorporating non-traditional community-based staff into the design and operational plan of CBPR trials.

Enhancing self-efficacy and patient care with cardiovascular nutrition eduction

BACKGROUND Provision of medical education that develops nutrition knowledge and self-efficacy is critical if physicians are to incorporate nutrition in preventive care. We studied the impact of a cardiovascular nutrition module on the knowledge, attitudes, and self-efficacy of fourth-year medical students and the relationship of these attributes to patient care practices. METHODS Based on national practice guidelines and learner needs, an educational intervention consisting of two web-based cases, pocket reference cards, and classroom discussion was developed and implemented. Knowledge, attitudes, and self-efficacy were measured at the beginning and end of the 4-week ambulatory care rotation for 40 control and 156 experimental students. Performance in patient care was approximated using a self-report; chart audits were performed for a subset of students. CONCLUSIONS Knowledge scores of experimental students increased significantly from a mean of 10.3 to 14.4 (p<0.001), while the change for control students from 9.2 to 9.8 was not significant (p=0.20). The increase in self-efficacy scores from 26.2 to 35.7 in the experimental group (p<0.001) was twice that of the increase from 25.8 to 29.9 in the control group (p=0.001). Small but significant increases in attitude scores were similar for both groups. Limited data on student performance revealed that students with greater cardiovascular nutrition self-efficacy were more likely to address nutrition with cardiovascular patients. CONCLUSIONS Incorporation of cardiovascular nutrition concepts in an ambulatory care rotation including use of computer-based cases improved student knowledge and self-efficacy, which may translate to increased frequency of future physicians addressing nutrition with patients.

Food-intake patterns assessed by using front-of-pack labeling program criteria associated with better diet quality and lower cardiometabolic risk

BACKGROUND Front-of-pack labeling systems may provide additional guidance to that already available to facilitate the identification of foods that improve diet quality. OBJECTIVE We examined the association between choosing foods that meet criteria of an established front-of-pack labeling system with food-group and nutrient intakes and cardiometabolic risk factors. DESIGN The association between the consumption of foods that met 2014 American Heart Association (AHA) Heart-Check Food Certification Program criteria and 2005 Healthy Eating Index (HEI-2005) scores, food-group intake, energy intake, nutrient intake, and cardiometabolic risk factors was analyzed in 11,296 men and women ≥ 19 y old by using 1-d dietary recall data from the NHANES 2007-2010. Individuals were categorized into consumers and nonconsumers of AHA Heart-Check Food Certification Program-certifiable foods and quartiles of intakes on the basis of the percentage of calories. RESULTS The consumption of AHA Heart-Check Food Certification Program-certifiable foods was positively associated with HEI-2005 scores and fruit, vegetable, whole-grain, total sugar, fiber, potassium, calcium, and vitamin D intakes and inversely associated with the percentage of energy from saturated fat, monounsaturated fat, added sugars, alcohol, and intakes of cholesterol and sodium. The highest quartile of daily energy intake from AHA Heart-Check Food Certification Program-certifiable foods was associated with lower risk of obesity (26%), lower risk of elevated waist circumference (29%), and lower risk of metabolic syndrome (24%) than with lowest intakes (all P < 0.05). CONCLUSION The choice of foods meeting one front-of-pack labeling system positively influences food-group and nutrient intakes and is associated with a higher diet quality and lower risk of cardiometabolic syndrome.

Smart Shoppers Tours: Outcome Evaluation

Abstract Smart Shoppers Tours were offered to mothers on limited incomes in southeast Dallas in 1995–96. Based on focus group data and the Food Guide Pyramid, the series of three tours was designed to increase the purchase of healthy foods by mothers on limited incomes. Based on the Theory of Planned Behavior and Self-Efficacy Theory, the strategies addressed attitudes, self-efficacy, and knowledge in peer-led tours to foster an intent to purchase healthier foods leading to improved food purchasing behaviors, including use of the nutrition label and unit price. The objective of the outcome evaluation was to measure changes in each construct mentioned above. A questionnaire measuring each of these aspects was administered at ticket issuance and approximately 2 months later. Pre-tour data are available on 557 individuals, 242 of whom attended tours; post-tour data are available on 114. When pre- and post-tour data were compared, knowledge and skill increased, attitudes regarding purchasing healthy foods on a limited income improved, and intent to purchase healthy foods increased. Self-reports and a home food inventory suggest improved food purchasing. Based on structural modeling, a path model that resembles but is not identical to the Theory of Planned Behavior and Self-Efficacy Theory is suggested.

Food-and-beverage environment and procurement policies for healthier work environments.

The importance of creating healthier work environments by providing healthy foods and beverages in worksite cafeterias, in on-site vending machines, and at meetings and conferences is drawing increasing attention. Large employers, federal and state governments, and hospital systems are significant purchasers and providers of food and beverages. The American Heart Association, federal government, and other organizations have created procurement standards to guide healthy purchasing by these entities. There is a need to review how procurement standards are currently implemented, to identify important minimum criteria for evaluating health and purchasing outcomes, and to recognize significant barriers and challenges to implementation, along with success stories. The purpose of this policy paper is to describe the role of food-and-beverage environment and procurement policy standards in creating healthier worksite environments; to review recently created national model standards; to identify elements across the standards that are important to consider for incorporation into policies; and to delineate issues to address as standards are implemented across the country.

The Cardiovascular Health of Urban African Americans: Diet-Related Results from the Genes, Nutrition, Exercise, Wellness, and Spiritual Growth (GoodNEWS) Trial

African Americans have a higher incidence of cardiovascular disease (CVD) than Americans in general and are thus prime targets for efforts to reduce CVD risk. Dietary intake data were obtained from African Americans participating in the Genes, Nutrition, Exercise, Wellness, and Spiritual Growth (GoodNEWS) Trial. The 286 women and 75 men who participated had a mean age of 49 years; 53% had hypertension, 65% had dyslipidemia, and 51% met criteria for metabolic syndrome. Their dietary intakes were compared with American Heart Association and National Heart, Lung, and Blood Institute nutrition parameters to identify areas for improvement to reduce CVD risk in this group of urban church members in Dallas, TX. Results from administration of the Dietary History Questionnaire indicated median daily intakes of 33.6% of energy from total fat, 10.3% of energy from saturated fat, 171 mg cholesterol, 16.3 g dietary fiber, and 2,453 mg sodium. A beneficial median intake of 2.9 cups fruits and vegetables per day was coupled with only 2.7 oz fish/week and an excessive intake of 13 tsp added sugar/day. These data indicate several changes needed to bring the diets of these individuals--and likely many other urban African Americans--in line with national recommendations, including reduction of saturated fat, sodium, and sugar intake, in addition to increased intake of fatty fish and whole grains. The frequent inclusion of vegetables should be encouraged in ways that promote achievement of recommended intakes of energy, fat, fiber, and sodium.

The Effectiveness of Medical Nutrition Therapy Delivered by Registered Dietitians for Disorders of Lipid Metabolism: A Call for Further Research

Cardiovascular disease is the leading cause of death in the United States. Approximately 80% of patients with coronary heart disease have at least one of the four major risk factors— hypertension, dyslipidemia, diabetes, and smoking—that can be modified through lifestyle changes (1,2). Trained in biological and food science as well as nutrition counseling and behavioral skills management, registered dietitians (RDs) are uniquely qualified to tailor help for these patients to effectively modify their diets and reduce their risk for cardiovascular disease. The evidence that supports the effectiveness of this approach and what data are needed to further establish medical nutrition therapy for managing disorders of lipid metabolism and potentially prevention of cardiovascular disease is discussed in this commentary.