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Dietetic guidelines on food and nutrition in the secondary prevention of cardiovascular disease - evidence from systematic reviews of randomized controlled trials (second update, January 2006).

AIM: To update dietetic guidelines based on systematic review evidence on dietary advice to prevent further events in people with existing cardiovascular disease (CVD) (secondary prevention). METHODS: The Cochrane Library, MEDLINE and EMBASE were comprehensively searched to January 2005 for systematic reviews on aspects of diet and heart health. Reviews were included if they searched systematically for randomized controlled trials relating to diet and secondary prevention of CVD. Each review was critically appraised by at least two members of the UK Heart Health and Thoracic Dietitians Group. The quality and results of each review were discussed and summarized at a group meeting. RESULTS: Evidence-based strategies that reduce cardiovascular events in those with CVD include reduction in saturated fat and substitution with unsaturated fats. Individuals who have suffered a myocardial infarction may also benefit from adopting a Mediterranean type diet and increasing intake of omega 3 fats, but it is not clear whether they are beneficial for all patients with CVD. There is no systematic review evidence to support the use of antioxidant vitamins supplements, low glycaemic index diets, or homocysteine lowering therapies in this group. CONCLUSION: There remains good evidence that reducing saturated fat reduces morbidity in patients with CVD. This advice is consistent for most manifestations of CVD, with the addition of Mediterranean dietary advice and increased omega 3 fats for those who have had a myocardial infarction.

Antioxidants↗

Position of the American Dietetic Association: phytochemicals and functional foods.

Never before has the focus on the health benefits of commonly available foods been so strong. The philosophy that food can be health promoting beyond its nutritional value is gaining acceptance within the public arena and among the scientific community as mounting research links diet/food components to disease prevention and treatment. Dietitians are uniquely qualified and positioned to translate the available sound scientific evidence into practical dietary applications for the consumer and to provide the food industry and the government with valuable insight and expertise for future research, product development, and regulation of phytochemicals and functional foods. Increasing the availability of healthful foods, including functional foods, in the American diet is critical to ensuring a healthier population. As the nutrition experts, dietetics professionals must be the leaders in this new, exciting, and meaningful field as it evolves.

Diet↗

Position of the American Dietetic Association: child and adolescent food and nutrition programs.

It is the position of the American Dietetic Association that all children and adolescents, regardless of age, sex, socioeconomic status, racial diversity, ethnic diversity, linguistic diversity, or health status, should have access to food and nutrition programs that ensure the availability of a safe and adequate food supply that promotes optimal physical, cognitive, social, and emotional growth and development. Appropriate food and nutrition programs include food assistance and meal programs, nutrition education initiatives, and nutrition screening and assessment followed by appropriate nutrition intervention and anticipatory guidance to promote optimal nutrition status. Food and nutrition programs create a safety net that ensures that children and adolescents at risk for poor nutritional intakes have access to a safe, adequate, and nutritious food supply and nutrition screening, assessment, and intervention. It is important that continued funding be provided for these programs, which consistently have been shown to have a positive impact on child and adolescent health and well-being. Food and nutrition programs serve as a means to prevent or reduce hunger and food insecurity, but also as a vehicle for nutrition education and promotion of physical activity designed to prevent or reduce overweight and prevent chronic disease. It is the role of the registered dietitian to support adequate and sustained funding for food and nutrition programs, universal health care reimbursement for nutrition services, and the use of research and surveillance programs to evaluate and improve these programs. In addition, the registered dietitian and dietetic technician, registered, are responsible for serving as a nutrition resource to all groups and individuals providing services to children and adolescents, acting as an advocate for the establishment of child-care, school, and community settings conducive to the development of good nutrition habits.

Adolescent↗

Public('s) nutrition.

OBJECTIVE: To promote the new field of 'public nutrition' as a means to address, in a more efficient, sustainable and ethical manner, the world-wide epidemic of malnutrition--undernutrition and specific nutrient deficiencies, and also obesity and other nutrition-related chronic diseases. STRATEGY: Grounded in the health promotion model, public nutrition applies the population health strategy to the resolution of nutrition problems. It encompasses 'public health nutrition', 'community nutrition' and 'international nutrition' and extends beyond them. It fits within the conceptual framework of 'the new nutrition science' and is an expression of this reformulated science in practice. Its fundamental goal is to fulfil the human right to adequate food and nutrition. It is in the interest of the public, it involves the participation of the public and it calls for partnerships with other relevant sectors beyond health. Public nutrition takes a broader view of nutritional health, addressing the three interrelated determinant categories of food systems and food security; food and health practices; and health systems. It assesses and analyses how these influence the immediate determinants that are dietary intake and health status so as to direct action towards effective progress. To further enhance the relevance and effectiveness of action, public nutrition advocates improved linkages between policies and programmes, research and training. A renewed breed of professionals for dietetics and nutrition, trained along those lines, is suggested. CONCLUSION: There is a critical need to develop new knowledge, approaches and skills to meet the pressing nutrition challenges of our times.

Global Health↗

Communicating and judging the quality of qualitative research: the need for a new language.

BACKGROUND: Traditionally UK dietitians have tended to take a more quantitative approach to research. Qualitative research which gives an in-depth view of people's experiences and beliefs is also now being used to help answer some important dietetic research questions. REVIEW: A review of the limited number of qualitative research papers in the Journal of Human Nutrition and Dietetics 1990-2002 (nine papers in all), revealed a lack of specific discussion of the quality strategies commonly used in qualitative research. This could indicate a less than robust approach, but might also reflect a different perspective on quality, or simply the difficulties associated with disseminating qualitative research to a profession whose members lack familiarity with the language. The fact that qualitative research seems to be used rarely may also indicate a poor understanding of its role. PURPOSE OF THIS PAPER: This paper seeks to clarify the potential role of qualitative research and draws on previously published guidelines for demonstrating quality. It is hoped that this will offer dietitians a framework for carrying out qualitative research and a language for reporting it, as well acting as a stimulus for discussion.

Communication↗

Eating disorders: current nutrition therapy and perceived needs in dietetics education and research.

OBJECTIVE: Research was conducted to obtain a profile of nutrition therapy currently in practice for patients with anorexia nervosa, bulimia nervosa, and anorexia/bulimia (mixed diagnosis) and to identify the areas of dietetics education and research regarding eating disorders that need more attention. DESIGN: A cross-sectional correlational survey was conducted by mailing a questionnaire composed of open- and closed-ended questions to US dietitians who work with patients who have eating disorders. SAMPLE: Of 199 dietitians selected from a list of 495 representing all geographic areas of the United States, 117 responded. The list was obtained from a national referral network for eating disorders. STATISTICAL ANALYSIS: chi 2 Analysis was completed on all closed-ended answers. Pearson's correlation coefficient with a value of P < .05 was considered significant. RESULTS: Nutrition therapy administered varied among dietitians treating inpatients, outpatients, and both. Three community groups were identified as most important to reach for prevention of eating disorders: junior high school students, coaches, and parents. Crucial areas of research were perceived by 94 dietitians to be comparative effectiveness of techniques of medical nutrition therapy (n = 55) and of techniques of prevention (n = 26) and increased understanding of etiology in relation to identification of high-risk groups and prevention (n = 21). Dietitians desired further information on multiple topics related to eating disorders. APPLICATION: Medical nutrition therapy for eating disorders is a specialization that requires education and training beyond the minimum required for dietetic registration. Some of the techniques required are unique to this specialization due, in part, to the psychological nature of the disorders. All dietitians, however, must be able to recognize and refer patients with eating disorders; these skills must be included in basic undergraduate programs and internships. This study supports the need for more research concerning the outcomes of nutrition therapy and the effectiveness of prevention programs.

Anorexia Nervosa↗

[The teaching of nutrition at medical schools:current situation].

BACKGROUND: Although doctors, students and teachers all coincide in acknowledging the need for an appropriate knowledge of human nutrition in order to practice medicine, the inclusion of this discipline in the undergraduate curriculum has been rather scant. Until a few years ago, there were only two medical schools in Spain with a compulsory course in nutrition as part of the syllabus. GOAL: An attempt will be made to assess the current status of the teaching of nutrition within the syllabuses for a degree in Medicine and Surgery at Spanish universities. MATERIALS: The syllabuses of 27 Faculties of Medicine in Spain have been consulted to find out: 1) if there are specific subjects on nutrition, feeding and/or dietetics, 2) if these subjects are compulsory or optional, and 3) if there are specific issues from this area included within other subjects. RESULTS: The results of the query show that 7 schools (approximately 25% of the total) teach a compulsory subject on nutrition or dietetics whereas 17 have at least one optional subject in this field, particularly during the second or specialization stage, with a mean content worth 4.5 credits. Furthermore, 3 of the schools offer both compulsory and optional courses simultaneously. Within the course material of the core subjects included in the second stage of the degree, the subjects of Endocrinology, Metabolism and Paediatrics seem to be the ones most commonly including clinical nutrition topics, generally with a very small relative weight. CONCLUSIONS: The results obtained show an increasing interest in the creation of distinctive subjects for nutrition and/or dietetics. Nonetheless, this is still mainly an optional subject and the integration of human nutrition into the syllabus for core subjects seems insufficient for its to be considered a good alternative.

Curriculum↗

Assessing the dietetic needs of different patient groups receiving enteral tube feeding in primary care.

AIM: To examine the nature of all contacts between adult tube-fed patients and the dietetic service and to refine the current dietetic protocols to reflect the findings of the study with a view to improving patient care. METHODS: All adult patients referred to the Community Nutrition and Dietetic Service within a 6-month period were included in the study. Using a proforma developed from a retrospective case-note analysis, data were collected on the complications that prompted more frequent contacts than the department protocol. Data were analysed using the Statistical Package for the Social Sciences. RESULTS: The most common indication for home enteral feeding in this group of adult patients was a swallowing disorder resulting from a cerebrovascular accident (59.5%) followed by cancer (21.5%). There was a trend for cancer patients to need more intervention compared with those patients with other medical conditions. A significant difference was observed in the total contacts and telephone calls given to those patients in there own homes (P=0.019) and there was a trend towards more domicilary visits with this group. CONCLUSIONS: The department protocols have been revised to include a planned review within 2-6 weeks of initial dietetic assessment in the community for those patients who were identified to have the greatest need. More intensive dietetic monitoring has clear implications for dietetic services in the community.

Adolescent↗

Position of the American Dietetic Association: domestic food and nutrition security.

In 2000, over 10% of United States (US) households, including more than 33 million people, experienced food insecurity. Food insecurity negatively affects the dietary intake and nutritional status of adults leading to poor health and increased risk for the development of chronic diseases. Food insecurity also negatively affects children's health, psychological and cognitive functioning, and their academic achievement. It is the position of the American Dietetic Association that systematic and sustained action is needed to bring an end to domestic food insecurity and hunger and to achieve food and nutrition security for all in the US. Immediate and long-range interventions, including adequate funding for and increased utilization of food and nutrition assistance programs, the inclusion of food and nutrition education in all programs providing food and nutrition assistance, and innovative programs to promote and support the economic self-sufficiency of individuals and families, are key to ending domestic food insecurity. Dietetics professionals can play a key role in ending food insecurity not only through competent and collaborative practice, but also through advocacy efforts at the local, state, regional, and national levels.

Dietetics↗

Dietetics training for American Indians and Alaskan natives.

The response to training has been enthusiastic. Even in these times of limited funds, applications to attend training exceed the available space. From the first class in October 1968 through September 1982, nearly 1,300 Indian and Alaskan native hospital food service employees and employees representing tribal programs throughout the country have received training from the courses and workshops provided by the Nutrition and Dietetics Training Program. With the increasing involvement of Native Americans in their own health care programs, the need for training in foods and nutrition will continue.

Alaska↗

Enteral nutrition after bone marrow transplantation.

Nutritional insult after bone marrow transplantation (BMT) is complex and its nutritional management challenging. Enteral nutrition is cheaper and easier to provide than parenteral nutrition, but its tolerance and effectiveness in reversing nutritional depletion after BMT is poorly defined. Nutritional status, wellbeing, and nutritional biochemistry were prospectively assessed in 21 children (mean age 7.5 years; 14 boys) who received nasogastric feeding after BMT (mean duration 17 days) and in eight children (mean age 8 years, four boys) who refused enteral nutrition and who received dietetic advice only. Enteral nutrition was stopped prematurely in eight patients. Greater changes in weight and mid upper arm circumference were observed in the enteral nutrition group, while positive correlations were found between the duration of feeds and increase in weight and in mid upper arm circumference. Vomiting and diarrhoea had a similar incidence in the two groups, while fever and positive blood cultures occurred more frequently in the dietetic advice group. Diarrhoea occurring during enteral nutrition was not associated with fat malabsorption, while carbohydrate malabsorption was associated with rotavirus infection only. Enteral feeding did not, however, affect bone marrow recovery, hospital stay, general wellbeing, or serum albumin concentrations. Hypomagnesaemia, hypophosphataemia, zinc and selenium deficiency were common in both groups. In conclusion, enteral nutrition, when tolerated, is effective in limiting nutritional insult after BMT. With existing regimens nutritional biochemistry should be closely monitored in order to provide supplements when required.

Body Weight↗