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Effectiveness of Nutrition Intervention : Systematic Review & Meta-Analysis
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Hae Young Lee, Hyun Ah Kim, Il Sun Yang, Chung Mo Nam, Eun Cheol Park
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Korean J Community Nutr 2004;9(1):81-89. Published online February 29, 2004
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 Abstract
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- A systematic review and meta-analysis of the literatures was conducted to evaluate the effectiveness of nutrition intervention by dietitian. The 31 studies that were all randomized controlled trials, were identified from computerized search of published researches on MEDLINE, Embase database until January, 2003 and review of reference lists. The main search terms were the combination "dietitian", "dietary intervention", "nutrition intervention" or "nutritional intervention" and "effectiveness". The subgroup analysis was performed by the publication year, quality score, type of disease, content of intervention, intervention provider, type of intervention (nutritional counseling and education/nutrition counseling and education + diet modification), method of intervention (individual/group/individual + group) and follow-up period. Two reviewers independently selected trials for inclusion, assessed the quality and extracted the data. The meta-analysis of 31 studies based on the random effect model showed that the medical nutrition therapy was significantly effective in treating the diseases (effect size 0.1715 ; 95% confidence interval 0.0938 - 0.2491). This study showed the clear evidence of the effectiveness of nutrition intervention through the meta-analysis. So the nutrition intervention by dietitian should be recommended and recognized as the effective therapy of treating the diseases. Also the nutrition intervention should be conducted regularly to maintain the effectiveness of the nutrition intervention. The nutrition intervention was significantly effective in treating the diseases on the random effect model (effect size :0.1715 ; 95% confidence interval 0.0938 - 0.2491).
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A Review of the Medical Nutrition Therapy (MNT) of the U.S. Medicare System
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Eun Cheol Park, Hyun Ah Kim, Hae Young Lee, Young Eun Lee, Il Sun Yang
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Korean J Community Nutr 2002;7(6):852-862. Published online December 31, 2002
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Abstract
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- The purposes of this study were 1) to review the Medical Nutrition Therapy (MNT) Act of the United States, 2) to introduce the efforts of the American Dietetic Association (ADA) to expand the Medicare coverage for MNT and 3) to provide information about the reimbursement under Medicare Part B for the cost of MNT. The MNT Act defined MNT services as "the nutritional diagnostic, therapeutic, and counseling services provided by a Registered Dietitian or nutritional professional for the purpose of managing diabetes or renal diseases". Also, the MNT Act defined "conditions for coverage of MNT", "limitations on coverage of MNT", and "qualifications of MNT service provider". To expand the coverage of Medicare to include MNT, the ADA realized the need for development of a protocol for MNT, as well as studies to evaluate the effectiveness and cost-effectiveness of the MNT protocol developed. Therfore, the ADA supported the studies to develop a strong database of scientific investigations of nutritional services. Furthermore, the ADA needed credible data that could be used by policy makers, so the ADA contracted with the Lewin Group to carry out the study to gather the additional data needed to strengthen the ADA's position. In the report of the Lewin Group, which was entitled, "The Cost of Covering Medical Nutrition Therapy under Medicare: 1998 through 2004", it was concluded, that if coverage for MNT in the Part B portion of Medicare had begun in 1998, by 2004, approximately $ 2.3 billion would have been saved through reduced hospital spending under Part A of Medicare ($ 1.2 billion) and reduced physician visits under Part B ($ 1.1 billion). Effective January 1 2002, the US Congress extended Medicare coverage to include MNT to beneficiaries with diabetes or renal diseases. The Centers for Medicare and Medicaid Services (CMS) established the duration and frequency for the MNT based on published reports or generally accepted protocols (for example, protocols suggested by the ADA). The number of hours covered by Medicare is 3 hours for the initial MNT and 2 hours for a follow-up MNT. In 2002, a Medicare coverage policy was made to define the Physician's Current Procedural Terminology (CPT) codes 97802, 97803, and 97804 for MNT.
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