1 edition of Application of systematic review methodology to the field of nutrition found in the catalog.
Application of systematic review methodology to the field of nutrition
Alice H. Lichtenstein
2009 by U.S. Dept. of Health and Human Services, Agency For Healthcare Research and Quality in Rockville, MD .
Written in English
|Other titles||Advancing the role of systematic reviews in nutrition research and applications|
|Statement||prepared for Agency for Healthcare Research and Quality, U.S. Department of Health and Human Services ; prepared by Tufts Evidence-based Practice Center ; investigators, Alice H. Lichtenstein, Elizabeth A. Yetley, Joseph Lau|
|Series||Nutritional research series -- v. 1, Technical review -- no, 17, AHRQ publication -- no. 09-0026-1|
|Contributions||Yetley, Elizabeth A., Lau, Joseph, United States. Agency for Healthcare Research and Quality, Tufts Evidence-based Practice Center|
|LC Classifications||R853.S94 L53 2009|
|The Physical Object|
|Pagination||viii, 27 p. :|
|Number of Pages||27|
|LC Control Number||2009358639|
I focus on the methodology and look to my colleagues for their nutrition expertise," says Lau, also a professor at Tufts University School of Medicine. For example, in our review on interventions for preventing preterm birth [ 6 ], we restricted the inclusion criteria to reviews of randomized controlled trials. Consultation with other Federal experts occurs throughout the policy development process. Share this:. In areas where WHO standard definitions exist like undernutrition, reviews have used standard WHO definitions [ 40 - 42 ], while for some reviews, reviewers have self-defined the outcome for standardization [ 4344 ].
Some epidemiologists prefer to think of confounding separately from common categorizations of bias since, unlike selection and information bias, confounding stems from real causal effects. For example, in our review on interventions for preventing preterm birth [ 6 ], we restricted the inclusion criteria to reviews of randomized controlled trials. Quality Assessment of Reviews The quality and strength of evidence presented in the individual, included reviews should influence the conclusions drawn in the systematic review of these. Correlation, or at least association between two variables, is a necessary but not sufficient criterion for inference that one variable causes the other.
The literature search can also be complemented by contacting experts in the topic under review and by checking articles which cite individual studies that are known to be relevant to the topic. Emphasis is placed on topics with the strongest evidence or public health need, indicating a low likelihood that new or additional evidence would greatly change the recommendation. A setting-based approach can be an important intermediate for this, if it is applied to institutions where children of low-income families are nursed and educated. Prospective demographic surveillance requires lots of manpower and is difficult to implement in a spread-out population. This task requires the forward-looking ability of modern risk management approaches that transform health risk factors, incidence, prevalence and mortality statistics derived from epidemiological analysis into management metrics that not only guide how a health system responds to current population health issues, but also how a health system can be managed to better respond to future potential population health issues. Although the researchers will usually have to do this via an assessment of the quality of report, with the hope that initiatives such as PRISMA formerly, QUOROM which assist by facilitating adequate standards of reporting [ 26 ].
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Analysis of the more limited database on livestock products found no evidence of a difference in nutrient content between organically and conventionally produced livestock products.
Topics that are supported by moderate evidence can support recommendations of varying emphasis, including complementing those with a strong evidence base. The analyses were restricted to the most commonly reported nutrients. Food pattern modeling analyses. Cochrane and Campbell are well-positioned to take the lead in improving quality as our analysis also suggests that the quality ratings for the Cochrane reviews were found to be fairly consistent as compared to the non-Cochrane reviews.
The use of systematic reviews for nutrition related topics is more recent. For example, in our review of reviews on fetal fibronectin and transvaginal cervical ultrasound for predicting preterm birth, [ 8 ] we Application of systematic review methodology to the field of nutrition book reviews that had incorporated studies among women who were both symptomatic and asymptomatic for preterm birth.
Authors must pay an additional fee for their review to be truly open access. Sampling methods Random sampling had been used in only five of the 26 studies as most of the studies were based on convenience sampling.
The first is to increase the sample size of the study. There is random error in all sampling procedures. This requires an understanding of which conditions are relevant or irrelevant to the generalization.
Some reviews mentioned conducting a quality assessment; however, the methodology used was not clear, while information on methodological quality assessment was found missing or unclear in a few reviews.
This planning assists in meeting the requirements of the systematic review and in answering the research question. Applying language restrictions is not recommended; but, unavoidable constraints such as a lack of access to translation services or funds to pay for these may make it necessary to restrict the systematic review or reviews to English language publications.
This task requires the forward-looking ability of modern risk management approaches that transform health risk factors, incidence, prevalence and mortality statistics derived from epidemiological analysis into management metrics that not only guide how a health system responds to current population health issues, but also how a health system can be managed to better respond to future potential population health issues.
In doing this, it is important that data from individual studies are not used more than once. The search terms used for the literature search should be clearly described, with information on their relevance to the research question.
Four studies did not describe the sampling method used [ 1923303135 ]. The Campbell Collaboration "helps people make well-informed decisions by preparing, maintaining and disseminating systematic reviews in education, crime and justice, social welfare and international development.
Throughout, the edition of the Dietary Guidelines notes the strength of evidence supporting its recommendations. Diagnostic test accuracy reviews assess how well a diagnostic test performs in diagnosing and detecting a particular disease. With the exception of De Bock et al.
The United States is a highly diverse nation, with people from many backgrounds, cultures, and traditions, and with varied personal preferences.
Such innovative research methods should take the developmental stages of the children into account and could perhaps rely more heavily on pictures or on IT material.
This paper describes the conduct and methods used to identify and appraise published and unpublished systematic reviews systematically. Random error affects measurement in a transient, inconsistent manner and it is impossible to correct for random error.
However, decision makers are increasingly faced by a plethora of such reviews and these are likely to be of variable quality and scope, with more than one review of important topics. Topics that are supported by strong evidence often lead to policy recommendations with the greatest emphasis because of the confidence generated by the evidence.
Systematic reviews are a valuable and independent component to decision making processes by groups responsible for developing science-based recommendations and policies. An example of systematic error is if, unknown to you, the pulse oximeter you are using is set incorrectly and adds two points to the true value each time a measurement is taken.Systematic reviews originated in the biomedical field and currently form the basis of decision-making in Evidence-Based Treatment (EBT) and evidence-based behavioral practice (EBBP).
For additional information, read this entry in the e-reference book The A-Z of Social Research. Systematic reviews are a type of literature review that uses systematic methods to collect secondary data, critically appraise research studies, and synthesize findings qualitatively or quantitatively.
Systematic reviews formulate research questions that are broad or narrow in scope, and identify and synthesize studies that directly relate to the systematic review question.
In this open access edited volume, international researchers of the field describe and discuss the systematic review method in its application to education research. Reflections and practical examples are included and provide an introduction and overview on systematic reviews in education research.A Guide to Conducting a Systematic Literature Review pdf Information Systems Research Chitu Pdf Concordia University, Canada Kira Schabram Concordia University, Canada Abstract Levy and Ellis () and Webster and Watson () lament the fact that information systems (IS) scholars tend to be unaware of the need for structure in literature.REVIEW Open Access Systematic review of control groups in nutrition education intervention research Carol Byrd-Bredbenner1, FanFan Wu1, Kim Spaccarotella2, Virginia Quick1*, Jennifer Martin-Biggers1 and Yingting Zhang1 Abstract Background: Well-designed research trials are critical for determining the efficacy and effectiveness of nutritionCited by: 9.Systematic reviews are a valuable and independent component to decision making ebook by groups responsible for developing science-based recommendations and policies.
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