Validity of secondary retail food outlet data: a systematic review.
Summary of "Validity of secondary retail food outlet data: a systematic review."
Improving access to healthy foods is a promising strategy to prevent nutrition-related chronic diseases. To characterize retail food environments and identify areas with limited retail access, researchers, government programs, and community advocates have primarily used secondary retail food outlet data sources (e.g., InfoUSA or government food registries). To advance the state of the science on measuring retail food environments, this systematic review examined the evidence for validity reported for secondary retail food outlet data sources for characterizing retail food environments.
Division of Nutrition Research Coordination (Fleischhacker), National Institute of Diabetes and Digestive and Kidney Diseases of NIH, Bethesda, Maryland. Electronic address: firstname.lastname@example.org.
This article was published in the following journal.
Name: American journal of preventive medicine
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/24050423
- DOI: http://dx.doi.org/10.1016/j.amepre.2013.06.009
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Medical and Biotech [MESH] Definitions
Systematic gathering of data for a particular purpose from various sources, including questionnaires, interviews, observation, existing records, and electronic devices. The process is usually preliminary to statistical analysis of the data.
Any deviation of results or inferences from the truth, or processes leading to such deviation. Bias can result from several sources: one-sided or systematic variations in measurement from the true value (systematic error); flaws in study design; deviation of inferences, interpretations, or analyses based on flawed data or data collection; etc. There is no sense of prejudice or subjectivity implied in the assessment of bias under these conditions.
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Committees established to review interim data and efficacy outcomes in clinical trials. The findings of these committees are used in deciding whether a trial should be continued as designed, changed, or terminated. Government regulations regarding federally-funded research involving human subjects (the "Common Rule") require (45 CFR 46.111) that research ethics committees reviewing large-scale clinical trials monitor the data collected using a mechanism such as a data monitoring committee. FDA regulations (21 CFR 50.24) require that such committees be established to monitor studies conducted in emergency settings.