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Level II-1: Evidence obtained from well-designed controlled trials without randomization. Level II-2: Evidence obtained from well-designed cohort or case-control analytic studies, preferably from more than one center or research group. Level II-3: Evidence obtained from multiple time series designs with or without the intervention. Dramatic ...
Even in reputable medical journals, different papers are not given equal weight. Studies can be categorized into levels in a hierarchy of evidence, [6] and editors should rely on high-level evidence, such as systematic reviews. Low-level evidence (such as case reports or series) or non-evidence (such as anecdotes or conventional wisdom) are ...
Negative consequences of rankings are generally well-documented and relate to the performativity of using journal rankings for performance measurement purposes. [20] [21] Studies of methodological quality and reliability have found that "reliability of published research works in several fields may be decreasing with increasing journal rank", [22] contrary to widespread expectations.
Contains an abstracts database and an electronic paper collection, arranged by discipline. Free Social Science Electronic Publishing, Inc. [145] Sparrho: Multidisciplinary: Sparrho is a personalised platform that allows users to discover, curate and share over 60 million scientific research articles and patents from 45k+ journals and preprint ...
A systematic review is a scholarly synthesis of the evidence on a clearly presented topic using critical methods to identify, define and assess research on the topic. [1] A systematic review extracts and interprets data from published studies on the topic (in the scientific literature), then analyzes, describes, critically appraises and summarizes interpretations into a refined evidence-based ...
This page contains links to the 10,000 articles of the Level 4 list. Any modification to these lists should ONLY BE MADE after a discussion on the Level 4 talk page . Level 1 (10 articles) < Level 2 (100 articles) < Level 3 (1,000 articles) < Level 4 (10,000 articles) < Level 5 (50,000 articles)
[1] [2] Hierarchy of study design, for example using a case-study, ecological study, cross-sectional, case-control, cohort, or experimental, although not always in this order is a general rule to a high "strength of evidence" of a clinical study. [3] [4] [5]
CEBM has developed a widely adopted [6] systematic hierarchy of the quality of medical research evidence, named the levels of evidence. Systematic reviews of randomised clinical trials (encompassing homogeneity) are seen as the highest possible level of evidence, as full assessment and aggregated synthesis of underlying evidence is possible.