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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1974 1
1980 2
1981 1
1982 3
1983 1
1987 1
1988 2
1989 1
1991 1
1992 3
1993 7
1994 12
1995 79
1996 245
1997 680
1998 1100
1999 1658
2000 1981
2001 2641
2002 2836
2003 2957
2004 3437
2005 3727
2006 4375
2007 4897
2008 5243
2009 4966
2010 5280
2011 5281
2012 5357
2013 5501
2014 5419
2015 5382
2016 6148
2017 5150
2018 4180
2019 4049
2020 4274
2021 3861
2022 3405
2023 3075
2024 4126
2025 2203

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103,813 results

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Page 1
Hierarchy of Evidence Within the Medical Literature.
Wallace SS, Barak G, Truong G, Parker MW. Wallace SS, et al. Hosp Pediatr. 2022 Aug 1;12(8):745-750. doi: 10.1542/hpeds.2022-006690. Hosp Pediatr. 2022. PMID: 35909178
Consideration of the hierarchy of evidence can also aid researchers in designing new studies by helping them determine the next level of evidence needed to improve upon the quality of currently available evidence. Although the concept of the hierarchy …
Consideration of the hierarchy of evidence can also aid researchers in designing new studies by helping them determine …
Easy guide to conducting a systematic review.
Caldwell PH, Bennett T. Caldwell PH, et al. J Paediatr Child Health. 2020 Jun;56(6):853-856. doi: 10.1111/jpc.14853. Epub 2020 May 4. J Paediatr Child Health. 2020. PMID: 32364273
Systematic reviews are considered to provide the highest level of evidence on the hierarchy of evidence pyramid. Systematic reviews are conducted following rigorous research methodology. ...
Systematic reviews are considered to provide the highest level of evidence on the hierarchy of evidence pyramid. System …
A hierarchy of evidence for assessing qualitative health research.
Daly J, Willis K, Small R, Green J, Welch N, Kealy M, Hughes E. Daly J, et al. J Clin Epidemiol. 2007 Jan;60(1):43-9. doi: 10.1016/j.jclinepi.2006.03.014. Epub 2006 Sep 28. J Clin Epidemiol. 2007. PMID: 17161753 Review.
RESULTS: We describe four levels of a qualitative hierarchy of evidence-for-practice. The least likely studies to produce good evidence-for-practice are single case studies, followed by descriptive studies that may provide helpful lists of quotations but do n …
RESULTS: We describe four levels of a qualitative hierarchy of evidence-for-practice. The least likely studies to produ …
Identifying and avoiding bias in research.
Pannucci CJ, Wilkins EG. Pannucci CJ, et al. Plast Reconstr Surg. 2010 Aug;126(2):619-625. doi: 10.1097/PRS.0b013e3181de24bc. Plast Reconstr Surg. 2010. PMID: 20679844 Free PMC article. Review.
This narrative review provides an overview on the topic of bias as part of a series of articles in Plastic and Reconstructive Surgery on evidence-based medicine. Bias can occur in the planning, data collection, analysis, and publication phases of research. .. …
This narrative review provides an overview on the topic of bias as part of a series of articles in Plastic and Reconstructive Surgery on …
Effect of scapular stabilization exercise program in patients with subacromial impingement syndrome: a systematic review.
Ravichandran H, Janakiraman B, Gelaw AY, Fisseha B, Sundaram S, Sharma HR. Ravichandran H, et al. J Exerc Rehabil. 2020 Jun 30;16(3):216-226. doi: 10.12965/jer.2040256.128. eCollection 2020 Jun. J Exerc Rehabil. 2020. PMID: 32724778 Free PMC article. Review.
Articles included in this review were graded ac-cording to Lloyd-Smith hierarchy of evidence scale and critically ap-praised with a tool developed by National, Heart, Lung and Blood Insti-tute (United States), named as quality assessment of controlled inter-v …
Articles included in this review were graded ac-cording to Lloyd-Smith hierarchy of evidence scale and critically ap-pr …
Sex bias in neuroscience and biomedical research.
Beery AK, Zucker I. Beery AK, et al. Neurosci Biobehav Rev. 2011 Jan;35(3):565-72. doi: 10.1016/j.neubiorev.2010.07.002. Epub 2010 Jul 8. Neurosci Biobehav Rev. 2011. PMID: 20620164 Free PMC article. Review.
The NIH mandated enrollment of women in human clinical trials in 1993, but no similar initiatives exist to foster research on female animals. We reviewed sex bias in research on mammals in 10 biological fields for 2009 and their historical precedents. ...
The NIH mandated enrollment of women in human clinical trials in 1993, but no similar initiatives exist to foster research on female animals …
Hierarchy of evidence: a framework for ranking evidence evaluating healthcare interventions.
Evans D. Evans D. J Clin Nurs. 2003 Jan;12(1):77-84. doi: 10.1046/j.1365-2702.2003.00662.x. J Clin Nurs. 2003. PMID: 12519253 Review.
The proposed hierarchy was developed based on a review of literature, investigation of existing hierarchies and examination of the strengths and limitations of different research methods. The proposed hierarchy of evidence focuses on three dimensions of the e …
The proposed hierarchy was developed based on a review of literature, investigation of existing hierarchies and examination of the strengths …
The Forest and the Trees: Evidence-Based Medicine in the Age of Information.
Courtney DB, Bennett K, Szatmari P. Courtney DB, et al. J Am Acad Child Adolesc Psychiatry. 2019 Jan;58(1):8-15. doi: 10.1016/j.jaac.2018.06.035. J Am Acad Child Adolesc Psychiatry. 2019. PMID: 30577942
In 2005, John Hamilton(2) wrote in the Journal on how best to practice evidence-based medicine, namely develop an answerable question from a clinical situation and then work your way down a hierarchy of evidence to identify the best avail …
In 2005, John Hamilton(2) wrote in the Journal on how best to practice evidence-based medicine, namely develop an answe …
Effects of chlorhexidine mouthwash on the oral microbiome.
Brookes ZLS, Belfield LA, Ashworth A, Casas-Agustench P, Raja M, Pollard AJ, Bescos R. Brookes ZLS, et al. J Dent. 2021 Oct;113:103768. doi: 10.1016/j.jdent.2021.103768. Epub 2021 Aug 18. J Dent. 2021. PMID: 34418463 Review.
Here, we aimed to review the effects of CHX mouthwash on the balance of microbial communities in the mouth in vivo in oral health and disease. SOURCES AND STUDY SECTION: The hierarchy of evidence was applied, with systematic reviews and randomised controlled …
Here, we aimed to review the effects of CHX mouthwash on the balance of microbial communities in the mouth in vivo in oral health and diseas …
Understanding the Levels of Evidence in Medical Research.
Vatkar A, Kale S, Shyam A, Srivastava S. Vatkar A, et al. J Orthop Case Rep. 2025 May;15(5):6-9. doi: 10.13107/jocr.2025.v15.i05.5534. J Orthop Case Rep. 2025. PMID: 40351623 Free PMC article.
The advancement of evidence-based medicine (EBM) depends on the evidence hierarchy, a framework for classifying research approaches according to their dependability and quality. ...
The advancement of evidence-based medicine (EBM) depends on the evidence hierarchy, a framework for classifying researc …
103,813 results
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