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Table representation of search results timeline featuring number of search results per year.
Year
Number of Results
1949
1
1960
1
1962
5
1963
6
1964
57
1965
1097
1966
1132
1967
1128
1968
1292
1969
1450
1970
1519
1971
1475
1972
1841
1973
2087
1974
2459
1975
2932
1976
2966
1977
3000
1978
3238
1979
2825
1980
2641
1981
3135
1982
3305
1983
3862
1984
4058
1985
4468
1986
4885
1987
4851
1988
4874
1989
5489
1990
4211
1991
1380
1992
1717
1993
2492
1994
3818
1995
4171
1996
4269
1997
4736
1998
5421
1999
6403
2000
6988
2001
8693
2002
10114
2003
11506
2004
12052
2005
11966
2006
12306
2007
11623
2008
13025
2009
14084
2010
14334
2011
14194
2012
13572
2013
13930
2014
13233
2015
13720
2016
14069
2017
13847
2018
14800
2019
16418
2020
16766
2021
13750
2022
10064
2023
8776
2024
6554
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Page 1
An introduction to clinical trial design.
Schultz A, Saville BR, Marsh JA, Snelling TL.
Schultz A, et al.
Paediatr Respir Rev. 2019 Nov;32:30-35. doi: 10.1016/j.prrv.2019.06.002. Epub 2019 Jun 26.
Paediatr Respir Rev. 2019.
PMID: 31427159
Review.
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Key concepts of clinical trials: a narrative review.
Umscheid CA, Margolis DJ, Grossman CE.
Umscheid CA, et al.
Postgrad Med. 2011 Sep;123(5):194-204. doi: 10.3810/pgm.2011.09.2475.
Postgrad Med. 2011.
PMID: 21904102
Free PMC article.
Review.
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Adaptive Designs for Clinical Trials.
Bhatt DL, Mehta C.
Bhatt DL, et al.
N Engl J Med. 2016 Jul 7;375(1):65-74. doi: 10.1056/NEJMra1510061.
N Engl J Med. 2016.
PMID: 27406349
Free article.
Review.
No abstract available.
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The clinician as investigator: participating in clinical trials in the practice setting: Appendix 1: fundamentals of study design.
Lader EW, Cannon CP, Ohman EM, Newby LK, Sulmasy DP, Barst RJ, Fair JM, Flather M, Freedman JE, Frye RL, Hand MM, Jesse RL, Van de Werf F, Costa F; American Heart Association.
Lader EW, et al.
Circulation. 2004 Jun 1;109(21):e302-4. doi: 10.1161/01.CIR.0000128807.57602.61.
Circulation. 2004.
PMID: 15173052
Review.
No abstract available.
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Controversies in clinical trials.
Berger VW.
Berger VW.
Stat Methods Med Res. 2008 Jun;17(3):229-30. doi: 10.1177/0962280207081034. Epub 2007 Oct 9.
Stat Methods Med Res. 2008.
PMID: 17925314
No abstract available.
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Adaptive Clinical Trial
Address
Autobiography
Bibliography
Biography
Case Reports
Classical Article
Clinical Conference
Clinical Study
Clinical Trial Protocol
Clinical Trial, Phase I
Clinical Trial, Phase II
Clinical Trial, Phase III
Clinical Trial, Phase IV
Clinical Trial, Veterinary
Collected Work
Comment
Comparative Study
Congress
Consensus Development Conference
Consensus Development Conference, NIH
Controlled Clinical Trial
Corrected and Republished Article
Dataset
Dictionary
Directory
Duplicate Publication
Editorial
Electronic Supplementary Materials
English Abstract
Equivalence Trial
Evaluation Study
Expression of Concern
Festschrift
Government Publication
Guideline
Historical Article
Interactive Tutorial
Interview
Introductory Journal Article
Lecture
Legal Case
Legislation
Letter
Multicenter Study
News
Newspaper Article
Observational Study
Observational Study, Veterinary
Overall
Patient Education Handout
Periodical Index
Personal Narrative
Portrait
Practice Guideline
Pragmatic Clinical Trial
Preprint
Published Erratum
Randomized Controlled Trial, Veterinary
Research Support, American Recovery and Reinvestment Act
Research Support, N.I.H., Extramural
Research Support, N.I.H., Intramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.
Research Support, U.S. Gov't
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