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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.
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.
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.
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.
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.
Clinical trials update 2015: Year in review.
Peroutka SJ. Peroutka SJ. Headache. 2016 Jan;56(1):178-84. doi: 10.1111/head.12744. Epub 2015 Dec 21. Headache. 2016. PMID: 26790852 Review.
394,444 results
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