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

Year Number of Results
1995 1
1996 2
1997 3
1998 3
1999 1
2000 2
2001 9
2002 5
2003 7
2004 5
2005 15
2006 16
2007 11
2008 9
2009 12
2010 10
2011 13
2012 11
2013 19
2014 22
2015 34
2016 22
2017 16
2018 15
2019 16
2020 14
2021 18
2022 16
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Search Results

289 results
Results by year
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Page 1
Vaccine effectiveness of the first dose of ChAdOx1 nCoV-19 and BNT162b2 against SARS-CoV-2 infection in residents of long-term care facilities in England (VIVALDI): a prospective cohort study.
Shrotri M, Krutikov M, Palmer T, Giddings R, Azmi B, Subbarao S, Fuller C, Irwin-Singer A, Davies D, Tut G, Lopez Bernal J, Moss P, Hayward A, Copas A, Shallcross L. Shrotri M, et al. Among authors: copas a. Lancet Infect Dis. 2021 Nov;21(11):1529-1538. doi: 10.1016/S1473-3099(21)00289-9. Epub 2021 Jun 23. Lancet Infect Dis. 2021. PMID: 34174193 Free PMC article.
Sample size calculation for a stepped wedge trial.
Baio G, Copas A, Ambler G, Hargreaves J, Beard E, Omar RZ. Baio G, et al. Among authors: copas a. Trials. 2015 Aug 17;16:354. doi: 10.1186/s13063-015-0840-9. Trials. 2015. PMID: 26282553 Free PMC article. Review.
Using electronic patient records to assess the effect of a complex antenatal intervention in a cluster randomised controlled trial-data management experience from the DESiGN Trial team.
Relph S, Elstad M, Coker B, Vieira MC, Moitt N, Gutierrez WM, Khalil A, Sandall J, Copas A, Lawlor DA, Pasupathy D; DESIGN Trial team. Relph S, et al. Among authors: copas a. Trials. 2021 Mar 8;22(1):195. doi: 10.1186/s13063-021-05141-8. Trials. 2021. PMID: 33685512 Free PMC article. Clinical Trial.
289 results