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Results by year

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 16
2019 17
2020 14
2021 19
2022 36
2023 26
2024 12

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342 results

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Page 1
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.
How should a cluster randomized trial be analyzed?
Billot L, Copas A, Leyrat C, Forbes A, Turner EL. Billot L, et al. Among authors: copas a. J Epidemiol Popul Health. 2024 Feb;72(1):202196. doi: 10.1016/j.jeph.2024.202196. Epub 2024 Feb 10. J Epidemiol Popul Health. 2024. PMID: 38477477
Collecting and exploiting data to understand a nation's sexual health needs: Implications for the British National Surveys of Sexual Attitudes and Lifestyles (Natsal).
Mercer CH, Clifton S, Prior G, Aldridge RW, Bonell C, Copas AJ, Field N, Gibbs J, Macdowall W, Mitchell KR, Tanton C, Thomson N, Unemo M, Sonnenberg P. Mercer CH, et al. Among authors: copas aj. Sex Transm Infect. 2019 May;95(3):159-161. doi: 10.1136/sextrans-2018-053571. Epub 2019 Mar 19. Sex Transm Infect. 2019. PMID: 30890634 Free PMC article. No abstract available.
A Quantitative Process for Enhancing End of Phase 2 Decisions.
Sabin T, Matcham J, Bray S, Copas A, Parmar MK. Sabin T, et al. Among authors: copas a. Stat Biopharm Res. 2014 Jan;6(1):67-77. doi: 10.1080/19466315.2013.852617. Epub 2014 Feb 1. Stat Biopharm Res. 2014. PMID: 24683441 Free PMC article.
How important is randomisation in a stepped wedge trial?
Hargreaves JR, Prost A, Fielding KL, Copas AJ. Hargreaves JR, et al. Among authors: copas aj. Trials. 2015 Aug 16;16:359. doi: 10.1186/s13063-015-0872-1. Trials. 2015. PMID: 26275907 Free PMC article.
342 results