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Year Number of Results
1995 1
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2002 5
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2004 5
2005 15
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2009 12
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371 results

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Page 1
Reporting of stepped wedge cluster randomised trials: extension of the CONSORT 2010 statement with explanation and elaboration.
Hemming K, Taljaard M, McKenzie JE, Hooper R, Copas A, Thompson JA, Dixon-Woods M, Aldcroft A, Doussau A, Grayling M, Kristunas C, Goldstein CE, Campbell MK, Girling A, Eldridge S, Campbell MJ, Lilford RJ, Weijer C, Forbes AB, Grimshaw JM. Hemming K, et al. Among authors: copas a. BMJ. 2018 Nov 9;363:k1614. doi: 10.1136/bmj.k1614. BMJ. 2018. PMID: 30413417 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.
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 Free PMC article.
Differences in Factors Associated With Preterm and Term Stillbirth: A Secondary Cohort Analysis of the DESiGN Trial.
Winsloe C, Elhindi J, Vieira MC, Relph S, Arcus CG, Alagna A, Briley A, Johnson M, Page LM, Shennan A, Thilaganathan B, Marlow N, Lees C, Lawlor DA, Khalil A, Sandall J, Copas A, Pasupathy D; DESiGN Trial team. Winsloe C, et al. Among authors: copas a. BJOG. 2025 Jan;132(1):89-98. doi: 10.1111/1471-0528.17951. Epub 2024 Sep 18. BJOG. 2025. PMID: 39291344 Free PMC article. Clinical Trial.
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.
371 results