Works by Copas, Andrew

Results: 147

Prevalence and Correlates of Fearing a Partner During the COVID-19 Pandemic in Britain: Findings from Natsal-COVID.

Published in:

Journal of Family Violence, 2025, v. 40, n. 4, p. 649, doi. 10.1007/s10896-023-00665-w

By:

Willis, Malachi;
Tanton, Clare;
Conolly, Anne;
Baxter, Andrew J.;
Pérez, Raquel Bosó;
Riddell, Julie;
Dema, Emily;
Copas, Andrew J.;
Macdowall, Wendy;
Bonell, Chris;
Mercer, Catherine H.;
Sonnenberg, Pam;
Field, Nigel;
Mitchell, Kirstin R.

Publication type:

Article

Testing approaches to sharing trial results with participants: The Show RESPECT cluster randomised, factorial, mixed methods trial.

Published in:

2021

By:

South, Annabelle;
Joharatnam-Hogan, Nalinie;
Purvis, Cara;
James, Elizabeth C.;
Diaz-Montana, Carlos;
Cragg, William J.;
Tweed, Conor;
Macnair, Archie;
Sydes, Matthew R.;
Snowdon, Claire;
Gillies, Katie;
Isaacs, Talia;
Bierer, Barbara E.;
Copas, Andrew J.

Publication type:

journal article

Determinants of long-acting reversible contraceptive (LARC) use by adolescent girls and young women.

Published in:

European Journal of Contraception & Reproductive Health Care, 2012, v. 17, n. 4, p. 298, doi. 10.3109/13625187.2012.675602

By:

Bharadwaj, Preeti;
Akintomide, Hannat;
Brima, Nataliya;
Copas, Andrew;
D'Souza, Rachel

Publication type:

Article

Comparing indicators of disease severity among patients presenting to hospital for urinary tract infections before and during the COVID-19 pandemic.

Published in:

JAC-Antimicrobial Resistance, 2024, v. 6, n. 2, p. 1, doi. 10.1093/jacamr/dlae067

By:

Patel, Selina;
Gill, Martin;
Hayward, Andrew;
Hopkins, Susan;
Copas, Andrew;
Shallcross, Laura

Publication type:

Article

An interactive website for informed contraception choice: randomised evaluation of Contraception Choices.

Published in:

Digital Health, 2020, v. 6, p. 1, doi. 10.1177/2055207620936435

By:

Stephenson, Judith;
Bailey, Julia V;
Gubijev, Ana;
D'Souza, Preethy;
Oliver, Sandy;
Blandford, Ann;
Hunter, Rachael;
Shawe, Jill;
Rait, Greta;
Brima, Nataliya;
Copas, Andrew

Publication type:

Article

An interactive website for informed contraception choice: randomised evaluation of Contraception Choices.

Published in:

Digital Health, 2020, p. 1, doi. 10.1177/2055207620936435

By:

Stephenson, Judith;
Bailey, Julia V;
Gubijev, Ana;
D'Souza, Preethy;
Oliver, Sandy;
Blandford, Ann;
Hunter, Rachael;
Shawe, Jill;
Rait, Greta;
Brima, Nataliya;
Copas, Andrew

Publication type:

Article

Defining linkage to care following human immunodeficiency virus (HIV) diagnosis for public health monitoring in Europe.

Published in:

Eurosurveillance (15607917), 2018, v. 23, n. 48, p. 21, doi. 10.2807/1560-7917.ES.2018.23.48.1700858

By:

Croxford, Sara;
Raben, Dorthe;
Jakobsen, Stine F.;
Burns, Fiona;
Copas, Andrew;
Brown, Alison E.;
Delpech, Valerie C.

Publication type:

Article

The use of chaperones for intimate examinations: the patient perspective based on an anonymous questionnaire.

Published in:

International Journal of STD & AIDS, 2007, v. 18, n. 10, p. 667, doi. 10.1258/095646207782193759

By:

Osmond, Mark K.;
Copas, Andrew J.;
Newey, Charlotte;
Edwards, Simon G.;
Jungmann, Eva;
Mercey, Danielle

Publication type:

Article

The utility of screening for parasitic infections in HIV-1-infected Africans with eosinophilia in London.

Published in:

International Journal of STD & AIDS, 2007, v. 18, n. 9, p. 626, doi. 10.1258/095646207781568420

By:

Sarner, Liat;
Fakoya, Ade O.;
Tawana, Cheryl;
Allen, Elizabeth;
Copas, Andrew J.;
Chiodini, Peter L.;
Fenton, Kevin A.

Publication type:

Article

Assessing End of Phase 2 Decision Criteria.

Published in:

Statistics in Biopharmaceutical Research, 2015, v. 7, n. 3, p. 230, doi. 10.1080/19466315.2015.1064467

By:

Sabin, Tony;
Matcham, James;
Copas, Andrew;
Parmar, Mahesh K. B.

Publication type:

Article

Community participatory learning and action cycle groups to reduce type 2 diabetes in Bangladesh (D:Clare): an updated study protocol for a parallel arm cluster randomised controlled trial.

Published in:

Trials, 2023, v. 24, p. 1, doi. 10.1186/s13063-023-07243-x

By:

King, Carina;
Pires, Malini;
Ahmed, Naveed;
Akter, Kohenour;
Kuddus, Abdul;
Copas, Andrew;
Haghparast-Bidgoli, Hassan;
Morrison, Joanna;
Nahar, Tasmin;
Shaha, Sanjit Kumer;
Khan, AKAzad;
Azad, Kishwar;
Fottrell, Edward

Publication type:

Article

Isisekelo Sempilo study protocol for the effectiveness of HIV prevention embedded in sexual health with or without peer navigator support (Thetha Nami) to reduce prevalence of transmissible HIV amongst adolescents and young adults in rural KwaZulu-Natal: a 2 × 2 factorial randomised controlled trial.

Published in:

2022

By:

Chidumwa, Glory;
Chimbindi, Natsayi;
Herbst, Carina;
Okeselo, Nonhlanhla;
Dreyer, Jaco;
Zuma, Thembelihle;
Smith, Theresa;
Molina, Jean-Michel;
Khoza, Thandeka;
McGrath, Nuala;
Seeley, Janet;
Pillay, Deenan;
Tanser, Frank;
Harling, Guy;
Sherr, Lorraine;
Copas, Andrew;
Baisley, Kathy;
Shahmanesh, Maryam

Publication type:

journal article

The long-term effects of a peer-led sex education programme (RIPPLE): a cluster randomised trial in schools in England.

Published in:

2008

By:

Stephenson J;
Strange V;
Allen E;
Copas A;
Johnson A;
Bonell C;
Babiker A;
Oakley A;
RIPPLE Study Team;
Stephenson, Judith;
Strange, Vicki;
Allen, Elizabeth;
Copas, Andrew;
Johnson, Anne;
Bonell, Chris;
Babiker, Abdel;
Oakley, Ann

Publication type:

journal article

The Long-Term Effects of a Peer-Led Sex Education Programme (RIPPLE): A Cluster Randomised Trial in Schools in England.

Published in:

PLoS Medicine, 2008, v. 5, n. 11, p. e224

By:

Stephenson, Judith;
Strange, Vicki;
Allen, Elizabeth;
Copas, Andrew;
Johnson, Anne;
Bonell, Chris;
Babiker, Abdel;
Oakley, Ann

Publication type:

Article

Changes in COVID-19 outbreak severity and duration in long-term care facilities following vaccine introduction, England, November 2020 to June 2021.

Published in:

Eurosurveillance (15607917), 2021, v. 26, n. 46, p. 2, doi. 10.2807/1560-7917.ES.2021.26.46.2100995

By:

Giddings, Rebecca;
Krutikov, Maria;
Palmer, Tom;
Fuller, Christopher;
Azmi, Borscha;
Shrotri, Madhumita;
Irwin-Singer, Aidan;
Tut, Gokhan;
Moss, Paul;
Copas, Andrew;
Shallcross, Laura

Publication type:

Article

An observer-blinded, cluster randomised trial of a typhoid conjugate vaccine in an urban South Indian cohort.

Published in:

Trials, 2023, v. 24, n. 1, p. 1, doi. 10.1186/s13063-023-07555-y

By:

Sahai, Nikhil;
Arunachalam, Dilesh Kumar;
Morris, Tim;
Copas, Andrew;
Samuel, Prasanna;
Mohan, Venkata Raghava;
Abraham, Vinod;
Selwyn, Joshua Anish;
Kumar, Praveen;
Rose, Winsley;
Balaji, Veeraraghavan;
Kang, Gagandeep;
John, Jacob

Publication type:

Article

Optimal design of cluster randomized trials allowing unequal allocation of clusters and unequal cluster size between arms.

Published in:

Statistics in Medicine, 2021, v. 40, n. 25, p. 5474, doi. 10.1002/sim.9135

By:

Copas, Andrew J.;
Hooper, Richard

Publication type:

Article

Sample size and power calculations for open cohort longitudinal cluster randomized trials.

Published in:

2020

By:

Kasza, Jessica;
Hooper, Richard;
Copas, Andrew;
Forbes, Andrew B.

Publication type:

journal article

Natural T Cell-mediated Protection against Seasonal and Pandemic Influenza. Results of the Flu Watch Cohort Study.

Published in:

2015

By:

Hayward, Andrew C;
Wang, Lili;
Goonetilleke, Nilu;
Fragaszy, Ellen B;
Bermingham, Alison;
Copas, Andrew;
Dukes, Oliver;
Millett, Elizabeth R C;
Nazareth, Irwin;
Nguyen-Van-Tam, Jonathan S;
Watson, John M;
Zambon, Maria;
Johnson, Anne M;
McMichael, Andrew J;
Flu Watch Group

Publication type:

journal article

Natural T Cell-mediated Protection against Seasonal and Pandemic Influenza.

Published in:

American Journal of Respiratory & Critical Care Medicine, 2015, v. 191, n. 12, p. 1422, doi. 10.1164/rccm.201411-1988OC

By:

Hayward, Andrew C.;
Lili Wang;
Goonetilleke, Nilu;
Fragaszy, Ellen B.;
Bermingham, Alison;
Copas, Andrew;
Dukes, Oliver;
Millett, Elizabeth R. C.;
Nazareth, Irwin;
Nguyen-Van-Tam, Jonathan S.;
Watson, John M.;
Zambon, Maria;
Johnson, Anne M.;
McMichael, Andrew J.

Publication type:

Article

An evaluation of whether propensity score adjustment can remove the self-selection bias inherent to web panel surveys addressing sensitive health behaviours.

Published in:

2020

By:

Copas, Andrew;
Burkill, Sarah;
Conrad, Fred;
Couper, Mick P.;
Erens, Bob

Publication type:

journal article

Estimands in cluster-randomized trials: choosing analyses that answer the right question.

Published in:

International Journal of Epidemiology, 2023, v. 52, n. 1, p. 107, doi. 10.1093/ije/dyac131

By:

Kahan, Brennan C;
Li, Fan;
Copas, Andrew J;
Harhay, Michael O

Publication type:

Article

Prevalence and Determinants of Unintended Pregnancy in Mchinji District, Malawi; Using a Conceptual Hierarchy to Inform Analysis.

Published in:

PLoS ONE, 2016, v. 11, n. 10, p. 1, doi. 10.1371/journal.pone.0165621

By:

Hall, Jennifer Anne;
Barrett, Geraldine;
Phiri, Tambosi;
Copas, Andrew;
Malata, Address;
Stephenson, Judith

Publication type:

Article

Oral Human Papillomavirus Infection in Men Who Have Sex with Men: A Systematic Review and Meta-Analysis.

Published in:

PLoS ONE, 2016, v. 11, n. 7, p. 1, doi. 10.1371/journal.pone.0157976

By:

King, Eleanor M.;
Oomeer, Soonita;
Gilson, Richard;
Copas, Andrew;
Beddows, Simon;
Soldan, Kate;
Jit, Mark;
Edmunds, W. John;
Sonnenberg, Pam

Publication type:

Article

HIV Incidence Estimates Using the Limiting Antigen Avidity EIA Assay at Testing Sites in Kiev City, Ukraine: 2013-2014.

Published in:

PLoS ONE, 2016, v. 11, n. 6, p. 1, doi. 10.1371/journal.pone.0157179

By:

Simmons, Ruth;
Malyuta, Ruslan;
Chentsova, Nelli;
Karnets, Iryna;
Murphy, Gary;
Medoeva, Antonia;
Kruglov, Yuri;
Yurchenko, Alexander;
Copas, Andrew;
Porter, Kholoud;
null, null

Publication type:

Article

Using the Web to Collect Data on Sensitive Behaviours: A Study Looking at Mode Effects on the British National Survey of Sexual Attitudes and Lifestyles.

Published in:

PLoS ONE, 2016, v. 11, n. 2, p. 1, doi. 10.1371/journal.pone.0147983

By:

Burkill, Sarah;
Copas, Andrew;
Couper, Mick P.;
Clifton, Soazig;
Prah, Philip;
Datta, Jessica;
Conrad, Frederick;
Wellings, Kaye;
Johnson, Anne M.;
Erens, Bob

Publication type:

Article

Re-analysis of data from cluster randomised trials to explore the impact of model choice on estimates of odds ratios: study protocol.

Published in:

Trials, 2024, v. 25, n. 1, p. 1, doi. 10.1186/s13063-024-08653-1

By:

Hemming, Karla;
Thompson, Jacqueline Y.;
Taljaard, Monica;
Watson, Samuel I.;
Kasza, Jessica;
Thompson, Jennifer A.;
Kahan, Brennan C.;
Copas, Andrew J.

Publication type:

Article

Combined models for pre- and post-treatment longitudinal biomarker data: an application to CD4 counts in HIV-patients.

Published in:

2016

By:

Stirrup, Oliver T.;
Babiker, Abdel G.;
Copas, Andrew J.

Publication type:

journal article

Quantifying, displaying and accounting for heterogeneity in the meta-analysis of RCTs using standard and generalised Q statistics.

Published in:

BMC Medical Research Methodology, 2011, v. 11, n. 1, p. 41, doi. 10.1186/1471-2288-11-41

By:

Bowden, Jack;
Tierney, Jayne F.;
Copas, Andrew J.;
Burdett, Sarah

Publication type:

Article

Clinical Effectiveness of SARS-CoV-2 Booster Vaccine Against Omicron Infection in Residents and Staff of Long-term Care Facilities: A Prospective Cohort Study (VIVALDI).

Published in:

Open Forum Infectious Diseases, 2023, v. 10, n. 1, p. 1, doi. 10.1093/ofid/ofac694

By:

Stirrup, Oliver;
Shrotri, Madhumita;
Adams, Natalie L;
Krutikov, Maria;
Nacer-Laidi, Hadjer;
Azmi, Borscha;
Palmer, Tom;
Fuller, Christopher;
Irwin-Singer, Aidan;
Baynton, Verity;
Tut, Gokhan;
Moss, Paul;
Hayward, Andrew;
Copas, Andrew;
Shallcross, Laura

Publication type:

Article

Should Tyrosine Kinase Inhibitors Be Considered for Advanced Non-Small-Cell Lung Cancer Patients With Wild Type EGFR? Two Systematic Reviews and Meta-Analyses of Randomized Trials.

Published in:

Clinical Lung Cancer, 2015, v. 16, n. 3, p. 173, doi. 10.1016/j.cllc.2014.11.007

By:

Vale, Claire L.;
Burdett, Sarah;
Fisher, David J.;
Navani, Neal;
Parmar, Mahesh K. B.;
Copas, Andrew J.;
Tierney, Jayne F.

Publication type:

Article

Reassessing pregnancy intention and its relation to maternal, perinatal and neonatal outcomes in a low-income setting: A cohort study.

Published in:

PLoS ONE, 2018, v. 13, n. 10, p. 1, doi. 10.1371/journal.pone.0205487

By:

Hall, Jennifer Anne;
Barrett, Geraldine;
Copas, Andrew;
Phiri, Tambosi;
Malata, Address;
Stephenson, Judith

Publication type:

Article

Early Predictors of Mortality from Pneumocystis jirovecii Pneumonia in HIV-Infected Patients: 1985-2006.

Published in:

Clinical Infectious Diseases, 2008, v. 46, n. 4, p. 625, doi. 10.1086/526778

By:

Waizer, Peter D.;
Evans, Hannah E. R.;
Copas, Andrew J.;
Edwards, Simon G.;
Grant, Alison D.;
Miller, Robert F.

Publication type:

Article

How important is randomisation in a stepped wedge trial?

Published in:

Trials, 2015, v. 16, n. 1, p. 1, doi. 10.1186/s13063-015-0872-1

By:

Hargreaves, James R.;
Prost, Audrey;
Fielding, Katherine L.;
Copas, Andrew J.

Publication type:

Article

Designing a stepped wedge trial: three main designs, carry-over effects and randomisation approaches.

Published in:

Trials, 2015, v. 16, n. 1, p. 1, doi. 10.1186/s13063-015-0842-7

By:

Copas, Andrew J.;
Lewis, James J.;
Thompson, Jennifer A.;
Davey, Calum;
Baio, Gianluca;
Hargreaves, James R.

Publication type:

Article

Five questions to consider before conducting a stepped wedge trial.

Published in:

Trials, 2015, v. 16, n. 1, p. 1, doi. 10.1186/s13063-015-0841-8

By:

Hargreaves, James R.;
Copas, Andrew J.;
Beard, Emma;
Osrin, David;
Lewis, James J.;
Davey, Calum;
Thompson, Jennifer A.;
Baio, Gianluca;
Fielding, Katherine L.;
Prost, Audrey

Publication type:

Article

Sample size calculation for a stepped wedge trial.

Published in:

Trials, 2015, v. 16, n. 1, p. 1, doi. 10.1186/s13063-015-0840-9

By:

Baio, Gianluca;
Copas, Andrew;
Ambler, Gareth;
Hargreaves, James;
Beard, Emma;
Omar, Rumana Z.

Publication type:

Article

Stepped wedge randomised controlled trials: systematic review of studies published between 2010 and 2014.

Published in:

Trials, 2015, v. 16, n. 1, p. 1, doi. 10.1186/s13063-015-0839-2

By:

Beard, Emma;
Lewis, James J.;
Copas, Andrew;
Davey, Calum;
Osrin, David;
Baio, Gianluca;
Thompson, Jennifer A.;
Fielding, Katherine L.;
Omar, Rumana Z.;
Ononge, Sam;
Hargreaves, James;
Prost, Audrey

Publication type:

Article

Analysis and reporting of stepped wedge randomisedcontrolledtrials:synthesisandcritical appraisalofpublishedstudies,2010to2014.

Published in:

Trials, 2015, v. 16, n. 1, p. 1, doi. 10.1186/s13063-015-0838-3

By:

Davey, Calum;
Hargreaves, James;
Thompson, Jennifer A.;
Copas, Andrew J.;
Beard, Emma;
Lewis, James J.;
Fielding, Katherine L.

Publication type:

Article

Sample size calculation for a stepped wedge trial.

Published in:

Trials, 2015, v. 16, n. 1, p. 354, doi. 10.1186/s13063-015-0840-9

By:

Baio, Gianluca;
Copas, Andrew;
Ambler, Gareth;
Hargreaves, James;
Beard, Emma;
Omar, Rumana Z

Publication type:

Article

Stepped wedge randomised controlled trials: systematic review of studies published between 2010 and 2014.

Published in:

Trials, 2015, v. 16, n. 1, p. 353, doi. 10.1186/s13063-015-0839-2

By:

Beard, Emma;
Lewis, James J.;
Copas, Andrew;
Davey, Calum;
Osrin, David;
Baio, Gianluca;
Thompson, Jennifer A.;
Fielding, Katherine L.;
Omar, Rumana Z.;
Ononge, Sam;
Hargreaves, James;
Prost, Audrey

Publication type:

Article

Five questions to consider before conducting a stepped wedge trial.

Published in:

Trials, 2015, v. 16, n. 1, p. 350, doi. 10.1186/s13063-015-0841-8

By:

Hargreaves, James R.;
Copas, Andrew J.;
Beard, Emma;
Osrin, David;
Lewis, James J.;
Davey, Calum;
Thompson, Jennifer A.;
Baio, Gianluca;
Fielding, Katherine L.;
Prost, Audrey

Publication type:

Article

Designing a stepped wedge trial: three main designs, carry-over effects and randomisation approaches.

Published in:

Trials, 2015, v. 16, n. 1, p. 352, doi. 10.1186/s13063-015-0842-7

By:

Copas, Andrew J.;
Lewis, James J.;
Thompson, Jennifer A.;
Davey, Calum;
Baio, Gianluca;
Hargreaves, James R.

Publication type:

Article

Analysis and reporting of stepped wedge randomisedcontrolledtrials:synthesisandcritical appraisalofpublishedstudies,2010to2014.

Published in:

Trials, 2015, v. 16, n. 1, p. 358, doi. 10.1186/s13063-015-0838-3

By:

Davey, Calum;
Hargreaves, James;
Thompson, Jennifer A.;
Copas, Andrew J.;
Beard, Emma;
Lewis, James J.;
Fielding, Katherine L.

Publication type:

Article

How important is randomisation in a stepped wedge trial?

Published in:

Trials, 2015, v. 16, n. 1, p. 359, doi. 10.1186/s13063-015-0872-1

By:

Hargreaves, James R;
Prost, Audrey;
Fielding, Katherine L.;
Copas, Andrew J.

Publication type:

Article

Sample size calculation for a stepped wedge trial.

Published in:

2015

By:

Baio, Gianluca;
Copas, Andrew;
Ambler, Gareth;
Hargreaves, James;
Beard, Emma;
Omar, Rumana Z

Publication type:

journal article

Designing a stepped wedge trial: three main designs, carry-over effects and randomisation approaches.

Published in:

2015

By:

Copas, Andrew J;
Lewis, James J;
Thompson, Jennifer A;
Davey, Calum;
Baio, Gianluca;
Hargreaves, James R

Publication type:

journal article

Five questions to consider before conducting a stepped wedge trial.

Published in:

2015

By:

Hargreaves, James R;
Copas, Andrew J;
Beard, Emma;
Osrin, David;
Lewis, James J;
Davey, Calum;
Thompson, Jennifer A;
Baio, Gianluca;
Fielding, Katherine L;
Prost, Audrey

Publication type:

journal article

Analysis and reporting of stepped wedge randomised controlled trials: synthesis and critical appraisal of published studies, 2010 to 2014.

Published in:

2015

By:

Davey, Calum;
Hargreaves, James;
Thompson, Jennifer A;
Copas, Andrew J;
Beard, Emma;
Lewis, James J;
Fielding, Katherine L

Publication type:

journal article

Stepped wedge randomised controlled trials: systematic review of studies published between 2010 and 2014.

Published in:

2015

By:

Beard, Emma;
Lewis, James J;
Copas, Andrew;
Davey, Calum;
Osrin, David;
Baio, Gianluca;
Thompson, Jennifer A;
Fielding, Katherine L;
Omar, Rumana Z;
Ononge, Sam;
Hargreaves, James;
Prost, Audrey

Publication type:

journal article