Andrew J Copas (Andrew Copas, A J Copas)

Scopus Author ID ORCID

Publication Activity (10 Years)

Years Active: 2014-2024
Publications (10 Years): 47

Top Topics

Randomized Controlled Trial

Gestational Age

Cross Sectional

Top Venues

Sexually transmitted infections

Clinical trials (London, England)

This page only lists publications with an associated author ORCID identifier.

Publications

Conor D Tweed, Matteo Quartagno, Michelle N Clements, Rebecca M Turner, Andrew J Nunn, David T Dunn, Ian R White, Andrew J Copas
Exploring different objectives in non-inferiority trials. BMJ (Clinical research ed.) 385 (2024)
Conor D Tweed, Matteo Quartagno, Michelle N Clements, Rebecca M Turner, Andrew J Nunn, David T Dunn, Ian R White, Andrew J Copas
Exploring different objectives in non-inferiority trials. BMJ (Clinical research ed.) 385 (2024)
Conor D Tweed, Matteo Quartagno, Michelle N Clements, Rebecca M Turner, Andrew J Nunn, David T Dunn, Ian R White, Andrew J Copas
Exploring different objectives in non-inferiority trials. BMJ (Clinical research ed.) 385 (2024)
Brennan C Kahan, Fan Li, Bryan Blette, Vipul Jairath, Andrew J Copas, Michael Harhay
Informative cluster size in cluster-randomised trials: A case study from the TRIGGER trial. Clinical trials (London, England) (2023)
Nondumiso Mthiyane, Antony M Rapulana, Guy Harling, Andrew J Copas, Maryam Shahmanesh
Effect of multi-level interventions on mental health outcomes among adolescents in sub-Saharan Africa: a systematic review. BMJ open 13 (10) (2023)
Carlos S Grijalva-Eternod, Mohamed Jelle, Hani Mohamed, Katie Waller, Bishar Osman Hussein, Emmanuel Barasa, Andrea Solomon, Sajia Mehjabeen, Andrew J Copas, Edward F Fottrell, Andrew J Seal
Evaluation of conditional cash transfers and mHealth audio messaging in reduction of risk factors for childhood malnutrition in internally displaced persons camps in Somalia: A 2 × 2 factorial cluster-randomised controlled trial. PLoS medicine 20 (2) (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Carlos S Grijalva-Eternod, Mohamed Jelle, Hani Mohamed, Katie Waller, Bishar Osman Hussein, Emmanuel Barasa, Andrea Solomon, Sajia Mehjabeen, Andrew J Copas, Edward F Fottrell, Andrew J Seal
Evaluation of conditional cash transfers and mHealth audio messaging in reduction of risk factors for childhood malnutrition in internally displaced persons camps in Somalia: A 2 × 2 factorial cluster-randomised controlled trial. PLoS medicine 20 (2) (2023)
Carlos S Grijalva-Eternod, Mohamed Jelle, Hani Mohamed, Katie Waller, Bishar Osman Hussein, Emmanuel Barasa, Andrea Solomon, Sajia Mehjabeen, Andrew J Copas, Edward F Fottrell, Andrew J Seal
Evaluation of conditional cash transfers and mHealth audio messaging in reduction of risk factors for childhood malnutrition in internally displaced persons camps in Somalia: A 2 × 2 factorial cluster-randomised controlled trial. PLoS medicine 20 (2) (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Annabelle South, Julia Bailey, Barbara E Bierer, Eva Burnett, William J Cragg, Carlos Diaz-Montana, Katie Gillies, Talia Isaacs, Nalinie Joharatnam-Hogan, Claire Snowdon, Matthew Robert Sydes, Andrew J Copas
Site staff perspectives on communicating trial results to participants: Cost and feasibility results from the Show RESPECT cluster randomised, factorial, mixed-methods trial. Clinical trials (London, England) (2023)
Kirstin Rebecca Mitchell, Malachi Willis, Emily Dema, Andrew J Baxter, Anne Connolly, Julie Riddell, Raquel Boso Perez, Soazig Clifton, Jo Gibbs, Clare Tanton, Rebecca Sally Geary, Natasha Ratna, Hamish Mohammed, Magnus Unemo, Christopher Bonell, Andrew J Copas, Pam Sonnenberg, Catherine H Mercer, Nigel Field
Sexual and reproductive health in Britain during the first year of the COVID-19 pandemic: cross-sectional population survey (Natsal-COVID-Wave 2) and national surveillance data. Sexually transmitted infections (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Carlos S Grijalva-Eternod, Mohamed Jelle, Hani Mohamed, Katie Waller, Bishar Osman Hussein, Emmanuel Barasa, Andrea Solomon, Sajia Mehjabeen, Andrew J Copas, Edward F Fottrell, Andrew J Seal
Evaluation of conditional cash transfers and mHealth audio messaging in reduction of risk factors for childhood malnutrition in internally displaced persons camps in Somalia: A 2 × 2 factorial cluster-randomised controlled trial. PLoS medicine 20 (2) (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Natalie Adams, Oliver Stirrup, James Blackstone, Maria Krutikov, Jackie A Cassell, Dorina Cadar, Catherine Henderson, Martin Knapp, Lara Goscé, Ruth Leiser, Martyn Regan, Iona Cullen-Stephenson, Robert Fenner, Arpana Verma, Adam Lee Gordon, Susan Hopkins, Andrew J Copas, Nick Freemantle, Paul Flowers, Laura Shallcross
Shaping care home COVID-19 testing policy: a protocol for a pragmatic cluster randomised controlled trial of asymptomatic testing compared with standard care in care home staff (VIVALDI-CT). BMJ open 13 (11) (2023)
Naomi M Saville, Sanju Bhattarai, Helen Harris-Fry, Santosh Giri, Shraddha Manandhar, Joanna Morrison, Andrew J Copas, Bibhu Thapaliya, Abriti Arjyal, Hassan Haghparast-Bidgoli, Sushil C Baral, Sara Hillman
Study protocol for a randomised controlled trial of a virtual antenatal intervention for improved diet and iron intake in Kapilvastu district, Nepal: VALID. BMJ open 13 (2) (2023)
Andrew J Baxter, Rebecca Sally Geary, Emily Dema, Raquel Boso Perez, Julie Riddell, Malachi Willis, Anne Connolly, Laura L Oakley, Andrew J Copas, Jo Gibbs, Christopher Bonell, Pam Sonnenberg, Catherine H Mercer, Soazig Clifton, Nigel Field, Kirstin Rebecca Mitchell
Contraceptive use and pregnancy planning in Britain during the first year of the COVID-19 pandemic: findings from a large, quasi-representative survey (Natsal-COVID). BMJ sexual & reproductive health (2023)
Jo Gibbs, Alison R Howarth, Jessica Sheringham, Louise J Jackson, Geoff Wong, Andrew J Copas, David J Crundwell, Catherine H Mercer, Hamish Mohammed, Jonathan Ross, Ann K Sullivan, Elizabeth Murray, Fiona M Burns
Assessing the impact of online postal self-sampling for sexually transmitted infections on health inequalities, access to care and clinical outcomes in the UK: protocol for ASSIST, a realist evaluation. BMJ open 12 (12) (2022)
Matias C Vieira, Sophie A Relph, Walter Muruet-Gutierrez, Maria Elstad, Bolaji Coker, Natalie Moitt, Louisa Delaney, Chivon Winsloe, Andrew Healey, Kirstie Coxon, Alessandro Alagna, Annette L Briley, Mark Johnson, Louise M Page, Donald Peebles, Andrew H Shennan, Baskaran Thilaganathan, Neil Marlow, Lesley M E McCowan, Christoph Lees, Deborah A Lawlor, Asma Khalil, Jane Sandall, Andrew J Copas, Dharmintra Pasupathy, null null
Evaluation of the Growth Assessment Protocol (GAP) for antenatal detection of small for gestational age: The DESiGN cluster randomised trial. PLoS medicine 19 (6) (2022)
Kirstin Rebecca Mitchell, Michal Shimonovich, Raquel Boso Perez, Emily Dema, Soazig Clifton, Julie Riddell, Andrew J Copas, Clare Tanton, Wendy G Macdowall, Christopher Bonell, Pam Sonnenberg, Catherine H Mercer, Nigel Field
Initial Impacts of COVID-19 on Sex Life and Relationship Quality in Steady Relationships in Britain: Findings from a Large, Quasi-representative Survey (Natsal-COVID). Journal of sex research (2022)
James Blackstone, Oliver Stirrup, Fiona Mapp, Monica Panca, Andrew J Copas, Paul Flowers, Leanne Hockey, James Price, David G Partridge, Christine Peters, Thushan I de Silva, Gaia Nebbia, Luke Blagdon Snell, Rachel McComish, null null, Judith Breuer
Protocol for the COG-UK hospital-onset COVID-19 infection (HOCI) multicentre interventional clinical study: evaluating the efficacy of rapid genome sequencing of SARS-CoV-2 in limiting the spread of COVID-19 in UK NHS hospitals. BMJ open 12 (4) (2022)
Pam Sonnenberg, Dee Menezes, Lily Freeman, Karen J Maxwell, David S Reid, Soazig Clifton, Clare Tanton, Andrew J Copas, Julie Riddell, Emily Dema, Raquel Boso Perez, Jo Gibbs, Mary-Clare Ridge, Wendy G Macdowall, Magnus Unemo, Christopher Bonell, Anne M Johnson, Catherine H Mercer, Kirstin Rebecca Mitchell, Nigel Field
Intimate physical contact between people from different households during the COVID-19 pandemic: a mixed-methods study from a large, quasi-representative survey (Natsal-COVID). BMJ open 12 (2) (2022)
A Rahman, Shakila Thangaratinam, Andrew J Copas, D Zenner, Peter J White, Christopher J Griffiths, Ibrahim Abubakar, Christine McCourt, Heinke Kunst
A feasibility study evaluating the uptake, effectiveness and acceptability of routine screening of pregnant migrants for latent tuberculosis infection in antenatal care: a research protocol. BMJ open 12 (4) (2022)
Jo Gibbs, Alison R Howarth, Jessica Sheringham, Louise J Jackson, Geoff Wong, Andrew J Copas, David J Crundwell, Catherine H Mercer, Hamish Mohammed, Jonathan Ross, Ann K Sullivan, Elizabeth Murray, Fiona M Burns
Assessing the impact of online postal self-sampling for sexually transmitted infections on health inequalities, access to care and clinical outcomes in the UK: protocol for ASSIST, a realist evaluation. BMJ open 12 (12) (2022)
Fedra Vanhuyse, Oliver Stirrup, Aloyce Odhiambo, Tom Palmer, Sarah Dickin, Jolene Skordis, Neha Batura, Hassan Haghparast-Bidgoli, Alex Mwaki, Andrew J Copas
Effectiveness of conditional cash transfers (Afya credits incentive) to retain women in the continuum of care during pregnancy, birth and the postnatal period in Kenya: a cluster-randomised trial. BMJ open 12 (1) (2022)
Emily Dema, Pam Sonnenberg, Jo Gibbs, Anne Conolly, Malachi Willis, Julie Riddell, Raquel Bosó Pérez, Andrew J Copas, Clare Tanton, Chris Bonell, Clarissa Oeser, Soazig Clifton, Magnus Unemo, Catherine H Mercer, Kirstin R Mitchell, Nigel Field
How did the COVID-19 pandemic affect access to condoms, chlamydia and HIV testing, and cervical cancer screening at a population level in Britain? (Natsal-COVID). Sexually transmitted infections (2022)
Jo Gibbs, Alison R Howarth, Jessica Sheringham, Louise J Jackson, Geoff Wong, Andrew J Copas, David J Crundwell, Catherine H Mercer, Hamish Mohammed, Jonathan Ross, Ann K Sullivan, Elizabeth Murray, Fiona M Burns
Assessing the impact of online postal self-sampling for sexually transmitted infections on health inequalities, access to care and clinical outcomes in the UK: protocol for ASSIST, a realist evaluation. BMJ open 12 (12) (2022)
Jo Gibbs, Alison R Howarth, Jessica Sheringham, Louise J Jackson, Geoff Wong, Andrew J Copas, David J Crundwell, Catherine H Mercer, Hamish Mohammed, Jonathan Ross, Ann K Sullivan, Elizabeth Murray, Fiona M Burns
Assessing the impact of online postal self-sampling for sexually transmitted infections on health inequalities, access to care and clinical outcomes in the UK: protocol for ASSIST, a realist evaluation. BMJ open 12 (12) (2022)
Jo Gibbs, Alison R Howarth, Jessica Sheringham, Louise J Jackson, Geoff Wong, Andrew J Copas, David J Crundwell, Catherine H Mercer, Hamish Mohammed, Jonathan Ross, Ann K Sullivan, Elizabeth Murray, Fiona M Burns
Assessing the impact of online postal self-sampling for sexually transmitted infections on health inequalities, access to care and clinical outcomes in the UK: protocol for ASSIST, a realist evaluation. BMJ open 12 (12) (2022)
Jo Gibbs, Alison R Howarth, Jessica Sheringham, Louise J Jackson, Geoff Wong, Andrew J Copas, David J Crundwell, Catherine H Mercer, Hamish Mohammed, Jonathan Ross, Ann K Sullivan, Elizabeth Murray, Fiona M Burns
Assessing the impact of online postal self-sampling for sexually transmitted infections on health inequalities, access to care and clinical outcomes in the UK: protocol for ASSIST, a realist evaluation. BMJ open 12 (12) (2022)
Sarah Dickin, Fedra Vanhuyse, Oliver Stirrup, Carla Liera, Andrew J Copas, Aloyce Odhiambo, Tom Palmer, Hassan Haghparast-Bidgoli, Neha Batura, Alex Mwaki, Jolene Skordis
Implementation of the Afya conditional cash transfer intervention to retain women in the continuum of care: a mixed-methods process evaluation. BMJ open 12 (9) (2022)
Judith M Stephenson, Julia V Bailey, Ann Blandford, Nataliya Brima, Andrew J Copas, Preethy D'Souza, Anasztazia Gubijev, Rachael Maree Hunter, Jill Shawe, Greta Rait, Sandy Oliver
An interactive website to aid young women's choice of contraception: feasibility and efficacy RCT. Health technology assessment (Winchester, England) 24 (56) (2021)
Wendy G Macdowall, Soazig Clifton, M J Palmer, Clare Tanton, Andrew J Copas, David M Lee, Kirstin Rebecca Mitchell, Catherine H Mercer, Pam Sonnenberg, Anne M Johnson, Kaye Wellings
Salivary Testosterone and Sexual Function and Behavior in Men and Women: Findings from the Third British National Survey of Sexual Attitudes and Lifestyles (Natsal-3). Journal of sex research (2021)
Richard L Hooper, Andrew J Copas
Optimal design of cluster randomised trials with continuous recruitment and prospective baseline period. Clinical trials (London, England) 18 (2) (2021)
Catherine H Mercer, Soazig Clifton, Julie Riddell, Clare Tanton, Lily Freeman, Andrew J Copas, Emily Dema, Raquel Boso Perez, Jo Gibbs, Wendy G Macdowall, Dee Menezes, Mary-Clare Ridge, Christopher Bonell, Pam Sonnenberg, Nigel Field, Kirstin Rebecca Mitchell
Impacts of COVID-19 on sexual behaviour in Britain: findings from a large, quasi-representative survey (Natsal-COVID). Sexually transmitted infections 98 (7) (2021)
Richard Gilson, Diarmuid Nugent, Kate Bennett, Caroline J Doré, Macey L Murray, Jade Meadows, Lewis J Haddow, Charles J Lacey, Frank G Sandmann, Mark Jit, Kate Soldan, Michelle Tetlow, Emilia Caverly, Mayura Nathan, Andrew J Copas
Imiquimod versus podophyllotoxin, with and without human papillomavirus vaccine, for anogenital warts: the HIPvac factorial RCT. Health technology assessment (Winchester, England) 24 (47) (2021)
Annabelle South, Nalinie Joharatnam-Hogan, Cara Purvis, Elizabeth C James, Carlos Diaz-Montana, William J Cragg, Conor D Tweed, Archie Macnair, Matthew Robert Sydes, Claire Snowdon, Katie Gillies, Talia Isaacs, Barbara E Bierer, Andrew J Copas
Testing approaches to sharing trial results with participants: The Show RESPECT cluster randomised, factorial, mixed methods trial. PLoS medicine 18 (10) (2021)
Andrew J Copas, Richard L Hooper
Optimal design of cluster randomized trials allowing unequal allocation of clusters and unequal cluster size between arms. Statistics in medicine 40 (25) (2021)
Andrew J Copas, Sarah Burkill, Fred Conrad, Mick P Couper, Bob Erens
An evaluation of whether propensity score adjustment can remove the self-selection bias inherent to web panel surveys addressing sensitive health behaviours. BMC medical research methodology 20 (1) (2020)
Carina King, Carrie Llewellyn, Maryam Shahmanesh, Charles Abraham, Julia Bailey, Fiona M Burns, Laura Clark, Andrew J Copas, Alison R Howarth, Gwenda Hughes, Catherine H Mercer, Alec Miners, Alex Pollard, Daniel Richardson, Alison J Rodger, Anupama Roy, Richard Gilson
Sexual risk reduction interventions for patients attending sexual health clinics: a mixed-methods feasibility study. Health technology assessment (Winchester, England) 23 (12) (2020)
Andrew J Copas, Richard Hooper
Cluster randomised trials with different numbers of measurements at baseline and endline: Sample size and optimal allocation. Clinical trials (London, England) 17 (1) (2019)
Catherine H Mercer, Soazig Clifton, Gillian Prior, Robert W Aldridge, Christopher Bonell, Andrew J Copas, Nigel Field, Jo Gibbs, Wendy G Macdowall, Kirstin Rebecca Mitchell, Clare Tanton, Nicholas R Thomson, Magnus Unemo, Pam Sonnenberg
Collecting and exploiting data to understand a nation's sexual health needs: Implications for the British National Surveys of Sexual Attitudes and Lifestyles (Natsal). Sexually transmitted infections 95 (3) (2019)
Ibidun Fakoya, Débora Álvarez-Del Arco, Andrew J Copas, Bryan Teixeira, Koen Block, Anne-Francoise Gennotte, Alain Volny-Anne, Janneke P Bil, Giota Touloumi, Julia Del Amo, Fiona M Burns
Factors Associated With Access to HIV Testing and Primary Care Among Migrants Living in Europe: Cross-Sectional Survey. JMIR public health and surveillance 3 (4) (2017)
Ibidun Fakoya, Débora Álvarez-Del Arco, Susana Monge, Andrew J Copas, Anne-Francoise Gennotte, Alain Volny-Anne, Siri Goepel, Giota Touloumi, Maria Prins, Henrique Barros, Cornelia Staehelin, Julia Del Amo, Fiona M Burns
Advancing Migrant Access to Health Services in Europe (AMASE): Protocol for a Cross-sectional Study. JMIR research protocols 5 (2) (2016)
Bob Erens, Sarah M Burkill, Mick P Couper, Frederick Conrad, Soazig Clifton, Clare Tanton, Andrew Phelps, Jessica Datta, Catherine H Mercer, Pam Sonnenberg, Philip Prah, Kirstin Rebecca Mitchell, Kaye Wellings, Anne M Johnson, Andrew J Copas
Nonprobability Web surveys to measure sexual behaviors and attitudes in the general population: a comparison with a probability sample interview survey. Journal of medical Internet research 16 (12) (2014)