| Sexual behaviour in Britain: partnerships, practices, and HIV risk behaviours AM Johnson, CH Mercer, B Erens, AJ Copas, S McManus, K Wellings, ... The Lancet 358 (9296), 1835-1842, 2001 | 1096 | 2001 |
| Detection of Kaposi sarcoma associated herpesvirus in peripheral blood of HIV-infected individuals and progression to Kaposi's sarcoma D Whitby, C Boshoff, T Hatzioannou, RA Weiss, TF Schulz, MR Howard, ... The lancet 346 (8978), 799-802, 1995 | 1026 | 1995 |
| Sexual behaviour in Britain: early heterosexual experience K Wellings, K Nanchahal, W Macdowall, S McManus, B Erens, CH Mercer, ... The lancet 358 (9296), 1843-1850, 2001 | 940 | 2001 |
| Changes in sexual attitudes and lifestyles in Britain through the life course and over time: findings from the National Surveys of Sexual Attitudes and Lifestyles (Natsal) CH Mercer, C Tanton, P Prah, B Erens, P Sonnenberg, S Clifton, ... The Lancet 382 (9907), 1781-1794, 2013 | 904 | 2013 |
| Women's groups practising participatory learning and action to improve maternal and newborn health in low-resource settings: a systematic review and meta-analysis A Prost, T Colbourn, N Seward, K Azad, A Coomarasamy, A Copas, ... The Lancet 381 (9879), 1736-1746, 2013 | 701 | 2013 |
| Sexual function in Britain: findings from the third National Survey of Sexual Attitudes and Lifestyles (Natsal-3) KR Mitchell, CH Mercer, GB Ploubidis, KG Jones, J Datta, N Field, ... The Lancet 382 (9907), 1817-1829, 2013 | 561 | 2013 |
| Sexual behaviour in Britain: reported sexually transmitted infections and prevalent genital Chlamydia trachomatis infection KA Fenton, C Korovessis, AM Johnson, A McCadden, S McManus, ... The Lancet 358 (9296), 1851-1854, 2001 | 541 | 2001 |
| The prevalence of unplanned pregnancy and associated factors in Britain: findings from the third National Survey of Sexual Attitudes and Lifestyles (Natsal-3) K Wellings, KG Jones, CH Mercer, C Tanton, S Clifton, J Datta, AJ Copas, ... The Lancet 382 (9907), 1807-1816, 2013 | 538 | 2013 |
| Comparative community burden and severity of seasonal and pandemic influenza: results of the Flu Watch cohort study AC Hayward, EB Fragaszy, A Bermingham, L Wang, A Copas, ... The Lancet Respiratory Medicine 2 (6), 445-454, 2014 | 491 | 2014 |
| Quantifying, displaying and accounting for heterogeneity in the meta-analysis of RCTs using standard and generalised Qstatistics J Bowden, JF Tierney, AJ Copas, S Burdett BMC medical research methodology 11, 1-12, 2011 | 472 | 2011 |
| Prevalence, risk factors, and uptake of interventions for sexually transmitted infections in Britain: findings from the National Surveys of Sexual Attitudes and Lifestyles (Natsal) P Sonnenberg, S Clifton, S Beddows, N Field, K Soldan, C Tanton, ... The Lancet 382 (9907), 1795-1806, 2013 | 430 | 2013 |
| Mortality and causes of death in people diagnosed with HIV in the era of highly active antiretroviral therapy compared with the general population: an analysis of a national … S Croxford, A Kitching, S Desai, M Kall, M Edelstein, A Skingsley, F Burns, ... The Lancet Public Health 2 (1), e35-e46, 2017 | 398 | 2017 |
| Methods for sample size determination in cluster randomized trials C Rutterford, A Copas, S Eldridge International journal of epidemiology 44 (3), 1051-1067, 2015 | 365 | 2015 |
| Tenofovir‐associated renal and bone toxicity CLN Woodward, AM Hall, IG Williams, S Madge, A Copas, D Nair, ... HIV medicine 10 (8), 482-487, 2009 | 353 | 2009 |
| Reporting of stepped wedge cluster randomised trials: extension of the CONSORT 2010 statement with explanation and elaboration K Hemming, M Taljaard, JE McKenzie, R Hooper, A Copas, JA Thompson, ... bmj 363, 2018 | 351 | 2018 |
| Evaluation of respondent-driven sampling N McCreesh, SDW Frost, J Seeley, J Katongole, MN Tarsh, R Ndunguse, ... Epidemiology 23 (1), 138-147, 2012 | 336 | 2012 |
| Combining multiple imputation and inverse-probability weighting SR Seaman, IR White, AJ Copas, L Li Biometrics 68 (1), 129-137, 2012 | 309 | 2012 |
| Pupil-led sex education in England (RIPPLE study): cluster-randomised intervention trial JM Stephenson, V Strange, S Forrest, A Oakley, A Copas, E Allen, ... The Lancet 364 (9431), 338-346, 2004 | 288 | 2004 |
| Natural T cell–mediated protection against seasonal and pandemic influenza. Results of the flu watch cohort study AC Hayward, L Wang, N Goonetilleke, EB Fragaszy, A Bermingham, ... American journal of respiratory and critical care medicine 191 (12), 1422-1431, 2015 | 262 | 2015 |
| Designing a stepped wedge trial: three main designs, carry-over effects and randomisation approaches AJ Copas, JJ Lewis, JA Thompson, C Davey, G Baio, JR Hargreaves Trials 16, 1-12, 2015 | 253 | 2015 |
