McCarthy, O; Ahamed, I; Kulaeva, F; Tokhirov, R; Saibov, S; Vandewiele, M; Standaert, S; Leurent, B; Edwards, P; Palmer, M; +1 more... Free, C; (2018) Correction to: A randomized controlled trial of an intervention delivered by mobile phone app instant messaging to increase the acceptability of effective contraception among young people in Tajikistan. BMC. DOI: https://doi.org/10.1186/s12978-018-0496-5

McCarthy, O; Ahamed, I; Kulaeva, F; Tokhirov, R; Saibov, S; Vandewiele, M; Standaert, S; Leurent, B; Edwards, P; Palmer, M; +1 more... Free, C; (2018) A randomized controlled trial of an intervention delivered by mobile phone app instant messaging to increase the acceptability of effective contraception among young people in Tajikistan. Reproductive health, 15 (1). p. 28. ISSN 1742-4755 DOI: https://doi.org/10.1186/s12978-018-0473-z

McCarthy, OL; Wazwaz, O; Osorio Calderon, V; Jado, I; Saibov, S; Stavridis, A; López Gallardo, J; Tokhirov, R; Adada, S; Huaynoca, S; +4 more... Makleff, S; Vandewiele, M; Standaert, S; Free, C; (2018) Development of an intervention delivered by mobile phone aimed at decreasing unintended pregnancy among young people in three lower middle income countries. BMC public health, 18 (1). p. 576. ISSN 1471-2458 DOI: https://doi.org/10.1186/s12889-018-5477-7

McCarthy, O; Leurent, B; Edwards, P; Tokhirov, R; Free, C; (2017) A randomised controlled trial of an intervention delivered by app instant messaging to increase the acceptability of effective contraception among young people in Tajikistan: study protocol. BMJ open, 7 (9). e017606. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2017-017606

McCarthy, OL; Osorio Calderon, V; Makleff, S; Huaynoca, S; Leurent, B; Edwards, P; Lopez Gallardo, J; Free, C; (2017) An Intervention Delivered by App Instant Messaging to Increase Acceptability and Use of Effective Contraception Among Young Women in Bolivia: Protocol of a Randomized Controlled Trial. JMIR research protocols, 6 (12). e252. ISSN 1929-0748 DOI: https://doi.org/10.2196/resprot.8679

McCarthy, OL; Wazwaz, O; Jado, I; Leurent, B; Edwards, P; Adada, S; Stavridis, A; Free, C; (2017) An intervention delivered by text message to increase the acceptability of effective contraception among young women in Palestine: study protocol for a randomised controlled trial. Trials, 18 (1). p. 454. ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-017-2191-1

Free, C; McCarthy, O; French, RS; Wellings, K; Michie, S; Roberts, I; Devries, K; Rathod, S; Bailey, J; Syred, J; +4 more... Edwards, P; Hart, G; Palmer, M; Baraitser, P; (2016) Can text messages increase safer sex behaviours in young people? Intervention development and pilot randomised controlled trial. Health technology assessment (Winchester, England), 20 (57). pp. 1-82. ISSN 1366-5278 DOI: https://doi.org/10.3310/hta20570

French, RS; McCarthy, O; Baraitser, P; Wellings, K; Bailey, JV; Free, C; (2016) Young People's Views and Experiences of a Mobile Phone Texting Intervention to Promote Safer Sex Behavior. JMIR mHealth and uHealth, 4 (2). e26. ISSN 2291-5222 DOI: https://doi.org/10.2196/mhealth.4302

McCarthy, O; French, RS; Roberts, I; Free, C; (2016) Simple steps to develop trial follow-up procedures. Trials, 17 (1). p. 28. ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-016-1155-1

McCarthy, OL; French, RS; Baraitser, P; Roberts, I; Rathod, SD; Devries, K; Bailey, JV; Edwards, P; Wellings, K; Michie, S; +1 more... Free, C; (2016) Safetxt: a pilot randomised controlled trial of an intervention delivered by mobile phone to increase safer sex behaviours in young people. BMJ open, 6 (12). e013045. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2016-013045

McCarthy, Ona; French, Rebecca S; Roberts, Ian; Free, Caroline; (2016) Simple steps to develop trial follow-up procedures. TRIALS, 17 (1). ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-016-1614-8

French, R; McCarthy, O; Baraitser, P; Wellings, K; Bailey, J; Free, C; (2015) Young people’s views and experiences of a mobile phone texting intervention to promote safer sex behaviour. Journal of Medical Internet Research. http://researchonline.lshtm.ac.uk/id/eprint/2534525

Smith, C; Ngo, TD; Gold, J; Edwards, P; Vannak, U; Sokhey, L; Machiyama, K; Slaymaker, E; Warnock, R; McCarthy, O; +1 more... Free, C; (2015) Effect of a mobile phone-based intervention on post-abortion contraception: a randomized controlled trial in Cambodia. Bulletin of the World Health Organization, 93 (12). 842-850A. ISSN 0042-9686 DOI: https://doi.org/10.2471/BLT.15.160267

Bailey, JV; Pavlou, M; Copas, A; McCarthy, O; Carswell, K; Rait, G; Hart, G; Nazareth, I; Free, C; French, R; +1 more... Murray, E; (2013) The Sexunzipped trial: optimizing the design of online randomized controlled trials. Journal of medical Internet research, 15 (12). e278. ISSN 1439-4456 DOI: https://doi.org/10.2196/jmir.2668

Carswell, K; McCarthy, O; Murray, E; Bailey, JV; (2012) Integrating psychological theory into the design of an online intervention for sexual health: the sexunzipped website. JMIR Res Protoc, 1 (2). e16. ISSN 1929-0748 DOI: https://doi.org/10.2196/resprot.2114

McCarthy, O; Carswell, K; Murray, E; Free, C; Stevenson, F; Bailey, JV; (2012) What young people want from a sexual health website: design and development of sexunzipped. Journal of medical Internet research, 14 (5). e127. ISSN 1439-4456 DOI: https://doi.org/10.2196/jmir.2116

Bailey, J; McCarthy, O; Carswell, K; Murray, E; Rait, G; Hart, G; Nazareth, I; Free, C; French, R; Stevenson, F; (2011) The Sexunzipped Website for Sexual Wellbeing for Young People: Early Results of a Pilot Online RCT. [Conference or Workshop Item] http://researchonline.lshtm.ac.uk/id/eprint/562 Full text not available from this repository.

McCarthy, O; Carswell, K; Free, C; Stevenson, F; Murray, E; Hart, G; French, R; Bailey, J; (2011) Developing the 'Sexunzipped' Website: Young People's Views on the Design and Content of an Online Sexual Health Intervention. [Conference or Workshop Item] http://researchonline.lshtm.ac.uk/id/eprint/563 Full text not available from this repository.

Richens, J; Copas, A; Sadiq, ST; Kingori, P; McCarthy, O; Jones, V; Hay, P; Miles, K; Gilson, R; Imrie, J; +1 more... Pakianathan, M; (2010) A randomised controlled trial of computer-assisted interviewing in sexual health clinics. Sexually transmitted infections, 86 (4). pp. 310-4. ISSN 1368-4973 DOI: https://doi.org/10.1136/sti.2010.043422 Full text not available from this repository.

King, M; Jones, L; McCarthy, O; Rogers, M; Richardson, A; Williams, R; Tookman, A; Nazareth, I; (2009) Development and pilot evaluation of a complex intervention to improve experienced continuity of care in patients with cancer. British journal of cancer, 100 (2). pp. 274-80. ISSN 0007-0920 DOI: https://doi.org/10.1038/sj.bjc.6604836