Berendes, Sima; Palmer, Melissa J; Hickson, Ford Colin Ian; Bradley, Ellen; McCarthy, Ona L; Carpenter, James R; Free, Caroline; (2024) Age, sex and sexual orientation effects in the Safetxt trial: secondary data analysis of a randomised controlled trial. Sexually Transmitted Infections. sextrans-2024-056285-. ISSN 1368-4973 DOI: https://doi.org/10.1136/sextrans-2024-056285 Item availability may be restricted.

Chandrasekar, Abinaya; Warren, Emily; Free, Caroline; Mbogua, Judie; Curtin, Esther; Gazeley, Ursula; Wong, Geoffrey; Church, Kathryn; McCarthy, Ona; (2024) mHealth interventions for postpartum family planning in LMICs: A realist review. PLOS Glob Public Health, 4 (7). e0003432-. DOI: https://doi.org/10.1371/journal.pgph.0003432

McCarthy, Ona L; Fardousi, Nasser; Tripathi, Vandana; Stafford, Renae; Levin, Karen; Khan, Farhad; Pepper, Maxine; Campbell, Oona MR; (2024) Antenatal Care Interventions to Increase Contraceptive Use Following Birth in Low- and Middle-Income Countries: Systematic Review and Narrative Synthesis. Global Health Science and Practice, 12 (5). e2400059-e2400059. ISSN 2169-575X DOI: https://doi.org/10.9745/GHSP-D-24-00059

Meiksin, Rebecca; Lewandowska, Maria; Scott, Rachel H; Palmer, Melissa; McCarthy, Ona; Salaria, Natasha; Lohr, Patricia A; Shawe, Jill; French, Rebecca Sophia; Wellings, Kaye; +1 more... SACHA Study Team; (2024) Patient and health professional attitudes towards the use of telemedicine for abortion care in Britain: Findings from the SACHA study. Digital health, 10. 20552076241288717-. ISSN 2055-2076 DOI: https://doi.org/10.1177/20552076241288717

Wellings, Kaye; Scott, Rachel H; Sheldon, Sally; McCarthy, Ona; Palmer, Melissa J; Shawe, Jill; Meiksin, Rebecca; Lewandowska, Maria; Cameron, Sharon T; Reiter, Jennifer; +3 more... French, Rebecca S; SACHA Study Team; SACHA study team; (2024) Attitudes towards the regulation and provision of abortion among healthcare professionals in Britain: cross-sectional survey data from the SACHA Study. BMJ sexual & reproductive health. bmjsrh-2024-202353-. ISSN 2515-1991 DOI: https://doi.org/10.1136/bmjsrh-2024-202353

Free, Caroline; Palmer, Melissa J; Potter, Kimberley; McCarthy, Ona L; Jerome, Lauren; Berendes, Sima; Gubijev, Anasztazia; Knight, Megan; Jamal, Zahra; Dhaliwal, Farandeep; +15 more... Carpenter, James R; Morris, Tim P; Edwards, Phil; French, Rebecca; Macgregor, Louis; Turner, Katy ME; Baraitser, Paula; Hickson, Ford CI; Wellings, Kaye; Roberts, Ian; Bailey, Julia V; Hart, Graham; Michie, Susan; Clayton, Tim; Devries, Karen; (2023) Behavioural intervention to reduce sexually transmitted infections in people aged 16–24 years in the UK: the safetxt RCT. Public health research, 11 (1). pp. 1-96. ISSN 2050-4381 DOI: https://doi.org/10.3310/dane8826

Mohan, Sailesh; Chaudhry, Monica; McCarthy, Ona; Jarhyan, Prashant; Calvert, Clara; Jindal, Devraj; Shakya, Rajani; Radovich, Emma; Kondal, Dimple; Penn-Kekana, Loveday; +10 more... Basany, Kalpana; Roy, Ambuj; Tandon, Nikhil; Shrestha, Abha; Shrestha, Abha; Karmacharya, Biraj; Cairns, John; Perel, Pablo; Campbell, Oona MR; Prabhakaran, Dorairaj; (2023) A cluster randomized controlled trial of an electronic decision-support system to enhance antenatal care services in pregnancy at primary healthcare level in Telangana, India: trial protocol. BMC pregnancy and childbirth, 23 (1). 72-. ISSN 1471-2393 DOI: https://doi.org/10.1186/s12884-022-05249-y

Dziva Chikwari, Chido; Dauya, Ethel; Bandason, Tsitsi; Tembo, Mandikudza; Mavodza, Constancia; Simms, Victoria; Mackworth-Young, Constance RS; Apollo, Tsitsi; Grundy, Chris; Weiss, Helen; +14 more... Kranzer, Katharina; Mavimba, Tino; Indravudh, Pitchaya; Doyle, Aoife; Mugurungi, Owen; Machiha, Anna; Bernays, Sarah; Busza, Joanna; Madzima, Bernard; Terris-Prestholt, Fern; McCarthy, Ona; Hayes, Richard; Francis, Suzanna; Ferrand, Rashida A; (2022) The impact of community-based integrated HIV and sexual and reproductive health services for youth on population-level HIV viral load and sexually transmitted infections in Zimbabwe: protocol for the CHIEDZA cluster-randomised trial. Wellcome Open Research, 7. p. 54. ISSN 2398-502X DOI: https://doi.org/10.12688/wellcomeopenres.17530.1

Dziva Chikwari, Chido; Dauya, Ethel; Bandason, Tsitsi; Tembo, Mandikudza; Mavodza, Constancia; Simms, Victoria; Mackworth-Young, Constance Rs; Apollo, Tsitsi; Grundy, Chris; Weiss, Helen; +14 more... Kranzer, Katharina; Mavimba, Tino; Indravudh, Pitchaya; Doyle, Aoife; Mugurungi, Owen; Machiha, Anna; Bernays, Sarah; Busza, Joanna; Madzima, Bernard; Terris-Prestholt, Fern; McCarthy, Ona; Hayes, Richard; Francis, Suzanna; Ferrand, Rashida A; (2022) The impact of community-based integrated HIV and sexual and reproductive health services for youth on population-level HIV viral load and sexually transmitted infections in Zimbabwe: protocol for the CHIEDZA cluster-randomised trial. Wellcome open research, 7. 54-. ISSN 2398-502X DOI: https://doi.org/10.12688/wellcomeopenres.17530.2

Free, Caroline; Palmer, Melissa J; McCarthy, Ona L; Jerome, Lauren; Berendes, Sima; Knight, Megan; Carpenter, James R; Morris, Tim P; Jamal, Zahra; Dhaliwal, Farandeep; +15 more... French, Rebecca S; Hickson, Ford Colin Ian; Gubijev, Anasztazia; Wellings, Kaye; Baraitser, Paula; Roberts, Ian; Bailey, Julia V; Clayton, Tim; Devries, Karen; Edwards, Phil; Hart, Graham; Michie, Susan; Macgregor, Louis; Turner, Katy ME; Potter, Kimberley; (2022) Effectiveness of a behavioural intervention delivered by text messages (safetxt) on sexually transmitted reinfections in people aged 16-24 years: randomised controlled trial. BMJ, 378. e070351-. ISSN 0959-8138 DOI: https://doi.org/10.1136/bmj-2022-070351

Free, Caroline; Palmer, Melissa; McCarthy, Ona; Jerome, Lauren; Berendes, Sima; Knight, Megan; Carpenter, James; Morris, Tim; Jamal, Zahra; Dhaliwal, Farandeep; +15 more... French, Rebecca; Hickson, Ford Colin Ian; Gubijev, Anasztazia; Wellings, Kaye; Baraitser, Paula; Roberts, Ian; Bailey, Julia; Clayton, Tim; Devries, Karen; Edwards, Phil; Hart, Graham; Michie, Susan; Macgregor, Louis; Turner, Katy ME; Potter, Kimberley; (2022) Safetxt: A randomised controlled trial of a behavioural intervention delivered by text messages to reduce sexually transmitted re-infections in people aged 16-24. British Medical Journal, 378. e070351. ISSN 1759-2151 https://researchonline.lshtm.ac.uk/id/eprint/4666559

Jerome, Lauren; Potter, Kimberley; McCarthy, Ona; Palmer, Melissa; Knight, Megan; Free, Caroline; (2022) A dynamic and collaborative approach to trial recruitment in safetxt, a UK sexual health randomised controlled trial. Clinical Trials, 19 (3). pp. 251-258. ISSN 1740-7745 DOI: https://doi.org/10.1177/17407745221078882

McCarthy, Ona L; Mavodza, Constancia; Chikwari, Chido Dziva; Dauya, Ethel; Tembo, Mandikudza; Hlabangana, Portia; Dembetembe, Regedzai; Mpakami, Nyasha; Bandason, Tsitsi; Free, Caroline; +2 more... Smith, Chris; Ferrand, Rashida A; (2022) Adapting an evidence-based contraceptive behavioural intervention delivered by mobile phone for young people in Zimbabwe. BMC Health Services Research, 22 (1). 106-. DOI: https://doi.org/10.1186/s12913-022-07501-9

McCarthy, Ona L; Palmer, Melissa J; Gubijev, Anasztazia; Wellings, Kaye; Mann, Sue; Leon, Lydia; Callaghan, Faye; Patterson, Sophie; French, Rebecca S; (2022) Achieving proportional representation in a reproductive health survey through social media: process and recommendations. BMC Public Health, 22 (1). 1370-. ISSN 1471-2458 DOI: https://doi.org/10.1186/s12889-022-13774-w

Berendes, Sima; Gubijev, Anasztazia; McCarthy, Ona L; Palmer, Melissa J; Wilson, Emma; Free, Caroline; (2021) Sexual health interventions delivered to participants by mobile technology: a systematic review and meta-analysis of randomised controlled trials. Sexually Transmitted Infections, 97 (3). pp. 190-200. ISSN 1368-4973 DOI: https://doi.org/10.1136/sextrans-2020-054853

Free, Caroline; McCarthy, Ona L; Palmer, Melissa J; Knight, Rosemary; Edwards, Phil; French, Rebecca; Baraitser, Paula; Hickson, Ford Colin Ian; Wellings, Kaye; Roberts, Ian; +9 more... Bailey, Julia V; Hart, Graham; Michie, Susan; Clayton, Tim; Ploubidis, George B; Carpenter, James R; Turner, Katy ME; Devries, Karen; Potter, Kimberley; (2020) Safetxt: a safer sex intervention delivered by mobile phone messaging on sexually transmitted infections (STI) among young people in the UK - protocol for a randomised controlled trial. BMJ OPEN, 10 (3). e031635-. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2019-031635

McCarthy, OL; (2019) Changing young people's attitudes towards effective contraception using mobile phone messaging. PhD (research paper style) thesis, London School of Hygiene & Tropical Medicine. DOI: https://doi.org/10.17037/PUBS.04653004

McCarthy, Ona L; Zghayyer, Hanadi; Stavridis, Amina; Adada, Samia; Ahamed, Irrfan; Leurent, Baptiste; Edwards, Phil; Palmer, Melissa; Free, Caroline; (2019) A randomized controlled trial of an intervention delivered by mobile phone text message to increase the acceptability of effective contraception among young women in Palestine. Trials, 20 (1). 228-. DOI: https://doi.org/10.1186/s13063-019-3297-4

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, Ona L; Wazwaz, Ola; Osorio Calderon, Veronica; Jado, Iman; Saibov, Salokhiddin; Stavridis, Amina; López Gallardo, Jhonny; Tokhirov, Ravshan; Adada, Samia; Huaynoca, Silvia; +4 more... Makleff, Shelly; Vandewiele, Marieka; Standaert, Sarah; Free, Caroline; (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). 576-. ISSN 1471-2458 DOI: https://doi.org/10.1186/s12889-018-5477-7

McCarthy, Ona; Ahamed, Irrfan; Kulaeva, Firuza; Tokhirov, Ravshan; Saibov, Salokhiddin; Vandewiele, Marieka; Standaert, Sarah; Leurent, Baptiste; Edwards, Phil; Palmer, Melissa; +1 more... Free, Caroline; (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). 28-. ISSN 1742-4755 DOI: https://doi.org/10.1186/s12978-018-0473-z

McCarthy, Ona L; Osorio Calderon, Veronica; Makleff, Shelly; Huaynoca, Silvia; Leurent, Baptiste; Edwards, Phil; Lopez Gallardo, Jhonny; Free, Caroline; (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, Ona L; Wazwaz, Ola; Jado, Iman; Leurent, Baptiste; Edwards, Phil; Adada, Samia; Stavridis, Amina; Free, Caroline; (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). 454-. ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-017-2191-1

McCarthy, Ona; Leurent, Baptiste; Edwards, Phil; Tokhirov, Ravshan; Free, Caroline; (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

Free, Caroline; McCarthy, Ona; French, Rebecca S; Wellings, Kaye; Michie, Susan; Roberts, Ian; Devries, Karen; Rathod, Sujit; Bailey, Julia; Syred, Jonathan; +4 more... Edwards, Phil; Hart, Graham; Palmer, Melissa; Baraitser, Paula; (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, Rebecca Sophia; McCarthy, Ona; Baraitser, Paula; Wellings, Kaye; Bailey, Julia V; Free, Caroline; (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, Ona L; French, Rebecca S; Baraitser, Paula; Roberts, Ian; Rathod, Sujit D; Devries, Karen; Bailey, Julia V; Edwards, Phil; Wellings, Kaye; Michie, Susan; +1 more... Free, Caroline; (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). 28-. ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-016-1155-1

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. https://researchonline.lshtm.ac.uk/id/eprint/2534525

Smith, Chris; Ngo, Thoai D; Gold, Judy; Edwards, Phil; Vannak, Uk; Sokhey, Ly; Machiyama, Kazuyo; Slaymaker, Emma; Warnock, Ruby; McCarthy, Ona; +1 more... Free, Caroline; (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). 842-50A. ISSN 0042-9686 DOI: https://doi.org/10.2471/BLT.15.160267

Bailey, Julia V; Pavlou, Menelaos; Copas, Andrew; McCarthy, Ona; Carswell, Ken; Rait, Greta; Hart, Graham; Nazareth, Irwin; Free, Caroline; French, Rebecca; +1 more... Murray, Elizabeth; (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, Kenneth; McCarthy, Ona; Murray, Elizabeth; Bailey, Julia V; (2012) Integrating psychological theory into the design of an online intervention for sexual health: the sexunzipped website. JMIR research protocols, 1 (2). e16-. ISSN 1929-0748 DOI: https://doi.org/10.2196/resprot.2114

McCarthy, Ona; Carswell, Kenneth; Murray, Elizabeth; Free, Caroline; Stevenson, Fiona; Bailey, Julia V; (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] https://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] https://researchonline.lshtm.ac.uk/id/eprint/563 Full text not available from this repository.

Richens, John; Copas, Andrew; Sadiq, Syed Tariq; Kingori, Patricia; McCarthy, Ona; Jones, Victoria; Hay, Philip; Miles, Kevin; Gilson, Richard; Imrie, John; +1 more... Pakianathan, Mark; (2010) A randomised controlled trial of computer-assisted interviewing in sexual health clinics. Sexually transmitted infections, 86 (4). pp. 310-314. 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. 274-280. ISSN 0007-0920 DOI: https://doi.org/10.1038/sj.bjc.6604836