Powell J, Atherton H, Williams V, Martin A, Bennett K, Bennett, A, Mollison J, Yu L-M, Yang Y, Locock L, Davoudianfar M, Griffiths KM. Effectiveness and cost-effectiveness of a fully self-guided internet-based intervention for sub-clinical social anxiety symptoms: study protocol for a randomised controlled trial. Digital Health, 2017. 10 April 2017. doi:10.1177/2055207617702272

Velthoven MVV, Powell J. Do health apps need endorsement? Challenges for giving advice about which health apps are safe and effective to use. Digital Health, 2017. 10 April 2017. doi: 10.1177/2055207617701342

Powell J, Newhouse N, Martin A, Jawad S, Yu L-M, Davoudianfar M, Locock L, Ziebland S. A novel experience-based internet intervention for smoking cessation: feasibility randomised controlled trial. BMC Public Health, 2016, Volume 16, Number 1, Page 1.

Newhouse N, Martin A, Jawad S, Yu L-M, Davoudianfar M, Locock L, Ziebland S, Powell J. Randomised feasibility study of a novel experience-based internet intervention to support self-management in chronic asthma BMJ Open 2016;6:e013401. doi: 10.1136/bmjopen-2016-013401

Ziebland S, Powell J, Briggs P, Jenkinson C, Wyke S, Sillence E, Harris P, Perera R, Mazanderani F, Martin A, Locock L, Kelly L, Booth M, Gann B, Newhouse N & Farmer A. Examining the role of patients' experiences as a resource for choice and decision-making in health care: a creative, interdisciplinary mixed-method study in digital health. Programme Grants for Applied Research Volume: 4, Issue:17, December 2016

Deetjen U, Powell J. Internet use and health: Connecting secondary data through spatial microsimulation. Digital Health. 2016: November 1, 2016 DOI:

Powell J, Newhouse N, Boylan A-M, Williams V. Digital health citizens and the future of the NHS. Digital Health. 2016, 2 2055207616672033; DOI: 10.1177/2055207616672033

Powell J. E-mental health. Digital Health. 2016. November 22, 2016 DOI:

Devi R, Singh S, Powell J, Fulton E, Rees K. Cochrane Corner: are there benefits of using web-based interventions in the secondary prevention of coronary heart disease? Heart 2016;0:1–2. doi:10.1136/heartjnl-2015-309138

Campbell B,  Tabiri-Essuman J, Gallo H, Verdiel V, Mandava L, Azhar MA, Powell J. Public consultation changes guidance on the use of health care interventions. Observational study. Health Expectations 2017;20:361–368. doi:10.1111/hex.12476

Deetjen U, Powell J. Informational and Emotional Elements in Online Support Groups: A Bayesian Approach to Large-scale Content Analysis. Journal of the American Medical Informatics Association 2016 Feb 15. pii: ocv190. doi: 10.1093/jamia/ocv190. [Epub ahead of print]

Oyebode O, Patrick H, Walker A, Campbell B, Powell J. The Ghost in the Machine? The value of expert advice in the production of evidence-based guidance. In Press. International Journal of Technology Assessment in Health Care 2016 Mar 22:1-8. [Epub ahead of print]

Devi R, Singh SJ, Powell J, Fulton EA, Igbinedion E, Rees K. Internet-based interventions for the secondary prevention of coronary heart disease. Cochrane Database of Systematic Reviews 2015, Issue 12. Art. No.: CD009386. DOI: 10.1002/14651858.CD009386.pub2.

Powell J, Boylan A-M, Greaves F. Editorial. Harnessing patient feedback data: A challenge for policy and service improvement. Digital Health 2015;1 DOI: 10.1177/2055207615617910

Harvey J, Dopson S, McManus RJ, and Powell J. 2015. Factors influencing the adoption of self-management solutions: an interpretive synthesis of the literature on stakeholder experiences. Implementation Science. 10:159

Lowson K, Jenks M, Filby A, Carr L, Campbell B, Powell J. Examining the implementation of NICE Guidance: cross-sectional survey of the use of NICE interventional procedures guidance by NHS Trusts. Implementation Science. 2015;10:93.

Balatsoukas P, Kennedy CM, Powell J, Buchan I, Ainsworth J. The Role of Social Network Technologies in Online Health Promotion: a Narrative Review of Theoretical and Empirical Factors Influencing Intervention Effectiveness. Journal of Medical Internet Research 2015;17:e141.

Rodas-Perez MC, Clarke A, Powell J, Thorogood M. Challenges for providing genetic counselling in Colombian genetic clinics - the viewpoint of the physicians providing genetic consultations. Journal of Community Genetics 2015;6:301-311.

Powell J, Arvanitis Tn. Welcome to the Digital Health revolution. Digital Health. 2015. Published January 1, 2015.DOI: 10.1177/2055207614561571

Taylor-Phillips S., Clarke A., Grove AL., Swan J., Parsons H., Gkeredakis E., Mills P., Powell J., Nicolini D., Roginski C. and Scarbrough H. Coproduction in commissioning decisions : is there an association with decision satisfaction for commissioners working in the NHS? A cross-sectional survey 2010/2011" BMJ Open 2014;4 Article number e004810

Devi R, Powell J, Singh S. A Web-Based Program Improves Physical Activity Outcomes in a Primary Care Angina Population: Randomized Controlled Trial. Journal of Medical Internet Research. 2014;16(9):e186.

Devi R, Carpenter C, Powell J, Singh S. Exploring the experience of using a web-based cardiac rehabilitation programme in a primary care angina population: a qualitative study. International Journal of Therapy and Rehabilitation. 2014;21(9):434-440.

Poote A, French D, Dale J, Powell J. Automated self-assessment in a primary care student health centre setting: A cross-sectional study. Journal of Telemedicine and Telecare. 2014 Apr;20(3):123-7. doi: 10.1177/1357633X14529246.

Nicolini D, Powell J, Korica M. Keeping knowledgeable: how NHS chief executive officers mobilise knowledge and information in their daily work. Health Services and Delivery Research 2014;2(26)

Scarbrough H, D'Andreta D, Evans S, Marabelli M, Newell S, Powell J, Swan J. Networked innovation in the health sector: comparative qualitative study of the role of Collaborations for Leadership in Applied Health Research and Care in translating research into practice. Health Services and Delivery Research 2014;2(13). DOI: 10.3310/hsdr02130.

Keltie K, Cole H, Arber M, Patrick H, Powell J, Campbell B, Sims A. Identifying complications of interventional procedures from UK routine healthcare databases: a systematic search for methods using clinical codes.  BMC Medical Research Methodology 2014;14:126. doi:10.1186/1471-2288-14-126.

Craig J, Mahon J, Yellowlees A, Barata T, Glanville J, Arber M, Mandava L, Powell J, Figueiredo F. Epithelium off Photochemical Corneal Collagen Cross-Linkage Using Riboflavin and Ultraviolet A for Keratoconus and Keratectasia: A Systematic Review and Meta-Analysis. The Ocular Surface. 2014 12(3):202-14. doi: 10.1016/j.jtos.2014.05.002..

Powell J, Hamborg T, Burls A, Stallard N, McSorley J, Bennett K, Griffiths K, Christensen H. The PsyWell study: Randomised Controlled Trial of an intervention to improve mental wellbeing in the general population. Journal of Medical Internet Research. 2013;15(1):e2

Raftery JP, Powell J. Health Technology Assessment in the UK. Lancet 2013;382 (9900):1278-85.

Mazanderani F, Locock L, Powell J. Biographical Value: towards the conceptualisation of the ‘commodification’ of illness narratives in contemporary health care. Sociology of Health & Illness. 2013 Jul;35(6):891-905. doi: 10.1111/1467-9566.12001.

Mazanderani FH, O'Neill B, Powell J. “People power” or “pester power”? YouTube as a forum for the generation of evidence and patient advocacy. Patient Education & Counseling 2013;93(3):420-425.

Todkill T, Powell J. Participant experiences of an internet-based intervention and randomised control trial: interview study. BMC Public Health 2013;13:1017 doi:10.1186/1471-2458-13-1017

Clarke A, Taylor-Phillips S, Swan J, Gkeredakis E, Mills P, Powell J, Nicolini D, Roginski C, Scarbrough H, Grove A. Evidence-based commissioning in the English NHS. Who uses which sources of evidence? A survey 2010/2011. BMJ Open 2013;3:e002714 doi:10.1136/bmjopen-2013-002714.

Mavrodaris A, Powell J, Thorogood M. The prevalence of dementia and cognitive impairment among older people in sub-Saharan Africa: A systematic review. Bulletin of the World Health Organization 2013;91:773-783.

Kwon JH, Powell J, Chalmers A. How Level of Realism Influences Anxiety in Virtual Reality Environments for a Job Interview. International Journal of Human-Computer Studies. 2013;71(10)978-987.

Maheswaran H, Weich S, Powell J, Stewart-Brown S. Evaluating the responsiveness of the Warwick Edinburgh Mental Well-Being Scale (WEMWBS): Group and individual level analysis. Health and Quality of Life Outcomes. 2012, 10:156 doi:10.1186/1477-7525-10-156.

Powell J, Hamborg T, Stallard N, Burls A, McSorley J, Bennett K, Griffiths K, Christensen H. Effectiveness of an internet-delivered cognitive-behavioural aid to improve mental wellbeing: a randomised controlled trial. Lancet 2012;380:S3 (peer-reviewed abstract).

O’Neill B, Mazanderani F, Powell J. ‘People power’ or ‘Pester power’? YouTube, multiple sclerosis, and the ‘liberation procedure’. Lancet 2012;380:S20 (peer-reviewed abstract).

Swan J, Clarke A, Nicolini D, Powell J, Scarbrough H, Roginski C, Gkeredakis E, Mills P, Taylor-Phillips S. Evidence in Management Decisions – Advancing Knowledge Utilisation in Healthcare Management. Final Report. NIHR Health Services Delivery and Organisation Programme. 2012.

Powell J, Boden S. Greater choice and control? Health policy and the online health consumer. Policy & Internet. 2012;4(2):1-23.

Locock L, Mazanderani F, Powell J. Metaphoric language and the articulation of emotions by people affected by motor neurone disease. Chronic Illness. 2012;8(3):201-13.

Kennedy C, Boyd A, Payne T, Powell J, Buchan I. Active Assistance Technology for Health-Related Behaviour Change: a Literature Review. Journal of Medical Internet Research. 2012;14(3):e80.

Mazanderani F, Locock L, Powell J. Being differently the same: the mediation of identity tensions in the sharing of illness experiences. Social Science & Medicine 2012;74(4): 546-553.

Piette JD, Lun KC, Moura LA, Fraser HSF, Mechael PN, Powell J, Khoja SR. Impacts of eHealth on Health Outcomes, Services, and Systems. Bulletin of the World Health Organisation. 2012;90:365-372.

Morrison LG, Yardley L, Powell J, Michie, S. What design features are used in effective ehealth interventions? A review using techniques from Critical Interpretive Synthesis. Telemedicine and ehealth. 2012;18(2), 137-144.

Armstrong N, Koteyko N, Powell J. “Oh dear, should I really be saying that on here?” Issues of identity and authority in an online diabetes community. Health: An Interdisciplinary Journal for the Social Study of Health, Illness and Medicine. 2012;16(4):347-365.

Metcalfe D, Powell J. Should doctors spurn Wikipedia? Journal of the Royal Society of Medicine. 2011;104:488-489.

Gkeredakis E, Swan J, Powell J, Nicolini D, Scarbrough H, Roginski C, Taylor-Phillips S, Clarke A. Mind the Gap: Understanding Utilisation of Evidence and Policy in Healthcare Management Practice. Journal of Health Organisation and Management. 2011;25:298-314.

Devi R, Powell J, Singh S, Rees K. Cochrane Protocol: Internet-based interventions for the secondary prevention of heart disease. Cochrane Database of Systematic Reviews. 2011.

Powell J. Young people, self-harm and internet forums: Commentary on... Online discussion forums for young people who self-harm. The Psychiatrist. October 2011 35:368-370.

Powell J, Inglis N, Ronnie J, Large S. The characteristics and motivations of online health information seekers: cross-sectional survey and qualitative interview study. J Med Internet Res 2011;13(1):e20.

Sutcliffe P, Martin S, Sturt J, Powell J, Griffiths F, Adams A, Dale J. Systematic review of communication technologies to promote access and engagement of young people with diabetes into healthcare. BMC Endocrine Disorders 2011;11:1.

Martin S, Sutcliffe P, Griffiths F, Sturt J, Powell J, Adams A, Dale J. Effectiveness and impact of networked communication interventions in young people with mental health conditions: A systematic review. Patient Education and Counseling 2011;85:108-119.

Metcalfe D, Price C, Powell J. Media coverage and public reaction to a celebrity cancer diagnosis. Journal of Public Health. 2011;33(1):80-85.

Scarle S, Dunwell I, Bashford-Rogers T, Selmanovic E, Debattista K, Chalmers A, Powell J, Robertson W. Complete motion control of a serious game against obesity in children. VS-GAMES '11 Proceedings of the 2011 Third International Conference on Games and Virtual Worlds for Serious Applications. 178-179.

Powell J, Gunn K, Griffiths F, Lowe P, Clarke A, Sheehan B. The role of networked technology in dementia care: interview study. Ageing and Society 2010;30:1073-1088.

Powell J. Acting on Evidence. British Medical Journal. 2010;341:c5168.

Lowe P, Powell J, Griffiths F, Thorogood M, Locock L. Making it all normal: the role of the internet in problematic pregnancy. Qualitative Health Research. 2009;19(10): 1476-1484.

Armstrong N, Powell J. Patient perspectives on health advice posted on internet discussion boards: a qualitative study. Health Expectations. 2009;12(3):313-320.

Jennings A, Powell J, Armstrong N, Sturt J, Dale J. A Virtual Clinic for Diabetes Self-Management: Pilot Study. Journal of Medical Internet Research 2009;11(1):e10.

Raftery J, Kerr C, Hawker S, Powell J. Paying clinicians to join clinical trials: a review of guidelines and interview study of trialists. Trials 2009;10-15.

Kwon JH, Chalmers A, Czanner S, Czanner G, Powell J. A Study of Visual Perceptions: Social Anxiety and Virtual Realism. Journal of ACM SIGGRAPH 2009.

Powell J, Jennings A, Armstrong N, Sturt J, Dale J. Pilot study of a virtual diabetes clinic: satisfaction and usability. Journal of Telemedicine and Telecare. 2009;15(3): 150—152.

Nicolini D, Powell J, Conville P, Martinez-Solano L. Managing knowledge in the healthcare sector. A review. International Journal of Management Reviews. 2008; 10(3):245-263.

Armstrong N, Powell J. Preliminary test of an Internet-based diabetes self-management tool. Journal of Telemedicine and Telecare 2008;14(3):114-116.

Powell J, Chiu T, Eysenbach G. A systematic review of networked technologies supporting carers of people with dementia. Journal of Telemedicine and Telecare 2008;14(3):154-156.

Fazel S, Xenitidis K, Powell J. The prevalence of intellectual disabilities among 12 000 prisoners - a systematic review. International Journal of Law and Psychiatry. 2008;31(4):369-373.

Rodas Perez MC, Powell J, Thorogood M, Prieto J, Zarante I. Clinician-patient interaction during genetic consultation and counselling - Case study in five genetics in Colombia. European Journal of Human Genetics 2008;16 Suppl 2:455-456.

Raftery J, Bryant J, Powell J, Kerr C, Hawker S. Payment to healthcare professionals for patient recruitment to trials: systematic review and qualitative study. Health Technology Assessment. 2008;12(10):1–128.

Armstrong N, Powell J, Hearnshaw H, Dale J. Design Issues in a Trial of an Internet-Based Self-Management System for Diabetes.  Journal of Telemedicine and Telecare 2007;13(s1):1-2.

Powell J, Clarke A. Investigating internet use by mental health service users: interview study. Studies in Health Technology and Informatics 2007;129.

Armstrong N, Hearnshaw H, Powell J, Dale J. Stakeholder Perspectives on the Development of a Virtual Clinic for Diabetes Care: Qualitative Study. Journal of Medical Internet Research 2007;9(3):e23 <URL:>

Powell J. Involving users in ehealth research. Proceedings of the 11th World Congress on the Internet in Medicine (MedNet), Toronto, October 2006. 

Powell J, Clarke A. Information in mental health: qualitative study of mental health service users. Health Expectations 2006;9:359-365.

Powell J, Clarke A. Internet information seeking in mental health: population survey. British Journal of Psychiatry 2006;189:273-277.

Powell J, Fitton R, Fitton C. Sharing electronic health records: the patient view. Informatics in Primary Care 2006;14:55-57.

Griffiths F, Lindenmeyer A, Powell J, Lowe P, Thorogood M. Why Are Health Care Interventions Delivered Over the Internet? A Systematic Review of the Published Literature. Journal of Medical Internet Research 2006;8(2):e10

Powell J, Clarke A. Connected for health: Public use of the internet for mental health information. European Journal of Epidemiology 2006;21(suppl S):91.

Bryant J, Powell J. Payment to healthcare professionals for patient recruitment to trials: a systematic review. British Medical Journal 2005;331:1377-1378.

Powell J, Lowe P, Griffiths FE, Thorogood M.  A critical analysis of the literature on the internet and consumer health information.  Journal of Telemedicine & Telecare 2005;11(s1):41-43.

Powell J, Buchan I. Electronic health records should support clinical research. Journal of Medical Internet Research 2005;7(1):e4.

Eysenbach G, Powell J, Englesakis M, Rizo C, Stern A. Health related virtual communities and electronic support groups: a systematic review of the effects of online peer to peer interactions. British Medical Journal 2004;328:1166-1170.

Powell J, McCarthy N, Eysenbach G. Cross-sectional survey of users of Internet depression communities. BMC Psychiatry. 2003;3:19.

Powell J, Darvell M, Gray JAM. The doctor, the patient and the world-wide web: how the internet is changing healthcare. Journal of Royal Society of Medicine 2003;96:74-76.

Powell J, Clarke A. “Thank goodness I’m not as mad as I thought I was”. An investigation of the use of the internet by people with mental health problems. Journal of Epidemiology and Community Health 2003;58(suppl 2):A9.

Eysenbach G, Powell J, Kuss O, Sa E-R. Empirical studies assessing the quality of health information for consumers on the World Wide Web. A Systematic Review. JAMA - Journal of the American Medical Association 2002;287:2691-2700.

Powell J, Clarke A. The WWW of the World Wide Web: Who, What, and Why? Journal of Medical Internet Research 2002;4(1):e4.

Powell J. Systematic review of outreach clinics in primary care. Journal of Health Services Research & Policy 2002;7:177-183.

Powell J, Geddes J, Deeks J, Goldacre M, Hawton K. Suicide in psychiatric hospital inpatients: a case-control study of risk factors. British Journal of Psychiatry 2000;176:266-272.

Powell J. Audit of referrals to an old age psychiatry liaison service. Auditorium 1997;6:24-25. (winner of Lundbeck Audit Prize 1997)


Book chapters:

Powell J, van Velthoven M. Analysing digital data. Forthcoming in Pope C, Mays N. Qualitative Research in Health Care (4th Edition). Wiley, 2018.

Mazanderani FH, Powell J. Analysing patients’ experiences on the internet. In Ziebland S, Calabrese J, Coulter A, Locock L. Understanding and using experiences of health and illness. Oxford: OUP. 2013.

Powell J. Ehealth promotion. In Thorogood M, Coombes Y (eds.), Evaluating Health Promotion. 2nd Edition. Oxford: OUP. 2010.

Clarke A, Powell J, Lansang MA. Needs assessment: a practical approach. In Detels R, Beaglehole R, Lansang MA, Gulliford M (eds.), Oxford Textbook of Public Health. 5th Edition. Oxford: OUP. 2009.

Powell J. Ehealth. In Currie W, Finnegan D (eds.), Integrating healthcare with ICT. Oxford: Radcliffe Publishing. 2009.

Powell J, Armstrong N. Involving Patients and the Public in Ehealth Research. In Wilson V (ed.), Patient-Centred Ehealth. Hershey, PA: IGI Publishing. 2008.

Powell J. Networked carers: digital exclusion or digital empowerment? In Loader BD, Hardey M, Keeble L (eds.), Digital Welfare for the Third Age. London: Routledge. 2008.


I was a contributor to two Nuffield Trust publications on Electronic Health Records, and a recent Royal Society of Public Health report on social media and young people’s mental health and wellbeing:

Critical Issues for Electronic Health Records – Considerations from an expert workshop (Edited by Singleton P, Pagliari C, and Detmer DE.). London: Nuffield Trust. 2009.

Electronic Personal Health Records – Emergence and implications for the UK. (Edited by Pagliari C, Detmer DE, and Singleton P.) London: Nuffield Trust. 2007.

#Statusofmind: Social media and young people’s mental health and wellbeing. London: Royal Society of Public Health. 2017.