Institute of Epidemiology & Health Care


Dan Lewer

Dan Lewer picture

My PhD Title: Improving physical healthcare for people who use heroin and crack cocaine

Supervisor: Professor Andrew Hayward

Lay summary: My project aims to improve physical healthcare for people who use heroin and crack cocaine. At the moment, many people in this group do not receive timely treatment despite having higher risk of many long-term conditions such as respiratory and cardiovascular diseases. I will use healthcare records to understand which specific aspects of healthcare need to be improved most urgently, and also engage with drug and alcohol services to co-design models of care.

My Background

I am a public health registrar and have worked in various health promotion and health protection roles. While working at Public Health England I investigated an increase in serious bacterial infections among people who inject drugs, which led to my current research project.


Faculty of Public Health Membership exams (parts A & B)

MSc Public Health (London School of Hygiene and Tropic Medicine)

PG Cert Psychiatric Research (Kings College London)

BSc International Relations (LSE)


  • Aldridge, R. W., Menezes, D., Lewer, D., Cornes, M., Evans, H., Blackburn, R. M., Hayward, A. (2019). Causes of death among homeless people: a population-based cross-sectional study of linked hospitalisation and mortality data in England. Wellcome Open Res, 4, 49. doi:10.12688/wellcomeopenres.15151.1
  • Lewer, D., Tweed, E. J., Aldridge, R. W., & Morley, K. (2019). Causes of hospital admission and mortality among people who use heroin: a cohort study comparing relative and absolute risks. Drug and Alcohol Dependence. doi:10.1016/j.drugalcdep.2019.06.027
  • Lewer, D., Aldridge, R. W., Menezes, D., Sawyer, C., Zaninotto, P., Dedicoat, M., Story, A. (2019). Health-related quality of life and prevalence of six chronic diseases in homeless and housed people: a cross-sectional study in London and Birmingham, England. BMJ Open, 9 (4), e025192. doi:10.1136/bmjopen-2018-025192
  • Aldridge, R. W., Story, A., Hwang, S. W., Nordentoft, M., Luchenski, S. A., Hartwell, G., Hayward, A. C. (2017). Morbidity and mortality in homeless individuals, prisoners, sex workers, and individuals with substance use disorders in high-income countries: a systematic review and meta-analysis. Lancet (London, England). doi:10.1016/s0140-6736(17)31869-x
  • Lewer, D., Harris, M., & Hope, V. (2017). Opiate Injection-Associated Skin, Soft Tissue, and Vascular Infections, England, UK, 1997-2016. EMERGING INFECTIOUS DISEASES, 23 (8), 1400-1403. doi:10.3201/eid2308.170439
  • Blackburn, R. M., Hayward, A., Cornes, M., McKee, M., Lewer, D., Whiteford, M., Aldridge, R. W. (2017). Outcomes of specialist discharge coordination and intermediate care schemes for patients who are homeless: analysis protocol for a population-based historical cohort. BMJ open, 7 (12), e019282. doi:10.1136/bmjopen-2017-019282
  • Lewer, D., McKee, M., Gasparrini, A., Reeves, A., & de Oliveira, C. (2017). Socioeconomic position and mortality risk of smoking: evidence from the English Longitudinal Study of Ageing (ELSA). European Journal of Public Health. doi:10.1093/eurpub/ckx059
  • Lewer, D., Meier, P., Beard, E. V., Sadie, B., & Kaner, E. (2016). Unraveling the alcohol harm paradox: a population-based study of social gradients across very heavy drinking thresholds. BMC Public Health.
  • 2015
  • Lewer, D., O'Reilly, C., Mojtabai, R., & Evans-Lacko, S. (2015). Antidepressant use in 27 European countries: associations with sociodemographic, cultural and economic factors. BRITISH JOURNAL OF PSYCHIATRY, 207 (3), 221-226. doi:10.1192/bjp.bp.114.156786

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