Professor Mark Strong

BSc MB ChB MPH MSc PhD MRCPCH MFPH FHEA CStat

School of Health and Related Research

Professor of Public Health

Deputy Dean of ScHARR

Professor Mark Strong
m.strong@sheffield.ac.uk
+44 114 222 0812

Full contact details

Professor Mark Strong
School of Health and Related Research
Regent Court (ScHARR)
30 Regent Street
Sheffield
S1 4DA
Profile

PA: Karen Johnson 

Email: karen.johnson@sheffield.ac.uk 

Phone: +114 222 0757

I am an academic public health doctor and a statistician, and currently Deputy Dean of ScHARR.

Check out our web-app - SAVI - Sheffield Accelerated Value of Information

This web-app lets you calculate Expected Value of (Partial) Perfect Information for any cost-effectiveness model. Just upload the probabilistic sensitivity analysis sample and the app does the rest.

SAVI is now available as an R package from GitHub. This allows users to run the SAVI app on their own machine, and removes the need to transfer any data over the net. Installation instructions.

For more resources that relate to Value of Information, see our Collaborative Network for Value of Information (CONVOI) website.

Current and recent projects

  • Calibrated Agent Simulations for Combined Analysis of Drinking Etiologies (CASCADE): A US National Institutes of Health funded project on alcohol consumption (2016-2021). PI - Robin Purshouse.
  • Systems Science in Public Health and Health Economic Research (SIPHER): A major UK Prevention Research Partnership funded project that will generate evidence for healthy public policy through a systems-science approach (2019-2024). PI - Petra Meier.
Research interests

I have three related research interests that fall under the general banner of Uncertainty Quantification:

  1. How do we properly account for all relevant uncertainties when we build a computer model of a physical, biological or social system?
  2. How do we (efficiently) compute value of information?
  3. How do we work out the value of a computer model? How much should we pay to make a simple model more complex? When do we stop increasing the complexity of a model?

Jeremy OakleyJim Chilcott and I have proposed an "internal" discrepancy-based method for managing model uncertainty. See this paper in JRSS Series C, and this paper in SIAM/ASA Journal of Uncertainty Quantification that develops the idea of the 'Expected Value of Model Improvement'. The method is discussed in more detail in my PhD thesis.

We have proposed an efficient method for computing partial EVPI. This method works for any number of parameters of interest and requires only the PSA sample. See this open access paper in Medical Decision Making. R functions to implement the method can be downloaded here. This paper uses Gaussian process-based methods that are nicely described in the  Managing Uncertainty in Complex Models (MUCM) toolkit.

The partial EVPI method extends nicely to the computation of EVSI. See here for our open access paper on the efficient computation of EVSI.

Publications

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Journal articles

All publications

Journal articles

Conference proceedings papers

Posters

  • Kritsotakis E, Castilla-Fernandez G & Strong M (2017) Modelling recurrent event data: a comparison of the Cox proportional hazards model and three of its extensions to estimate the risk of recurrent healthcare-associated infections. Sixth Annual Survival Analysis for Junior Researchers. RIS download Bibtex download
  • Tosh J, Stevenson M, Akehurst R & Strong M (2014) A Framework for the Economic Evaluation of Sequential Therapies for Chronic Conditions (2014). ISPOR. RIS download Bibtex download
  • Barnes A, Black M, Baxter S, Furber A, Strong M, Beynon C, Dallat M, Jeffery C, Davies AR, Goyder E , Kritsotakis E et al Understanding public health systems: a participatory systematic review and systems infographic. RIS download Bibtex download
  • Black M, Barnes A, Creative NF, Baxter S, Jeffrey C, Dallat M, Beynon C, Furber A, Strong M, Davies A , Goyder E et al Early Years Policy in the UK - from the child’s perspective. RIS download Bibtex download

Other

Research group

PhD students

Teaching interests

I teach on the Master in Public Health and undergraduate medical MB ChB degrees, and offer MFPH exam support to the Yorkshire and Humber public health training scheme.

PhD opportunities

I welcome PhD applications at any time. You are welcome to email me to discuss an idea before making an application through the ScHARR online system. I supervise students who are interested in the topics of Value of Information and Uncertainty Quantification in health economic decision making.

Professional activities

I am an honorary clinical consultant in public health at Public Health England.

I am an Associate Editor at Medical Decision Making.

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