Professor David Torgerson


Contact Details

Tel: 44 (0)1904 321340
Fax: 44 (0)1904 321388
Department of Health Sciences
University of York


MSc Health Services Research (Hull)
Diploma in Health Economics (Tromso)
PhD Public Health Medicine (Aberdeen)

2004 – Present, Professor & Director of York Trials Unit.
2002  - 2004, Reader & Director of York Trials Unit, Department of Health Sciences.
2000 – 2002 Reader, Department of Health Sciences and Centre for Health Economics, York.
1997-1999 – Senior Research Fellow, Department of Health Studies and Centre for Health Economics, York.
1995-1997 – Research Fellow, Centre for Health Economics, York.
1990-1995 – Research Fellow, Health Economic and Health Services Research Units, Aberdeen.
1989-1990 – Research Associate, University of Birmingham.

Research Interests
Design and conduct of randomised trials; health economics; osteoporosis; menopause.
Methodological interests include: cluster randomised trials; patient preference trials; pragmatic randomised trials.

Book on randomised trials




Ongoing Randomised Trials


Annual York Conference on Randomised Trials in the Social Sciences


Conference Flyer


I am Experimental Evaluation module leader for the MSc in Health Sciences and also give a lecture on trials for the MSc in Forensic Psychology. I am also joint module leader for What Works for the BSc in Social Policy.

I also present 1 day courses on trial design


Medical students SSC on Randomised trials



Copies of power point slides for 1 day University of Ulster course are here.

Recruitment to trials

External validity

Unequal allocation

Cost of trials



Zelen's method


Sample size and analysis

Pragmatic Trials

Placebo Trials

Preference Trials

Cluster Trials

Sources of bias in trials

Allocation methods

Before and after slides

Observational Studies