Stephen has over 20 years worth of experience of designing, analysing and reporting the results of a variety of studies including randomised controlled trials, observational studies and surveys. He has been an author or co-author on over 200 publications (including 118 in refereed journals and 4 books). His research interests include: design, analysis and interpretation of studies with Health Related Quality of Life (HRQoL) outcome measures; computer intensive methods – the bootstrap; Health Services Research and Technology Assessment; cluster RCTs and clustering by health professional in individually randomised trials and study design and sample size determination.

Stephen has developed several courses on teaching medical statistics to medical and health science students, clinicians and allied health professionals. He has also co-authored four textbooks: ‘Medical Statistics: A Textbook for the Health Sciences’; ‘How to Display Data’; ‘How to Design, Analyse and Report Cluster Randomised Trials in Medicine and Health Related Research’ and ‘Quality of Life Outcomes in Clinical Trials and Health-Care Evaluation’.