I am currently Professor of Medical Statistics and the Director of the Centre for Health Care Randomised Trials (CHaRT) which is the Clinical Trials Unit embedded within the Health Services Research Unit. My overarching research interest is in designing fair tests of health care treatments and policies, with a specifc interest in evaluating surgical and complex interventions. I'm also interested in improving the design, conduct, and analysis and reporting of clinical trials through the development and application of methodological research to clinical trials from CHaRT.
My undergrad degree is in Mathematics from the University of Aberdeen, graduating in 1997. After a year training as a Mathematics teacher I joined the Unit in September 1998 as a statistician. I studied part-time for an MSc in Applied Statistics with Sheffield Hallam University, graduating in 2004. In 2008 I was appointed Senior Statistican, and in 2016 was I Interim Programme Director for the Health Care Assessment Programme, until being appointment as CHaRT Director in April 2017.
The application of statistical methods to clinical trials. Recent example is JCE paper available here on using instrumental variables in a surgery trial to address non-compliance. Collaborators were Jonathan Cook (Oxford), Tom Palmer (Lancaster), and Richard Emesley (Manchester).
Research on making trials more efficient, collaborating with Trial Forge.
Current Research
A complete list of the CHaRT RCT portolio is available by clicking here
Economic evaluation of surgical treatments for women with stress urinary incontinence: a cost-utility and value of information analysis
Javanbakht, M., Moloney, E., Brazzelli, M., Wallace, S., Ternent, L., Omar, M. I., Monga, A., Saraswat, L., Mackie, P., Becker, F., Imamura, M., Hudson, J., Shimonovich, M., MacLennan, G., Vale, L., Craig, D.
IDENTIFY: The investigation and detection of urological neoplasia in patients referred with suspected urinary tract cancer: A multicentre cohort study
Khadhouri, S., Gallagher, K. M., MacKenzie, K., Shah, T. T., Gao, C., Moore, S., Zimmermann, E., Edison, E., Jefferies, M., Nambiar, A., MacLennan, G., McGrath, J. S., Kasivisvanathan, V., IDENTIFY Protocol Collaborators Group
International Journal of Surgery Protocols, vol. 21, pp. 8-12
Practical help for specifying the target difference in sample size calculations for RCTs: The DELTA2 five-stage study, including a workshop
Cook, J. A., Julious, S. A., Sones, W., Hampson, L. V., Hewitt, C., Berlin, J. A., Ashby, D., Emsley, R., Fergusson, D. A., Walters, S. J., Wilson, E. C., Maclennan, G., Stallard, N., Rothwell, J. C., Bland, M., Brown, L., Ramsay, C. R., Cook, A., Armstrong, D., Altman, D., Vale, L. D.
Laparoscopic supracervical hysterectomy versus endometrial ablation for women with heavy menstrual bleeding (HEALTH): a parallel-group, open-label, randomised controlled trial
Cooper, K., Breeman, S., Scott, N. W., Scotland, G., Clark, J., Hawe, J., Hawthorn, R., Phillips, K., MacLennan, G., Wileman, S., McCormack, K., Hernández, R. A., Norrie, J., Bhattacharya, S., HEALTH Study Group
Five-Year Outcomes of a Randomized Trial of Treatments for Varicose Veins
Brittenden, J., Cooper, D., Dimitrova, M., Scotland, G., Cotton, S. C., Elders, A., MacLennan, G., Ramsay, C. R., Norrie, J., Burr, J. M., Campbell, B., Bachoo, P., Chetter, I., Gough, M., Earnshaw, J., Lees, T., Scott, J., Baker, S. A., Tassie, E., Francis, J., Campbell, M. K.
The New England Journal of Medicine, vol. 381, no. 10, pp. 912-922
Photodynamic versus white light-guided treatment of non-muscle invasive bladder cancer: A study protocol for a randomised trial of clinical and cost-effectiveness
Tandogdu, Z., Lewis, R., Duncan, A., Penegar, S., McDonald, A., Vale, L., Shen, J., Kelly, J. D., Pickard, R., N Dow, J., Ramsay, C., Mostafid, H., Mariappan, P., Nabi, G., Creswell, J., Lazarowicz, H., McGrath, J., Taylor, E., Clark, E., Maclennan, G., Norrie, J., Hall, E., Heer, R.
The clinical and cost-effectiveness of total versus partial knee replacement in patients with medial compartment osteoarthritis (TOPKAT): 5-year outcomes of a randomised controlled trial
Beard, D. J., Davies, L. J., Cook, J. A., MacLennan, G., Price, A., Kent, S., Hudson, J., Carr, A., Leal, J., Campbell, H., Fitzpatrick, R., Arden, N., Murray, D., Campbell, M. K., TOPKAT Study Group
Study protocol for a randomised controlled trial of CBT vs antipsychotics vs both in 14-18-year-olds: Managing Adolescent first episode Psychosis: a feasibility study (MAPS)
Pyle, M., Broome, M. R., Joyce, E., MacLennan, G., Norrie, J., Freeman, D., Fowler, D., Haddad, P. M., Shiers, D., Hollis, C., Smith, J., Liew, A., Byrne, R. E., French, P., Peters, S., Hudson, J., Davies, L., Emsley, R., Yung, A., Birchwood, M., Longden, E., Morrison, A. P.
