The Bradford-Hill Memorial Lecture, this year organised jointly between the London School of Hygiene and Tropical Medicine and the RSS Medical Section, will be given by David Clayton TOMORROW, Tuesday 23 May, at 5pm in the Goldsmith's Lecture Theatre, London School of Hygiene and Tropical Medicine, Keppel Street, LONDON. Directions to the school can be found at http://www.lshtm.ac.uk/prospectus/general/findus.htm All welcome. DAVID CLAYTON (MRC Biostatistics Unit, Cambridge) Biostatistics, epidemiology, and the post-genome challenge The statistical principles underlying the design and analysis of epidemiological studies of the causes of disease were, for the most part, rigorously established more than a quarter of a century ago. Despite many successes, some have suggested that the methods of epidemiology are insufficiently accurate for the study of small effects of exposures which are difficult to measure in free-living populations. The emergence of the discipline of genetic epidemiology and of the emerging technologies for high-throughput genotyping have introduced a new element to this debate. This lecture will review the implications of established statistical knowledge for the design and analysis of studies of the genetic causes of complex diseases, and of gene-gene and gene-environment interaction. The role for very large cohort studies will be critically reviewed. Dr Keith R. Abrams Senior Lecturer in Medical Statistics Department of Epidemiology & Public Health University of Leicester 22-28 Princess Road West Leicester, U.K. LE1 6TP Tel +44 (0)116 252 3217 FAX +44 (0)116 252 3272 e-mail [log in to unmask] WWW http://www.prw.le.ac.uk/epidemio/ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%