21st Armitage Workshop and Lecture

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• Christopher Jennison, University of Bath
• Tuesday 12 November 2024, 09:20-17:00
• Cancer Research UK Cambridge Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE.

If you have a question about this talk, please contact Alison Quenault.

To register, please go to: https://onlinesales.admin.cam.ac.uk/conferences-and-events/mrc-biostatistics-unit/armitage-lecture-workshop/21st-armitage-workshop-and-lecture-november-2024

In a sequentially designed experiment, data are evaluated as they are collected and sampling is stopped as soon as the required amount of information is reached or the outcome of a hypothesis test is determined. Formal use of sequential methods dates back to the 1920s and applications of statistical quality control in manufacturing processes. Methods were developed further during the second world war with the work of Abraham Wald in the USA and George Barnard in the UK. Peter Armitage led the way in transferring sequential methods to medical studies and, after several journal articles, published the book “Sequential Medical Trials” in 1960. Key features of medical studies, as opposed to industrial experiments, are the restriction to a small number of interim analyses and a modest limit on the maximum sample size. These practical requirements led to methods based on the precise numerical computations that Peter Armitage and his co-authors presented in the 1960s. In my talk, I shall survey the many directions in which sequential methods for clinical trials have developed over the past 60 years. Topics such as optimal design, response adaptive randomisation, and inference on termination of a sequential trial were already studied by Armitage. Other topics, in particular adaptive designs with multiple hypothesis testing, have emerged more recently. Peter Armitage made immense contributions to the development of methodology for clinical trials: it will be my privilege and my pleasure to describe Peter’s role in the history of this subject.

This talk is part of the MRC Biostatistics Armitage Workshops and Lectures series.

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• Cancer Research UK Cambridge Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE

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