Forthcoming events


23rd April

Introduction to TwiCs within hospitals and other settings

Pragmatic Clinical Trials Unit, Queen Mary University of London 


27th March

Linking long-term longitudinal studies and RCTs

Royal Statistical Society, London

Past events

28th January 2021

Introduction to Trials within Cohorts online webinar

Health Research Board - Trials Methodology Research Network (HRB-TMRN) Ireland


23rd May 2019

Symposium on the efficiency and analysis of Trials within Cohorts

Wellcome Trust, London


7th March 2017

OSSU Workshop on Pragmatic Trials – Trials within Cohorts (TwiCs/ cmRCT) designs for simple efficient pragmatic trials

Clare Relton

Population Health Research Institute (McMaster University), Toronto, Canada


27th January 2017

MRC HTMR Trial Conduct Working Group Webinar – What are TwiCs? And how are they being used?

Clare Relton



7-8th November 2016 

2nd International TwiCs Symposium – Ethics of 'Trials within Cohorts' (TwiCs)

Wellcome Trust, London, UK

Presentations and slides and published report


13th July 2016

HSR (Health Services Research) UK Symposium – The innovative 'cohort multiple RCT' design: examples from UK research

Relton C, Holding E, Bower P, Barber S and Brown L

Nottingham Conference Centre, UK

Oral presentation (pdf) and poster presentation (pdf)


16-18th November 2016

3rd international Clinical Trials Methodology Conference – Review of an innovative approach to practical trials: the ‘cohort multiple RCT’ design

Relton C, Thomas K, Nicholl J and Uher R


Poster presentation (pdf)


10-11th November 2014

1st  International 'Trials within Cohorts' (TwiCs) symposium

London School of Hygiene and Tropical Medicine, London

Contact Us

© 2018 Trials within Cohorts


Supported by a Wellcome Trust grant and the NIHR CLAHRC for Yorkshire & Humber