Barts and The London School of Medicine and Dentistry Spacer image Spacer image

Professor Sandra Eldridge, BA, MSc, PhD
Professor of Biostatistics, Joint Centre Lead

Tel: 13 2519
Fax: +44 20 7882 2552
Location: Whitechapel, Abernethy Building, 1.20

Sandra gained a degree in Mathematics from Oxford University in 1979. She then spent two years teaching mathematics in secondary schools, first in Nigeria with Voluntary Service Overseas, then in the UK. In 1982 she completed an MSc in Medical Demography at the London School of Hygeine and Tropical Medicine where she worked for several years before moving to London Metropolitan University (formerly City of London Polytechnic) to teach undergraduate statistics. She joined Queen Mary as a lecturer in medical statistics in 1994, working predominantly in primary care. She developed an interest in cluster randomised trials and completed a doctorate focusing on these trials in 2005. She currently carries out methodological research on cluster randomised trials, collaborative research with colleagues at the Institute for Health Sciences, within the Barts and the London Medical school and more widely, as well taking the lead in several postgraduate teaching modules. She was instrumental in setting up the Royal Statistical Society Primary Health care study group in 2002. In 2006 she was promoted to Reader, and in 2007 to Professor. She is currently joint Centre Lead, Institute postgraduate tutor and director of the pragmatic clinical trials unit which was recently awarded full registration by UKCRC.

Research interests:

Sandra's main research interests are cluster randomised trials and complex interventions. She has published the largest and most comprehensive review of the methodology of cluster randomised trials to date, and a paper describing practical ways of allowing for variable cluster size in sample size calculations for cluster randomised trials. More recently she has become interested in developing methods to improve the design of cluster randomised trials of complex interventions, specifically methods of modelling available data in pilot studies to try and identify weaknesses in putative interventiions, and she is now leading the development of a collaborative group to explore this methodology; this group involves researchers from QMUL, UCL, City University, Sheffield, Warwick, Oxford, Melbourne (Australia) and Calgary (Canada). In addition to her methodological research she has responsibility for the statisical design and analysis aspects of a large number of collaborative research projects mostly concerned with the management of chronic conditions; many of these projects involve cluster randomised trials.


2007 Oct 17
Self-management education programmes by lay leaders for people with chronic conditions
Foster G;Taylor SJ;Eldridge S;Ramsay J;Griffiths C;, The Cochrane Database of Systematic Reviews, vol: , pp:-

2007 May 5
Educational outreach to promote screening for tuberculosis in primary care: a cluster randomised controlled trial
Griffiths C;Sturdy P;Brewin P;Bothamley G;Eldridge S;Martineau A;MacDonald M;Ramsay J;Tibrewal S;Levi S;Zumla A;Feder G;, Lancet, vol: 369, pp:1528-1534

2007 Jun 16
How effective are expert patient (lay led) education programmes for chronic disease?
Griffiths C;Foster G;Ramsay J;Eldridge S;Taylor S;, BMJ, vol: 334, pp:1254-1256

2007 Apr 26
A Single Dose of Vitamin D Enhances Immunity to Mycobacteria
Martineau AR;Wilkinson RJ;Wilkinson KA;Newton SM;Kampmann B;Hall BM;Packe GE;Davidson RN;Eldridge SM;Maunsell ZJ;Rainbow SJ;Berry JL;Griffiths CJ;, Am J Respir Crit Care Med, vol: , pp:-

2007 Apr
Good practice in statistical reporting for Family Practice
Eldridge S;, Fam Pract, vol: 24, pp:93-94

Evaluating hospital at home and early discharge schemes for patients with an acute exacerbation of COPD
Taylor S;Eldridge S;Chang YM;Sohanpal R;Clarke A;, Chron Respir Dis, vol: 4, pp:33-43

Effect of Patient-Specific Ratings vs Conventional Guidelines on Investigation Decisions in Angina
Junghans C;Feder GS;Timmis A;Eldridge SM;Sekhri N;Black N;Shekelle P;Hemingway H;, Archives of Internal Medicine, vol: 167, pp:195-202

2006 Jun
Asking older people about fear of falling did not have a negative effect
Underwood MR;Parsons S;Eldridge SM;Spencer AE;Feder GS;

The Diabetes Manual trial protocol ? a cluster randomized controlled trial of a self management intervention for type 2 diabetes
sturt j;hearnshaw H;Farmer A;dale j;Eldridge SM;, BMC Family Practice, vol: 7, pp:-

Sample size for cluster randomized trials: effect of coefficient of variation of cluster size and analysis method
Eldridge SM;Ashby D;Kerry S;, International Journal of Epidemiology, vol: , pp:-

Panel conditioning in population surveys: can completing questionnaires affect your health?
Underwood M;Parsons S;Eldridge SM;Spencer AE;Feder G;

2005 Nov 10
Randomised controlled trial of a lay-led self-management programme for Bangladeshi patients with chronic disease
Griffiths C;Motlib J;Azad A;Ramsay J;Eldridge S;Feder G;Khanam R;Munni R;Garrett M;Turner A;Barlow J;

2005 Jul 3
Why modelling a complex intervention is an important precursor to trial design: lessons from studying an intervention to reduce falls-related injuries in older people
Eldridge S;Spencer A;Cryer C;Parsons S;Underwood M;Feder G;, J Health Serv Res Policy, vol: 10, pp:133-142

2005 Jan 24
Self management education by lay leaders for people with chronic conditions (Protocol)
Griffiths C;Taylor S;Feder G;Candy B;Ramsay J;Eldridge S;Barlow J;

2005 Feb
PreDoVE: A pilot study to evaluate the feasibility of a primary care based intervention for improving the health care response to domestic violence.
Foster G;Ramsay J;Eldridge S;Feder G;

2005 Apr
Informed patient consent to participation in cluster randomized trials: an empirical exploration of trials in primary care
Eldridge S;Ashby D;Feder G;, Clinical Trials, vol: 2, pp:91-98

2004 Sep
Beliefs and behavior of deceivers in a randomized, controlled trial of anti-smoking advice at a primary care clinic in Kelantan, Malaysia
Jackson AA;Manan WA;Gani AS;Eldridge S;Carter YH;

2004 Jan 3
Randomised controlled trial of support from volunteer counsellors for mothers considering breast feeding
Graffy J;Taylor J;Williams A;Eldridge S;

2004 Jan 17
Specialist nurse intervention to reduce unscheduled asthma care in a deprived multiethnic area: the east London randomised controlled trial for high risk asthma (ELECTRA)
Griffiths C;Foster G;Barnes N;Eldridge S;Tate H;Begum S;Wiggins M;Dawson C;Livingstone AE;Chambers M;Coats T;Harris R;Feder GS;

2004 Aug
Patterns of intra-cluster correlation from primary care research to inform study design and analysis
Adams G;Gulliford MC;Ukoumunne OC;Eldridge S;Chinn S;Campbell MJ;

Lessons for cluster randomized trials in the twenty-first century: a systematic review of trials in primary care
Eldridge SM;Ashby D.;Feder GS;Rudnick AR;Ukoumunne OC;, Clinical Trials, vol: , pp:80-90

Development and preliminary examination of the predictive validity of the Falls Risk Assessment Tool (FRAT) for use in primary care
Nandy S;Parsons S;Cryer C;Underwood M;Rashbrook E;Carter Y;Eldridge S;Close J;Skelton D;Taylor S;Feder G;, Journal of Public Health, vol: 26, pp:1-6

2003 Oct
Can a self-management programme delivered by a community pharmacist improve asthma control? A randomised trial
Barbanel D;Eldridge S;Griffiths C;, Thorax, vol: 58, pp:851-854

What's wrong with recent cluster randomised trials and how do we make them better?
Eldridge S;Feder G;Ashby D;

How large should my sample size be for a cluster randomised trial with variable cluster size?
Eldridge S;Kerry S;Ashby D;

How reliable are estimates of intr-cluser correlation for binary outcomes and can w improve them?
Eldridge S;Ashby D;Feder G;

Expert Bangladeshi patients? Interim results for a randomised trial of lay-led self-management in Bangladeshis with chronic disease. Or can California come to East London
Griffiths CJ;Ramsay J;Motlib J;Azad A;Begum R;Garrett M;Barlow J;Feder G;Eldridge S;