Professor Caroline Free


Primary Care and Epidemiology

Keppel Street
United Kingdom

0207958 8109

Dr Caroline Free is a Professor of Primary Care and Epidemiology at the London School of Hygiene and Tropical Medicine (LSHTM), a General Practitioner and Honorary Consultant in Sexual and Reproductive Health at Kings College Hospital. She obtained her medical degree from Leeds University, an MSc from LSHTM and PhD, focussing on contraception use, from the University of London. She worked as a clinician in rural India and continues to work in south-east London providing primary, sexual and reproductive health care to an ethnically and socio-economically mixed area of London. 


Faculty of Epidemiology and Population Health
Department of Population Health


Centre for Evaluation
Maternal, Adolescent, Reproductive & Child Health (MARCH)


Foundations for Reproductive Health, Protocol Writing, Epidemiology and Study Design MSc modules.

Co-organiser for the distance learning module protocol writing for the MSc in Clinical trials.

Member of the examinations board for the MSc in Sexual and Reproductive Health.  


Her main interest is the design, evaluation and subsequent implementation of effective primary care interventions, with a major focus on sexual and reproductive health interventions. All interventions are developed in collaboration with potential users and are based on evidence, theory, needs assessment and evidence based behaviour change approaches.

Currently she is the principal investigator for a NIHR funded trial of a safer sex intervention delivered by mobile phone with 6250 participants in the UK- She is also working on an NIHR funded project for the development and pilot trial of a weight management after pregnancy intervention delivered by mobile phone. Other current work focusses on developing and evaluating interventions to increase use of contraception and the evaluation of digital STI testing and contraception service. She is an advisor to WHO M-health working groups for non-communicable disease and maternal, reproductive, neonatal, and child health. 

She was the principal investigator for the txt2stop trial, which was the first trial to demonstrate that smoking cessation support delivered by text message more than doubled biochemically verified smoking cessation at 6 months. She worked with DH Englad to develop a service which has been used by 60,000-90,000 people each year since 2012. She is a advisor to the WHO m-cessation working group who have supported the devlopment of similar services in India, Cost Rica, Philipines.  

Research Area
Clinical trials
Health promotion
Primary care
Sexual health
Behaviour change
Mixed methods
Mobile technologies
Reproductive health
Disease and Health Conditions
Sexually transmitted disease
Non-communicable diseases
Sexually transmitted infection
United Kingdom