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Sian Floyd

BSc MSc

Associate Professor
in Epidemiology and Medical Statistics

Room
Room 105a

LSHTM
Keppel Street
London
WC1E 7HT
United Kingdom

Tel.
020 7927 2516

Fax.
020 7636 8739

Sian Floyd joined the school in 1998. She obtained an MSc in Biometry from Reading University in 1993, and then worked as a biometrician in the agricultural and natural resources sector for four years, first in the Caribbean and then in the UK.

Affiliations

Department of Infectious Disease Epidemiology

Teaching

Sian is a co-organiser, with James Lewis, for the distance-learning Advanced Statistical Methods in Epidemiology module (since 2004). Prior to this she was co-organiser for the in-house Statistical Methods in Epidemiology study unit, from 2000-2003. She currently teaches on the study units Statistical Methods in Epidemiology, and Epidemiology and Control of Communicable Diseases.

Research

Sian works as a statistician/epidemiologist on the Karonga Prevention Study (KPS), which is based in northern Malawi. Her research on this project focuses on quantifying and understanding the extent to which the provision of free anti-retroviral therapy (ART) reverses the impact of the HIV epidemic. Important outcomes that are being measured include: child and adult mortality; social and economic consequences such as orphanhood, educational achievement of children, and household poverty; HIV incidence and sexual behaviour at the population level; and the percentage of the adult population who know their HIV status. She also contributes to the work of the Alpha-Network (Analysis of Longitudinal data on HIV/AIDS on Africa), which is led by Professor Basia Zaba. This network brings together researchers from demographic surveillance sites (DSS) in sub-Saharan Africa (including in Malawi, South Africa, Tanzania, Uganda, and Zimbabwe), and combines research with capacity-building through themed workshops.

Sian has also worked on case-control and cohort studies of tuberculosis, including immuno-epidemiological studies,  and is currently a member of an expert group convened by WHO whose mandate is to support 21 global focus countries to design, implement, and analyse TB prevalence surveys between 2008 and 2015.

Research Area
Clinical trials
Complex interventions
Vaccines
Randomised controlled trials
Discipline
Immunoepidemiology
Epidemiology
Statistics
Disease and Health Conditions
HIV/AIDS
Tuberculosis
Country
Benin
Guinea
Gambia, The
Cambodia
Malawi
Senegal
Uganda
South Africa
Zambia
Region
Sub-Saharan Africa (all income levels)

Selected Publications

Recurrent TB: relapse or reinfection? The effect of HIV in a general population cohort in Malawi.
Crampin, A.C.; Mwaungulu, J.N.; Mwaungulu, F.D.; Mwafulirwa, D.T.; Munthali, K.; Floyd, S.; Fine, P.E.; Glynn, J.R.;
AIDS
Declining child mortality in northern Malawi despite high rates of infection with HIV.
Jahn, A.; Floyd, S.; Crampin, A.C.; Mvula, H.; Mwinuka, V.; Mwaiyeghele, E.; McGrath, N.; Zaba, B.; Fine, P.E.; Glynn, J.R.;
Bull World Health Organ
Population-level reduction in adult mortality after extension of free anti-retroviral therapy provision into rural areas in northern Malawi.
Floyd, S.; Molesworth, A.; Dube, A.; Banda, E.; Jahn, A.; Mwafulirwa, C.; Ngwira, B.; Branson, K.; Crampin, A.C.; Zaba, B.; Glynn, J.R.; French, N.;
PLoS One
Is education the link between orphanhood and HIV/HSV-2 risk among female adolescents in urban Zimbabwe?
Birdthistle, I.; Floyd, S.; Nyagadza, A.; Mudziwapasi, N.; Gregson, S.; Glynn, J.R.;
Soc Sci Med
Complex cytokine profiles induced by BCG vaccination in UK infants.
Lalor, M.K.; Smith, S.G.; Floyd, S.; Gorak-Stolinska, P.; Weir, R.E.; Blitz, R.; Branson, K.; Fine, P.E.; Dockrell, H.M.;
Vaccine
The long-term social and economic impact of HIV on the spouses of infected individuals in northern Malawi.
Floyd, S.; Crampin, A.C.; Glynn, J.R.; Mwenebabu, M.; Mnkhondia, S.; Ngwira, B.; Zaba, B.; Fine, P.E.;
Trop Med Int Health
Assessment and evaluation of contact as a risk factor for tuberculosis in rural Africa.
Crampin, A.C.; Floyd, S.; Ngwira, B.M.; Mwinuka, V.; Mwaungulu, J.N.; Branson, K.; Fine, P.E.; Glynn, J.R.;
Int J Tuberc Lung Dis
The social and economic impact of parental HIV on children in northern Malawi: Retrospective population-based cohort study.
Floyd, S.; Crampin, A.C.; Glynn, J.R.; Madise, N.; Mwenebabu, M.; Mnkhondia, S.; Ngwira, B.; Zaba, B.; Fine, P.E.;
AIDS Care
See all Sian Floyd's Publications