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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

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
The Gambia
Cambodia
Malawi
Senegal
Uganda
South Africa
Zambia
Region
Sub-Saharan Africa (all income levels)

Selected Publications

Directed and target focused multi-sectoral adolescent HIV prevention: Insights from implementation of the 'DREAMS Partnership' in rural South Africa.
Chimbindi N; Birdthistle I; Floyd S; Harling G; Mthiyane N; Zuma T; Hargreaves JR; Seeley J; Shahmanesh M
2020
Journal of the International AIDS Society
HIV Stigma and Viral Suppression Among People Living With HIV in the Context of Universal Test and Treat: Analysis of Data From the HPTN 071 (PopART) Trial in Zambia and South Africa.
Hargreaves JR; Pliakas T; Hoddinott G; Mainga T; Mubekapi-Musadaidzwa C; Donnell D; Piwowar-Manning E; Agyei Y; Mandla NF; Dunbar R
2020
Journal of acquired immune deficiency syndromes (1999)
Association between HIV stigma and antiretroviral therapy adherence among adults living with HIV: baseline findings from the HPTN 071 (PopART) trial in Zambia and South Africa.
Jones HS; Floyd S; Stangl A; Bond V; Hoddinott G; Pliakas T; Bwalya J; Mandla N; Moore A; Donnell D
2020
Tropical Medicine and International Health
\"They have this not care - don't care attitude:\" A Mixed Methods Study Evaluating Community Readiness for Oral PrEP in Adolescent Girls and Young Women in a Rural Area of South Africa.
Nakasone SE; Chimbindi N; Mthiyane N; Nkosi B; Zuma T; Baisley K; Dreyer J; Pillay D; Floyd S; Birdthistle I
2020
AIDS research and therapy
HIV Care Cascade Among Adolescents in a \"Test and Treat\" Community-Based Intervention: HPTN 071 (PopART) for Youth Study.
Shanaube K; Macleod D; Chaila MJ; Mackworth-Young C; Hoddinott G; Schaap A; Floyd S; Bock P; Hayes R; Fidler S
2020
The Journal of adolescent health : official publication of the Society for Adolescent Medicine
Interpretation of serial interferon-gamma test results to measure new tuberculosis infection among household contacts in Zambia and South Africa.
Sloot R; Shanaube K; Claassens M; Telisinghe L; Schaap A; Godfrey-Faussett P; Ayles H; Floyd S
2020
BMC infectious diseases
The effect of universal testing and treatment on HIV stigma in 21 communities in Zambia and South Africa.
Stangl AL; Pliakas T; Mainga T; Steinhaus M; Mubekapi-Musadaidzwa C; Viljoen L; Dunbar R; Schaap A; Floyd S; Mandla N
2020
AIDS (London, England)
Young people's experiences of sexual and reproductive health interventions in rural KwaZulu-Natal, South Africa
Zuma T; Seeley J; Mdluli S; Chimbindi N; Mcgrath N; Floyd S; Birdthistle I; Harling G; Sherr L; Shahmanesh M
2020
International Journal of Adolescence and Youth
See more Publications