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Biography

Tobias Chirwa is an Associate Professor and Head of the Wits School of Public Health (SPH). He is the Programme Director for the Wellcome funded Sub-Saharan Africa Consortium for Advanced Biostatistics (SSACAB). He is also the PI for the University of North Carolina (UNC) and Wits D43 Fogarty grant on AIDS Implementation Science and Advanced Cohort Analyses, and co-PI for the WHO/TDR Implementation Research. Prior to this, he was the Head of the Division of Epidemiology and Biostatistics at Wits SPH and a Research Fellow in Medical Statistics at the London School of Hygiene and Tropical Medicine (LSHTM).

He also held administrative positions like the Dean, Faculty of Science; Head, Department of Mathematical Sciences at University of Malawi (UNIMA) and was President of Statistical Association of Malawi. He has led postgraduate capacity building initiatives including the Norwegian-funded NUFU PhD programme, MSc Biostatistics and Informatics at UNIMA. He continued to develop curriculum while at Wits: short courses in biostatistics; MSc programmes in Biostatistics, Research Data Management and Implementation Science.

He has initiated research collaboration with more than five Wits research entities and within SSACAB training and research institutions, and has raised over US$17 million in research and training grants as PI/Co-PI. He has provided leadership to research and consultancy projects on STIs, tuberculosis (TB) and HIV, disease surveillance, maternal and newborn health. He continues to work on TB diagnosis, treatment adherence and post-treatment survival, child health, specifically low birth weight infants, and more recently malaria. His statistical interests are in longitudinal and survival data analysis.

He has supervised eight PhD and 35 MSc students to completion. He has contributed to more than 100 peer-reviewed journal articles, book chapters and has been a co-editor to two books and a special journal issue.

Activities

Employment (1)

University of the Witwatersrand Johannesburg: Johannesburg-Braamfontein, ZA

Associate Professor & Head of School (School of Public Health, Division of Epidemiology & Biostatistics)
Employment
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Tobias Chirwa

Education and qualifications (2)

Universiteit Hasselt: Hasselt, BE

MSc (Biostatistics)
Education
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Tobias Chirwa

London School of Hygiene & Tropical Medicine: London, London, GB

PhD (Epidemiology and Biostatistics) (Infectious Disease Epidemiology Unit)
Education
Source: Self-asserted source
Tobias Chirwa

Works (50 of 83)

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Spatial Analysis of Antiretroviral Therapy Attrition Among Adults in Zimbabwe HIV: Geo-Additive Bayesian Survival Models

2023 | Book chapter
Contributors: Zvifadzo Matsena Zingoni; Tobias F. Chirwa; Jim Todd; Eustasius Musenge
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Loss to Follow-Up Risk among HIV Patients on ART in Zimbabwe, 2009–2016: Hierarchical Bayesian Spatio-Temporal Modeling

International Journal of Environmental Research and Public Health
2022-09-02 | Journal article
Contributors: Zvifadzo Matsena Zingoni; Tobias Chirwa; Jim Todd; Eustasius Musenge
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Evaluating context-specific evidence-based quality improvement intervention on lymphatic filariasis mass drug administration in Northern Ghana using the RE-AIM framework

Tropical Medicine and Health
2021 | Journal article
Contributors: Manyeh, Alfred Kwesi; Chirwa, Tobias; Ramaswamy, Rohit; Baiden, Frank; Ibisomi, Latifat
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Markov modelling of viral load adjusting for CD4 orthogonal variable and multivariate conditional autoregressive mapping of the HIV immunological outcomes among ART patients in Zimbabwe

Theoretical Biology and Medical Modelling
2021-12 | Journal article
Contributors: Zvifadzo Matsena Zingoni; Tobias F. Chirwa; Jim Todd; Eustasius Musenge
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Considerations for an integrated population health databank in Africa: lessons from global best practices [version 1; peer review: 2 approved]

2021-08-23 | Journal article
Part of ISSN: 2398-502X
Funded by GRANT_NUMBER:

Research Ecosystems in Africa and Asia Priority Area

Contributors: Jude O. Igumbor; Edna N. Bosire; Marta Vicente-Crespo; Ehimario U. Igumbor; Uthman A. Olalekan; Tobias F. Chirwa; Sam M. Kinyanjui; Catherine Kyobutungi; Sharon Fonn; Bosire Edna N. et al.
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A comparison of complete pathologic response rates following neoadjuvant chemotherapy among South African breast cancer patients with and without concurrent HIV infection

Breast Cancer Research and Treatment
2020 | Journal article
Contributors: Nietz, Sarah; O'Neil, Daniel S.; Ayeni, Oluwatosin; Chen, Wenlong Carl; Joffe, Maureen; Jacobson, Judith S.; Neugut, Alfred, I; Ruff, Paul; Mapanga, Witness; Buccimazza, Ines et al.
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A prospective observational study of developmental outcomes in survivors of neonatal hypoxic ischaemic encephalopathy in South Africa

South African Medical Journal
2020 | Journal article
Contributors: Ballot, D. E.; Rakotsoane, D.; Cooper, P. A.; Ramdin, T. D.; Chirwa, T.; Pepper, M. S.
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Development of the FAST-M maternal sepsis bundle for use in low resource settings: a modified Delphi process

BJOG: An International Journal of Obstetrics & Gynaecology
2020 | Journal article
Contributors: Lissauer, D.; Cheshire, J.; Dunlop, C.; Taki, F.; Wilson, A.; Smith, J. M.; Daniels, R.; Kissoon, N.; Malata, A.; Chirwa, T. et al.
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Dietary consumption and its effect on nutrition outcome among under-five children in rural Malawi

Plos One
2020 | Journal article
Contributors: Machira, Kennedy; Chirwa, Tobias
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Enhancing science preparedness for health emergencies in Africa through research capacity building

BMJ Global Health
2020 | Journal article
Contributors: Kinyanjui, Sam; Fonn, Sharon; Kyobutungi, Catherine; Vicente-Crespo, Marta; Bonfoh, Bassirou; Ndungu, Thumbi; Sewankambo, Nelson Kaulukusi; Djimde, Abdoulaye A.; Gaye, Oumar; Chirwa, Tobias et al.
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Systematic review of statistical methods for safety data in malaria chemoprevention in pregnancy trials

Malaria Journal
2020 | Journal article
Contributors: Patson, Noel; Mukaka, Mavuto; Otwombe, Kennedy N.; Kazembe, Lawrence; Mathanga, Don P.; Mwapasa, Victor; Kabaghe, Alinune N.; Eijkemans, Marinus J. C.; Laufer, Miriam K.; Chirwa, Tobias
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A biostatistical support system in health sciences: is this sustainable in a resource-restricted environment?

Health Research Policy and Systems
2019 | Journal article
Contributors: Libhaber, Elena; Chirwa, Tobias; Kramer, Beverley
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Determinants of health workers intention to use malaria rapid diagnostic test in Kintampo North Municipality, Ghana - a cross-sectional study

BMC Health Services Research
2019 | Journal article
Contributors: Anaba, Michael Kurubire; Ibisomi, Latifat; Owusu-Agyei, Seth; Chirwa, Tobias; Ramaswamy, Rohit
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Evaluating the long-term impacts of prenatal stress from apartheid on adult inflammation, blood pressure, and mental health risk in Soweto, South Africa

American Journal of Human Biology
2019 | Journal article
Contributors: Kim, A. W.; Ngwepe, P. D.; Chirwa, T.; Mohamed, R. S.; Kuzawa, C. W.; Norris, S. A.
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HIV Disease Progression Among Antiretroviral Therapy Patients in Zimbabwe: A Multistate Markov Model

Frontiers in Public Health
2019 | Journal article
Contributors: Zingoni, Zvifadzo Matsena; Chirwa, Tobias F.; Todd, Jim; Musenge, Eustasius
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Systematic review of analytical methods applied to longitudinal studies of malaria

Malaria Journal
2019 | Journal article
Contributors: Stanley, Christopher C.; Kazembe, Lawrence N.; Mukaka, Mavuto; Otwombe, Kennedy N.; Buchwald, Andrea G.; Hudgens, Michael G.; Mathanga, Don P.; Laufer, Miriam K.; Chirwa, Tobias F.
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SYSTEMATIC REVIEW OF STATISTICAL METHODS FOR ANALYSIS OF SAFETY DATA IN MALARIA CHEMOPREVENTION AND TREATMENT IN PREGNANCY CLINICAL TRIALS

The American Journal of Tropical Medicine and Hygiene
2019 | Journal article
Contributors: Patson, Noel P.; Laufer, Miriam K.; Mukaka, Mavuto; Kabaghe, Alinune; Mathanga, Don; Mwapasa, Victor; Kazembe, Lawrence; Otwombe, Kennedy N.; Eijkemans, Marinus J.; Chirwa, Tobias
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Treatment outcomes of children with Hodgkin lymphoma between 2000 and 2010: first report by the South African Children's Cancer Study Group (vol 64, e26536, 2017)

Pediatric Blood and Cancer
2019 | Journal article
Contributors: Geel, Jennifer A.; Chirwa, Tobias C.; Rowe, Biance; Eyal, Katherine C.; Omar, Fareed; Stones, David K.; Goga, Yasmin; Stefan, D. Cristina; Zyl, Anel; Emmenes, Barry et al.
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Using intervention mapping to design and implement quality improvement strategies towards elimination of lymphatic filariasis in Northern Ghana

PLoS Neglected Tropical Diseases
2019 | Journal article
Contributors: Manyeh, Alfred Kwesi; Ibisomi, Latifat; Baiden, Frank; Chirwa, Tobias; Ramaswamy, Rohit
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Can lay health workers support the management of hypertension? Findings of a cluster randomised trial in South Africa

BMJ Global Health
2018 | Journal article
Contributors: Goudge, Jane; Chirwa, Tobias; Eldridge, Sandra; Gomez-Olive, Francesc Xavier F.; Kabudula, Chodziwadziwa; Limbani, Felix; Musenge, Eustasius; Thorogood, Margaret
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Neurodevelopmental outcome of late preterm infants in Johannesburg, South Africa

BMC Pediatrics
2018 | Journal article
Contributors: Ramdin, Tanusha; Ballot, Daynia; Rakotsoane, David; Madzudzo, Lethile; Brown, Nicolette; Chirwa, Tobias; Cooper, Peter; Davies, Victor
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Using an implementation framework to build implementation science capacity in Africa: the UNC/wits university collaboration

Implementation Science
2018 | Journal article
Contributors: Ramaswamy, Rohit; Ncayiyana, Jabulani; Ibisomi, Latifat; Chirwa, Tobias; Salisbury, Kathryn; Pettifor, Audrey
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Quality of care delivered to type 2 diabetes mellitus patients in public and private sector facilities in Johannesburg, South Africa

International Journal of General Medicine
2018-10 | Journal article
Contributors: Yacob Pinchevsky; Frederick Raal; Neil Butkow; Tobias Chirwa; Larry Distiller; Alan Rothberg
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A review of antenatal corticosteroid use in premature neonates in a middle-income country

South African Medical Journal
2017 | Journal article
Contributors: Laher, A.; Ballot, D. E.; Ramdin, T.; Chirwa, T.
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Population Dynamics and Plasmodium falciparum (Haemosporida: Plasmodiidae) Infectivity Rates for the Malaria Vector Anopheles arabiensis (Diptera: Culicidae) at Mamfene, KwaZulu-Natal, South Africa

Journal of Medical Entomology
2017 | Journal article
Contributors: Dandalo, Leonard C.; Brooke, Basil D.; Munhenga, Givemore; Lobb, Leanne N.; Zikhali, Jabulani; Ngxongo, Sifiso P.; Zikhali, Phineas M.; Msimang, Sipho; Wood, Oliver R.; Mofokeng, Mohlominyana et al.
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South African Breast Cancer and HIV Outcomes Study: Methods and Baseline Assessment

Journal of Global Oncology
2017 | Journal article
Contributors: Cubasch, Herbert; Ruff, Paul; Joffe, Maureen; Norris, Shane; Chirwa, Tobias; Nietz, Sarah; Sharma, Vinay; Duarte, Raquel; Buccimazza, Ines; Cacala, Sharon et al.
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THE PREVALENCE OF ANAL HIGH-RISK HUMAN PAPILLOMAVIRUS INFECTIONS AND ASSOCIATED RISK FACTORS IN MEN-WHO-HAVE-SEX-WITH-MEN IN CAPE TOWN, SOUTH AFRICA

Sexually Transmitted Infections
2017 | Journal article
Contributors: Mueller, E. E.; Rebe, K.; Chirwa, T. F.; Struthers, H.; McIntyre, J.; Lewis, D. A.
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Treatment Gaps Found in the Management of Type 2 Diabetes at a Community Health Centre in Johannesburg, South Africa

Journal of Diabetes Research
2017 | Journal article
Contributors: Pinchevsky, Yacob; Butkow, Neil; Chirwa, Tobias; Raal, Frederick
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Treatment outcomes of children with Hodgkin lymphoma between 2000 and 2010: First report by the South African Children's Cancer Study Group

Pediatric Blood and Cancer
2017 | Journal article
Contributors: Geel, Jennifer A.; Chirwa, Tobias C.; Rowe, Biance; Eyal, Katherine C.; Omar, Fareed; Stones, David K.; Goga, Yasmin; Stefan, D. Cristina; van Zyl, Anel; Van Emmenes, Barry et al.
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Using an implementation framework to build implementation science capacity in Africa: the UNC/wits university collaboration

Implementation Science
2017 | Journal article
Contributors: Ramaswamy, Rohit; Ncayiyana, Jabulani; Ibisomi, Latifat; Chirwa, Tobias; Salisbury, Kathryn; Pettifor, Audrey
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Factors Influencing Delayed Health Care Seeking Among Pulmonary Tuberculosis Suspects in Rural Communities in Ntcheu District, Malawi

Qualitative Health Research
2016 | Journal article
Contributors: Nyasulu, Peter; Phiri, Faith; Sikwese, Simon; Chirwa, Tobias; Singini, Isaac; Banda, Hastings T.; Banda, Rhoda; Mhembere, Tichaona; Chimbali, Henry; Ngwira, Bagrey et al.
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Hepatitis C genotype distribution in patient and blood donor samples in South Africa for the period 2008-2012

Journal of Viral Hepatitis
2016 | Journal article
Contributors: Prabdial-Sing, N.; Chirwa, T.; Thaver, J.; Smuts, H.; Vermeulen, M.; Suchard, M.; Puren, A. J.
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Knowledge and perception about tuberculosis among children attending primary school in Ntcheu District, Malawi

Journal of Multidisciplinary Healthcare
2016 | Journal article
Contributors: Peter Nyasulu; Susan Kambale; Tobias Chirwa; Teye Umanah; Isaac Singini; Simon Sikwese; Hastings Banda; Rhoda Banda; Bagrey Ngwira; Alister Munthali et al.
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Multi-ethnic differences in HbA(1c), blood pressure, and low-density-lipid cholesterol control among South Africans living with type 2 diabetes, after a 4-year follow-up

International Journal of General Medicine
2016 | Journal article
Contributors: Pinchevsky, Yacob; Shukla, Varada J.; Butkow, Neil; Chirwa, Tobias; Raal, Frederick
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Prevalence of common vitamin D receptor gene polymorphisms in HIV-infected and uninfected South Africans

International Journal of Molecular Epidemiology and Genetics
2016 | Journal article
Contributors: McNamara, Lynne; Takuva, Simbarashe; Chirwa, Tobias; MacPhail, Patrick
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Retrospective cross-sectional review of survival rates in critically ill children admitted to a combined paediatric/neonatal intensive care unit in Johannesburg, South Africa, 2013-2015

BMJ Open
2016 | Journal article
Contributors: Ballot, Daynia E.; Davies, Victor A.; Cooper, Peter A.; Chirwa, Tobias; Argent, Andrew; Mer, Mervyn
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The prevalence of human papillomavirus infections and associated risk factors in men-who-have-sex-with-men in Cape Town, South Africa

BMC Infectious Diseases
2016 | Journal article
Contributors: Mueller, Etienne E.; Rebe, Kevin; Chirwa, Tobias F.; Struthers, Helen; McIntyre, James; Lewis, David A.
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Comparison of morbidity and mortality of very low birth weight infants in a Central Hospital in Johannesburg between 2006/2007 and 2013

BMC Pediatrics
2015 | Journal article
Contributors: Ballot, Daynia E.; Chirwa, Tobias; Ramdin, Tanusha; Chirwa, Lea; Mare, Irma; Davies, Victor A.; Cooper, Peter A.
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Developing a biostatistical support system in a resource-restricted academic institution in Africa: making it happen

BMC Medical Education
2015 | Journal article
Contributors: Chirwa, Tobias; Kramer, Beverley; Libhaber, Elena
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DISPARITIES IN MODERN CONTRACEPTION USE AMONG WOMEN IN THE DEMOCRATIC REPUBLIC OF CONGO: A CROSS-SECTIONAL SPATIAL ANALYSIS OF PROVINCIAL VARIATIONS BASED ON HOUSEHOLD SURVEY DATA

Journal of Biosocial Science
2015 | Journal article
Contributors: Kandala, Ngianga-Bakwin; Lukumu, Felly Kinziunga; Mantempa, Jocelyn Nzinunu; Kandala, Joseph Desire; Chirwa, Tobias
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Does moonlighting influence South African nurses' intention to leave their primary jobs?

Global Health Action
2015 | Journal article
Contributors: Rispel, Laetitia C.; Chirwa, Tobias; Blaauw, Duane
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Glycaemic, blood pressure and cholesterol control in 25 629 diabetics

Cardiovascular Journal of Africa
2015 | Journal article
Contributors: Pinchevsky, Y.; Butkow, N.; Chirwa, T.; Raal, F. J.
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Nosocomial Outbreak of New Delhi Metallo-beta-Lactamase-1-Producing Gram-Negative Bacteria in South Africa: A Case-Control Study

Plos One
2015 | Journal article
Contributors: de Jager, Pieter; Chirwa, Tobias; Naidoo, Shan; Perovic, Olga; Thomas, Juno
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OUTCOMES FOR CHILDREN AND ADOLESCENTS WITH HODGKIN LYMPHOMA 2000-2010: A FIRST REPORT BY THE SOUTH AFRICAN CHILDREN'S CANCER STUDY GROUP

Pediatric Blood and Cancer
2015 | Journal article
Contributors: Geel, J.; Rowe, B.; Chirwa, T.; Omar, F.; Stones, D.; Goga, Y.; Stefan, D.; Van Emmenes, B.; Wedi, O.; Vaithilingum, M. et al.
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The achievement of glycaemic, blood pressure and LDL cholesterol targets in patients with type 2 diabetes attending a South African tertiary hospital outpatient clinic

Journal of Endocrinology, Metabolism and Diabetes of South Africa
2015 | Journal article
Contributors: Pinchevsky, Y.; Shukla, V.; Butkow, N.; Raal, F. J.; Chirwa, T.
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The Association between Multiple Sources of Information and Risk Perceptions of Tuberculosis, Ntcheu District, Malawi

Plos One
2015 | Journal article
Contributors: Chizimba, Robert; Christofides, Nicola; Chirwa, Tobias; Singini, Isaac; Ozumba, Chineme; Sikwese, Simon; Banda, Hastings T.; Banda, Rhoda; Chimbali, Henry; Ngwira, Bagrey et al.
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A Review of the Study Designs and Statistical Methods Used in the Determination of Predictors of All-Cause Mortality in HIV-Infected Cohorts: 2002-2011

Plos One
2014 | Journal article
Contributors: Otwombe, Kennedy N.; Petzold, Max; Martinson, Neil; Chirwa, Tobias
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An exploratory spatial analysis of geographical inequalities of birth intervals among young women in the Democratic Republic of Congo (DRC): a cross-sectional study

BMC Pregnancy and Childbirth
2014 | Journal article
Contributors: Chirwa, Tobias F.; Mantempa, Jocelyn N.; Kinziunga, Felly Lukumu; Kandala, Joseph D.; Kandala, Ngianga-Bakwin
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An outbreak of New Delhi Metallo-beta-Lactamase-1 producing enterobacteriaceae: A case-control study

International Journal of Infectious Diseases
2014 | Journal article
Contributors: de Jager, P.; Thomas, J.; Chirwa, T.; Naidoo, S.
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Factors associated with mortality in HIV-infected people in rural and urban South Africa

Global Health Action
2014 | Journal article
Contributors: Otwombe, Kennedy N.; Petzold, Max; Modisenyane, Tebogo; Martinson, Neil A.; Chirwa, Tobias
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Peer review (6 reviews for 6 publications/grants)

Review activity for African health sciences. (1)
Review activity for Cogent medicine. (1)
Review activity for Current pharmaceutical design. (1)
Review activity for PloS one. (1)
Review activity for Wellcome open research. (1)
Review activity for Women's health. (1)