Mr Ab Schaap MSc

Research Fellow Statistics/Data Specialist

• Affiliation
• Teaching
• Research
• Publications

Albertus (Ab) Schaap joined the school in 2004. He is based in Lusaka, Zambia at the ZAMBian AIDS-Related Tuberculosis (ZAMBART) research project.

• LSHTM
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• T: +260 211 254710, +260 977 442965
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Ab obtained an MSc in Medical Biology from the University of Amsterdam in 1984 and subsequently trained in Information Technology, epidemiology and statistics. He worked for the Dutch National Institute for Public Health and the Environment (1991-1999) and the Ethio-Netherlands AIDS Research Project (ENARP) in Addis Ababa, Ethiopia (1999– 2004).

The Zambia AIDS Related Tuberculosis (ZAMBART) Project is Research organization based at the University of Zambia Ridgeway Campus. From initial studies of the impact of HIV on the clinical presentation and outcome of tuberculosis, the scope and partnership of the research have expanded widely. ZAMBART now collaborates closely with government, non-governmental and academic institutions within Zambia, Africa and the rest of the world. ZAMBART staff form an interdisciplinary team with a range of expertise including epidemiology, clinical science, social science, laboratory, operations research, health systems and services research, health policy analysis, health economics, development communication and counselling.

Affiliation

• Department of Infectious Disease Epidemiology

Teaching

Ab is tutor for the distance learning Statistics with Computing in Epidemiology and supervises and marks projects of MSc students Epidemiology.

Research

Ab is heading the Data Unit of ZAMBART. This unit supports all ZAMBART activities with medical statistics, data management and IT-infrastructure. Ab’s research activities focus on large Cluster Randomized Trial’s and his contribution includes study design, sampling and field procedures, quality control, database development, data analysis, and supervision and training of field staff.

The ZAMBian South-african Tb and Aids Reduction study (ZAMSTAR) started in 2005 in 24 communities in Zambia and South-Africa and is phasing out in 2012. ZAMSTAR was aimed to study the effect of a community and a household based intervention on incidence and prevalence of tuberculosis in HIV-prevalent settings. Primary outcome was a TB culture prevalence survey among 96.000 participants.

The BHOMA (Better Health Outcomes through Mentoring and Assessment) project is up and running since 2011 and studies the impact of health care strengthening and community engagement on health outcomes in 42 rural communities in Zambia. Adult and child mortality are the primary outcomes of this trial.

Finally POPArt is in the preparatory stage and interventions are expected to start in 2013. This trial aims to measures the impact of universal testing and treatment of HIV on incidence of HIV. POPArt will use the same 24 communities as the ZAMSTAR trial.

• Selected publications

• Comparison of four culture systems for Mycobacterium tuberculosis in the Zambian National Reference Laboratory

  Muyoyeta, M.; Schaap, J.A.; de Haas, P.; Mwanza, W.; Muvwimi, M.W.; Godfrey-Faussett, P.; Ayles, H.

  International Journal of Tuberculosis and Lung Disease, 2009; 13(4):460-465

• Prevalence of Tuberculosis, HIV and Respiratory Symptoms in Two Zambian Communities: Implications for Tuberculosis Control in the Era of HIV.

  Ayles, H.; Schaap, A.; Nota, A.; Sismanidis, C.; Tembwe, R.; De Haas, P.; Muyoyeta, M.; Beyers, N.; Godfrey-Faussett, P; for the ZAMSTAR Study Team, .;

  PLoS ONE, 2009; 4(5):e5602

• Restricted randomization of ZAMSTAR: a 2 x 2 factorial cluster randomized trial.

  Sismanidis, C.; Moulton, L.H.; Ayles, H.; Fielding, K.; Schaap, A.; Beyers, N.; Bond, G.; Godfrey-Faussett, P.; Hayes, R.;

  Clin Trials, 2008; 5(4):316-27

• Monitoring cause-specific adult mortality in developing countries: a comparison of data sources for Addis Ababa and its implications for policy and research.

  Reniers, G.; Araya, T.; Schaap, A.; Kumie, A.; Kebede, D.; Nagelkerke, N.; Coutinho, R.; Sanders, E.J.;

  Soc Sci Med, 2005; 61(9):1952-7

• Lay diagnosis of causes of death for monitoring AIDS mortality in Addis Ababa, Ethiopia.

  Araya, T.; Reniers, G.; Schaap, A.; Kebede, D.; Kumie, A.; Nagelkerke, N.; Coutinho, R.; Sanders, E.;

  Trop Med Int Health, 2004; 9(1):178-86

• Mortality impact of AIDS in Addis Ababa, Ethiopia.

  Sanders, E.J.; Araya, T.; Kebede, D.; Schaap, A.J.; Nagelkerke, N.D.; Coutinho, R.A.;

  AIDS, 2003; 17(8):1209-16

• HIV prevalence in 72 000 urban and rural male army recruits, Ethiopia.

  Abebe, Y.; Schaap, A.; Mamo, G.; Negussie, A.; Darimo, B.; Wolday, D.; Sanders, E.J.;

  AIDS, 2003; 17(12):1835-40

• Knowledge and attitudes towards antiretroviral therapy among factory workers participating in a cohort on HIV and AIDS, Addis Ababa, Ethiopia.

  Degefa, A.; Sanders, E.J.; Mekonnen, Y.; Messele, T.; Wolday, D.; Dorigo-Zetsma, W.; Mekonnen, W.; Schaap, A.; Dukers, N.H.;

  Ethiop Med J, 2003; 41 Suppl 1:75-87

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