School of Science and Technology

Dr. Gabriel Otieno Okello is an Assistant Professor of Statistics and Data Science at the School of Science and Technology, Department of Data Science and Analytics, and the current Chair of Department of Data Science and Analytics. He is also a senior statistics and data science consultant, and has published several articles in journals both locally and internationally together with University level books. He is also an expert in Data Science, Statistics, Data Analytics using R, Python, Power BI, SQL, SPSS, STATA, Excel, Nvivo, Atlas.ti. Dr. Okello has certification in bio-ethics and is a reviewer for Institutional Review Board. He has undertaken various consultancies as: Project Team Leader, Consulting Data Specialist, Consulting Statistician, Lead Consultant (Researcher) and Co-Researcher. He has also supervised several Masters and PhD students. He is a member of USIU-A Institutional Review Board (IRB), International Biometric Society (IBS) – Kenya, International Society for Clinical Biostatistics (ISCB), American Evaluation Association (AEA) and Canadian Journal of Program Evaluation (CJPE) E-Learning Editor

His research interests are in Data Science, Artificial Intelligence, Statistics, Data Analytics, Mathematical Modelling and Multidisciplinary Research.

University Level Books

Okello, G.O. (2025). Introduction to Data Science and Analytics. Submitted to Chapman and Hall/ CRC

Okello, G.O. (2024). Statistical Methods Using SPSS (1^st Ed). Chapmann & Hall/CRC. https://doi.org/10.1201/9781003386636

Okello, G.O (2022). Simplified Business Statistics Using SPSS (1^st Ed). Chapmann & Hall/CRC. https://doi.org/10.1201/9781003292654

Journal Publications

Okello GO. A Recommender System Approach for Students Drop Out Prediction. Research Article on Progress to be Submitted (2025)

Okello GO. Predicting University Students Progression Using Deep Learning. Research Article on Progress to be Submitted (2025)

Omanyo J, Rumo J, Okello G. Learning management system quality and sustainability in higher education institutions: a multi-group analysis using PLS-SEM. Research Article on Submitted to Education Innovations: Systems and Future Learning (2025)

Kwarase P., Amrein-Beardsley A., Wambua P., Duong B., Akumu K., Olemo C., Okello G., Njuguna A., Boyce A., Kim M., Silova I., Nielson A. Resilient, High-Quality, and Inclusive E-learning: A Participatory, Large-Scale Examination of a Multinational E-Learning Initiative. Submitted to Educational Technology Research and Development (2025)

Ogwel B, Mzazi VH, Awuor AO, Otieno G, Ogolla S, Nyawanda BO, Omore R. A Quarter-Century of Synthetic Data in Healthcare: Unveiling Trends with Structural Topic Modeling. medRxiv, 2025.03. 30.25324911

Ogwel, B., Ochieng, J.B., Parashar, U.D., Omore, R., Tate, J.E., Mzazi, V., Awuor, A.O., Onyando, B., Okello, C., Juma, J., Otieno, G. Thematic and Geographic Evolution of Rotavirus Vaccination Research (2004–2024): A Structural Topic Modeling Study. Available at SSRN: http://dx.doi.org/10.2139/ssrn.5393007

Ogwel, B., Mzazi, V., Nyawanda, B., Otieno, G., Tickell, K., Omore, R. A (2024). Machine Learning Approach to Predicting Inpatient Mortality among Pediatric Acute Gastroenteritis Patients in Kenya. Learning Health Systems, e10478.

Mbatia BN, Ndegwa JW, Okello G. Integration of Technology in Content Development for Effective Online Teaching in Private Universities in Kenya. Pan-African Journal of Education and Social Sciences, 2023.

Ogwel B, Mzazi V, Nyawanda B, Otieno G, Omore R: Predictive Modelling for Diarrheal Disease: A Systematic Review. Learning Health Systems, 2023.

Ogwel B, Odhiambo-Otieno G, Otieno G, Abila J, Omore R. Leveraging cloud computing for improved health service delivery: Findings from public health facilities in Kisumu County, Western Kenya – 2019. Learn Health Sys. 2022;e10276, 1 -10.

Ogwel B, Odhiambo-Otieno G, Otieno G, Abila J, Omore R. Leveraging cloud computing for improved health service delivery: Findings from public health facilities in Kisumu County, Western Kenya – 2019. Learn Health Sys. 2021;e10276, 1 -10.

Ndiege JRA, Otieno G, Wamuyu PK. Cyberbullying in Universities in Developing Countries: The Kenyan perspective. The African Journal of Information Systems 2020, 12(1) 2

Ndiege JR, Otieno G. Towards Information Security Savvy Students in Institutions of Higher Learning in Africa: A Case of a University in Kenya. In the IST-Africa 2018 Conference Proceedings

Ndiege JR, Otieno G. Information security awareness amongst students joining higher academic institutions in developing countries: Evidence from Kenya, The African Journal of Information Systems 2018, 10 (3)

Otieno G, Koske JK, Mutiso JM. Transmission Dynamics and Optimal Control of Malaria in Kenya. Discrete Dynamics in Nature and Society, 2016

Otieno G, Koske JK, Mutiso JM. Cost Effectiveness Analysis of Optimal Malaria Control Strategies in Kenya. Mathematics 2016, 4(1), 14 ; doi:10.3390/math4010014

Zurovac D, Memusi D, Kigen S, Machini B, Muturi A, Otieno G, Snow RW, Githinji S, Nyandigisi A. Major improvements in the quality of malaria case-management under the “test and treat” policy in Kenya. PLoS ONE 2014, 9(3): e92782. doi:10.1371/journal.pone.0092782

Otieno G, Githinji S, Jones C, Snow RW, Talisuna A, Zurovac D. The feasibility, patterns of use and acceptability of using mobile phone text-messaging to improve treatment adherence and post-treatment review of children with uncomplicated malaria in western Kenya. Malaria Journal 2014, 13:14. doi:10.1186/1475-2875-13-44

Otieno G, Waititu AG, Salifu D. Generalized Estimating Equations for Repeated Measures Logistic Regression in Mosquito Dose-Response. Open Journal of Statistics 2013, 3:293-298. http://dx.doi.org/10.4236/ojs.2013.35034.

Zurovac D, Otieno G, Kigen S, Mbithi A, Muturi A, Snow R, Nyandigisi A. Ownership and use of mobile phones among health workers, caregivers of sick children and adult patients in Kenya: cross-sectional national survey. Globalization and Health 2013, 9:20 doi:10.1186/1744-8603-9-20.

Machini B, Kigen S, Memusi D, Mbithi A, Kimbui R, Muturi A, Agwa N, Otieno G, Githinji S, Zurovac D, Nyandigisi A. Monitoring outpatient malaria case management under the 2010 diagnostic and treatment policy in Kenya- brief progress report. Division of Malaria Control, Ministry of Public Health and Sanitation, February 2013

Education

2016: Doctor of Philosophy (Ph.D.) in Biostatistics, Moi University

2018: Masters of Science in Management and Organizational Development, United States International University - Africa

2013: Master of Science in Research Methods, Jomo Kenyatta University of Agriculture and Technology

2012: Master of Science Biometry (Biostatistics), University of Nairobi

2007: B Ed. Sc (Double Mathematics), Egerton University