Prof. Adebowale Olusola Adejumo

@unilorin.edu.ng

Professor, Statistics/ Physical Sciences
University of Ilorin

Prof. Adebowale Olusola Adejumo


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https://researchid.co/ao123adejumo
Adebowale Olusola Adejumo is a Professor in the Department of Statistics, Faculty of Physical Sciences, University of Ilorin, with over 24 years university teaching, research and administrative experience. He has served as the Head of Department and he is the current Faculty Representative in the Postgraduate Board of University of Ilorin. His area of specialization is Statistical Modeling, Biostatistics, Time series and Categorical Data Analysis. He has over ninety national and international publications in reputable outlets covering academic journals, Chapters in books, books, and technical reports and has sole supervised over eighty Masters Dissertations and ten Ph. D. Theses. Prof. Adejumo holds both B.Sc. and M.Sc. degrees in Statistics from University of Ilorin and Ph. D. degree (Dr. rer. nat) in Statistics from Ludwig Maximilians University, Munich, Germany. He is a member of many Professional bodies within and outside Nigeria.
He was a Resource Person at NMC on Time Series

EDUCATION

Ph. D. in Statistics, Ludwig Maximilian University, Munich, Germany
M. SC. in Statistics, University of Ilorin, Ilorin, Nigeria
B. SC. in Statistics, University of Ilorin, Ilorin, Nigeria

RESEARCH, TEACHING, or OTHER INTERESTS

Statistics and Probability, Statistics, Probability and Uncertainty, Modeling and Simulation, Statistics and Probability
29

Scopus Publications

1310

Scholar Citations

20

Scholar h-index

30

Scholar i10-index

Scopus Publications

  • Geo-additive modelling of children under-five sleeping under Insecticide treated nets in Nigeria
    A Ademola Adetunji, A. Justus Ademuyiwa, G. Nihinlolawa Alo, A. Olusola Adejumo
    Geojournal, 2022
    Number of children under-five at risk of malaria in Nigeria is overwhelming and despite several reported effectiveness of Insecticide Treated Nets (ITNs) in malaria prevention, many factors deterring utilization have been reported. To examine spatial variation in South-West region of Nigeria, this study examines level of utilization among under-five children in the region. Data from the 2018 Nigeria Demographic Health Survey is used to examine relationships between different covariates and spatial variation using a semi-parametric model. Gaussian, Poisson and Zero Inflated Poisson distributions were assumed for the response variable and comparisons were made. The Deviance Information Criteria (DIC) is used as selection criteria. With lowest DIC among the competing distributions, Gaussian has the best fit for the model. Spatial variation is observed in the utilization across states. Ondo state has highest net usage among children follow by Ogun state. Both Lagos and Ekiti states have the least. Higher utilizations are observed among rural residents and households without some basic amenities and mass media. Utilization is found to be higher among respondents in the poor category of wealth index. Educational status of mothers is found to affect ITNs utilization. Non-linear effect of age of the children on the number of children sleeping under net has a bathtub shape, indicating decrease in number of children sleeping under net as age increases till around two years and then starts increasing. For effective utilization of ITNs, more efforts are to be put into campaigns on the importance of utilization rather than only ownership.
  • Unique clusters of patterns of breast cancer survivorship
    Hilary I. Okagbue, Pelumi E. Oguntunde, Patience I. Adamu, Adebowale O. Adejumo
    Health and Technology, 2022
  • Modeling Covid-19 Cases in West African Countries: A Comparative Analysis of Quartic Curve Estimation Models and Estimators
    Kayode Ayinde, Hamidu Abimbola Bello, Rauf Ibrahim Rauf, Omokova Mary Attah, Ugochinyere Ihuoma Nwosu, Oluwatoyin Kikelomo Bodunwa, Oluwadare Olatunde Ojo, Roseline Oluwaseun Ogundokun, Taiwo Stephen Fayose, Rasaki Yinka Akinbo, Adebowale Olusola Adejumo, Oluwatosin Akinsola, Abayomi Ayodele Akomolafe, Timothy Olabisi Olatayo, Olabimpe Bodunde Aladeniyi, Emmanuel Idowu Olamide, Samuel Olayemi Olanrewaju
    Studies in Systems Decision and Control, 2022
  • A study of Hepatitis B virus infection using chi-square statistic
    Oluwole A Odetunmibi, Adebowale O Adejumo, Timothy A Anake
    Journal of Physics Conference Series, 2021
    Hepatitis B is caused by the hepatitis B virus (HBV) and it affects livers. It has been established that the disease is a serious medical condition caused by an overpowering immune response to infection. To this effect, there is a need for cross examination of records of patients on this disease to ascertain the factors that could be responsible for the survival or dying from this disease. Descriptive analysis of the data showed that sexually active age bracket (31 – 50) are greatly affected by the disease while female accounted for majority of those that are tested positive to the disease. Chi squared statistic was used to test for independence between age and gender of those who tested positive to disease between 2006 and 2015 in Lagos state, Nigeria. It was discovered that, both variables of age and gender are not independent which means there is association between the Age and Gender of HBV patients.
  • Log-linear modelling of effect of age and gender on the spread of hepatitis B virus infection in Lagos State, Nigeria
    Oluwole A. Odetunmibi, Adebowale O. Adejumo, Timothy A. Anake
    Open Access Macedonian Journal of Medical Sciences, 2019
    BACKGROUND: The effect of age and gender on the transmission of any infectious disease can be of great important because the age at which the host contact the disease may be a determinant on the rate at which the disease will spread.
 AIM: The purpose of this research is to model the significant effect of age and gender on the spread of hepatitis B virus using data collected from Lagos State, Nigeria.
 MATERIAL AND METHODS: The data that was used for this research is a ten years data covering the period of 2006 to 2015, which was collected from Nigeria Institute of Medical Research (NIMR). A log-linear modelling approach was employed using R programming language software. Akaike Information Criterion (AIC) method of model selection was used in selecting the best model.
 RESULTS: It was discovered from the analysis that both factors (age and gender) have a significant effect on the spread of hepatitis B infection. This means that the age at which an individual is tested positive to hepatitis B virus will affect the spread of the disease. In choosing the best model among the four models that were developed, model AY: GY (age & year: gender and year) was found to be the best model.
 CONCLUSION: Age and gender were found to act as a risk influencer that could have a great effect on the transmission of hepatitis B virus infections in Lagos state, Nigeria.
  • Data analysis on physical and mechanical properties of cassava pellets
    Pelumi E. Oguntunde, Oluyemisi A. Adejumo, Oluwole A. Odetunmibi, Hilary I. Okagbue, Adebowale O. Adejumo
    Data in Brief, 2018
    In this data article, laboratory experimental investigation results carried out at National Centre for Agricultural Mechanization (NCAM) on moisture content, machine speed, die diameter of the rig, and the outputs (hardness, durability, bulk density, and unit density of the pellets) at different levels of cassava pellets were observed. Analysis of variance using randomized complete block design with factorial was used to perform analysis for each of the outputs: hardness, durability, bulk density, and unit density of the pellets. A clear description on each of these outputs was considered separately using tables and figures. It was observed that for all the output with the exception of unit density, their main factor effects as well as two and three ways interactions is significant at 5% level. This means that the hardness, bulk density and durability of cassava pellets respectively depend on the moisture content of the cassava dough, the machine speed, the die diameter of the extrusion rig and the combinations of these factors in pairs as well as the three altogether. Higher machine speeds produced more quality pellets at lower die diameters while lower machine speed is recommended for higher die diameter. Also the unit density depends on die diameter and the three-way interaction only. Unit density of cassava pellets is neither affected by machine parameters nor moisture content of the cassava dough. Moisture content of cassava dough, speed of the machine and die diameter of the extrusion rig are significant factors to be considered in pelletizing cassava to produce pellets. Increase in moisture content of cassava dough increase the quality of cassava pellets.
  • Quantitative evaluation of pregnant women delivery status’ records in Akure, Nigeria
    Adebowale O. Adejumo, Esivue A. Suleiman, Hilary I. Okagbue, Pelumi E. Oguntunde, Oluwole A. Odetunmibi
    Data in Brief, 2018
    In this data article, monthly records (datasets) of total delivery, normal delivery, delivery through Caesarean section and number of still births from pregnant women in Akure, the capital city of Ondo state Nigeria, for a period of ten years, between January 2007 and December 2016 were considered. Correlational and time series analyses were conducted on the monthly records of total delivery, normal delivery (delivery through woman virginal), delivery through Caesarean section, and number of still births, in order to observe the patterns each of these indicators follows and to recommend appropriate model for forecasting their future values. The data were obtained in raw form from State Specialist Hospital (SSH), Akure, Ondo state, Nigeria. A clear description and variation in each of these indicators (total delivery, normal delivery, caesarean section, and still births) were considered separately using descriptive statistics and box plots. Different models were also proposed for each of these indicators using time series models.
  • The logistic inverse exponential distribution: Basic structural properties and application
    Lecture Notes in Engineering and Computer Science, 2018
  • A Useful Extension of the Inverse Exponential Distribution
    Pelumi E. Oguntunde, Adebowale O. Adejumo, Mundher A. Khaleel, Enahoro A. Owoloko, Hilary I. Okagbue, Abiodun A. Opanuga
    Transactions on Engineering Technologies 25th World Congress on Engineering Wce 2017, 2018
  • Breast cancer patients in Nigeria: Data exploration approach
    Pelumi E. Oguntunde, Adebowale O. Adejumo, Hilary I. Okagbue
    Data in Brief, 2017
    Breast cancer is the type of cancer that develops from breast tissue; it is mostly common in women and it is one of the most studied diseases, largely because of its high mortality (second to lung cancer). However, it occurs in males also. This article presents a statistical study of the distribution of age, gender, length of stay, mode of diagnosis, status (dead or alive) after treatment and the location of breast cancer among 300 patients admitted in the University of Ilorin teaching hospital, Ilorin, Nigeria. The study covers a period of five (5) years; from 2011 to 2016 and logistic regression was used to perform the basic analysis in this study. It was discovered that the age of patients and the location of the breast cancer (right or left) contributes significantly to the survival of the patients. However, early detection and treatment of the disease is highly encouraged. This study also recommends that awareness should be taken to the grassroots and males should not be excluded from this discussion.
  • Drying kinetic of industrial cassava flour: Experimental data in view
    Oluwole A. Odetunmibi, Oluyemisi A. Adejumo, Pelumi E. Oguntunde, Hilary I. Okagbue, Adebowale O. Adejumo, Esivue A. Suleiman
    Data in Brief, 2017
  • Quantitative exploration of factors influencing psychotic disorder ailments in Nigeria
    Adebowale O. Adejumo, Nehemiah A. Ikoba, Esivue A. Suleiman, Hilary I. Okagbue, Pelumi E. Oguntunde, Oluwole A. Odetunmibi, Obalowu Job
    Data in Brief, 2017
  • Exploration of solar radiation data from three geo-political zones in Nigeria
    Adebowale O. Adejumo, Esivue A. Suleiman, Hilary I. Okagbue
    Data in Brief, 2017
  • On the flexibility of the transmuted inverse exponential distribution
    Lecture Notes in Engineering and Computer Science, 2017
  • Exponential Inverse Exponential (EIE) distribution with applications to lifetime data
    Pelumi Emmanuel Oguntunde, Adebowale Olusola Adejumo, Enahoro Alfred Owoloko
    Asian Journal of Scientific Research, 2017
  • On the exponentiated generalized inverse exponential distribution
    Lecture Notes in Engineering and Computer Science, 2017
  • The weibull-inverted exponential distribution: A generalization of the inverse exponential distribution
    Lecture Notes in Engineering and Computer Science, 2017
  • A New Generalization of the Lomax Distribution with Increasing, Decreasing, and Constant Failure Rate
    Pelumi E. Oguntunde, Mundher A. Khaleel, Mohammed T. Ahmed, Adebowale O. Adejumo, Oluwole A. Odetunmibi
    Modelling and Simulation in Engineering, 2017
  • The burr X-exponential distribution: Theory and applications
    Lecture Notes in Engineering and Computer Science, 2017
  • An investigation of dynamic influence to doctors' stress in government hospitals in Nigeria using logistic regression approach
    Lecture Notes in Engineering and Computer Science, 2017
  • Assessment of jebba hydropower dam operation for improved energy production and flood management
    Arpn Journal of Engineering and Applied Sciences, 2016
  • A comparative analysis on the performance of the convoluted exponential distribution and the exponential distribution in terms of flexibility
    Enahoro Alfred Owoloko, Pelumi Emmanuel Oguntunde, Adebowale Olusola Adejumo
    Journal of Mathematics and Statistics, 2016
  • Statistical properties and applications of a new lindley exponential distribution
    Gazi University Journal of Science, 2016
  • On the exponentiated generalized weibull distribution: A generalization of the weibull distribution
    P. E. Oguntunde, O. A. Odetunmibi, A. O. Adejumo
    Indian Journal of Science and Technology, 2015
  • Performance rating of the transmuted exponential distribution: an analytical approach
    Enahoro A. Owoloko, Pelumi E. Oguntunde, Adebowale O. Adejumo
    Springerplus, 2015
  • Drying kinetics of unripe plantain chips using charcoal fuelled cabinet dryer
    Agricultural Engineering International Cigr Journal, 2015
  • A study of probability models in monitoring environmental pollution in Nigeria
    P. E. Oguntunde, O. A. Odetunmibi, A. O. Adejumo
    Journal of Probability and Statistics, 2014
  • A study of HIV sero-prevalence surveillance survey data using loglinear model
    Global Journal of Pure and Applied Mathematics, 2013
  • Diabetic care in Nigeria: Report of a self-audit
    E.O Okoro, A.O Adejumo, B.A Oyejola
    Journal of Diabetes and Its Complications, 2002

RECENT SCHOLAR PUBLICATIONS

  • A Time Series Investigation of Currency Circulation Dynamics in Nigeria
    CA Awogbemi, AK Ilori, I Muhammed, J Daniel, H Alilu, BP Huleji, ...
    Scientia. Technology, Science and Society 2 (6), 54-61 , 2025
    2025
    Citations: 1
  • A MODIFIED BIASING RIDGE ESTIMATORS FOR ADDRESSING MULTICOLLINEARITY PROBLEM IN LINEAR REGRESSION MODEL
    MA Adedoyin, OJ Oladapo, AO Adejumo
    Journal of the Royal Statistical Society Nigeria Group (JRSS-NIG Group) ISSN … , 2025
    2025
    Citations: 1
  • An exploration of Nigerian exchange rate using ARIMA model
    CA Awogbemi, H Alilu, AK Ilori, J Daniel, BP Huleji, MS Omotayo-Tomo, ...
    Asian Journal of Probability and Statistics 27 (1), 69-80 , 2025
    2025
    Citations: 2
  • Analyzing Nigeria Monthly Consumer Price Index Using the ARIMA Model
    A CA, J AS, I AK, OT MS, O BI, H BP, P VB, A AO
    Asian Research Journal of Mathematics 21 (1), 1-8 , 2025
    2025
    Citations: 2
  • Modelling the survival rate of breast cancer patients: Non-parametric and semi-parametric approach
    FA Ayinla, AO Adejumo
    International Review of Applied Sciences 11 (1), 31-39 , 2025
    2025
  • ARIMA-based forecasting of Nigerian crude oil prices (2006–2023): Long-term dynamics, optimal model selection, and policy implications
    DE Adewara, AO Adejumo, U Kalu
    International Review of Applied Sciences 11 (1), 22-31 , 2025
    2025
  • Optimizing lassa fever outbreak control: A comparative study on the efficacy of contact tracing integration in epidemiological models
    BO Ajala, AO Adejumo, JA Akinyemi, MI Ekum, V Barrah, JU Barrah-Ajala, ...
    2024
    Citations: 2
  • Some Extended Pareto Type I Distributions
    IV Omekam, J Popoola, NF Gatta, AO Adejumo
    Ife Journal of Science 24 (2), 265-276 , 2022
    2022
    Citations: 2
  • Geo-additive modelling of children under-five sleeping under insecticide treated nets in Nigeria
    AA Adetunji, AJ Ademuyiwa, GN Alo, AO Adejumo
    GeoJournal 87 (4), 2479-2490 , 2022
    2022
    Citations: 4
  • Modified Frechet distributions and their generalized families
    OV Ifeyinwa, OI Adeniyi, OA Adejumo
    Science World Journal 17 (2), 338-345 , 2022
    2022
    Citations: 6
  • Unique clusters of patterns of breast cancer survivorship
    HI Okagbue, PE Oguntunde, PI Adamu, AO Adejumo
    Health and Technology 12 (2), 365-384 , 2022
    2022
    Citations: 8
  • Modeling Covid-19 cases in West African countries: a comparative analysis of quartic curve estimation models and estimators
    K Ayinde, HA Bello, RI Rauf, OM Attah, UI Nwosu, OK Bodunwa, OO Ojo, ...
    Modeling, Control and Drug Development for COVID-19 Outbreak Prevention, 359-454 , 2021
    2021
    Citations: 4
  • Flexibility of Generalized Distributions
    IV Omekam, AO Adejumo
    Royal Statistical Society Nigeria Local Group Annual Conference Proceedings … , 2021
    2021
  • A study of Hepatitis B virus infection using chi-square statistic
    OA Odetunmibi, AO Adejumo, TA Anake
    Journal of Physics: Conference Series 1734 (1), 012010 , 2021
    2021
    Citations: 13
  • Cubic Transmuted Lindley as a Better Distribution in the Family of Rayleigh Distributions
    A Adefowope, IV Omekam, AO Adejumo
    " Tibiscus" University of Timişoara, România , 2020
    2020
  • Goodness of Fit Tests for Some Generalized Distributions
    IV Omekam, AO Adejumo
    tc 1 (1), 1 , 2020
    2020
    Citations: 1
  • Log-linear modelling of effect of age and gender on the spread of hepatitis b virus infection in Lagos state, Nigeria
    OA Odetunmibi, AO Adejumo, TA Anake
    Open Access Macedonian Journal of Medical Sciences 7 (13), 2204 , 2019
    2019
    Citations: 6
  • TIME SERIES ANALYSIS OF BRENT CRUDE OIL PRICES PER BARREL: A BOX-JENKINS APPROACH
    AO Adejumo, J Daniel
    Ann. Comput. Sci. Ser 17 (1), 87-101 , 2019
    2019
    Citations: 1
  • A modified ratio techniques in successive sampling on two occasions
    KO Adetunji, AO Adejumo
    Anale. Seria Informatica 17, 16-25 , 2019
    2019
    Citations: 2
  • Log-Linear Modelling of Effect of Age and Gender on the Spread of Hepatitis B Virus Infection in Lagos State, Nigeria. Open Access Maced J Med Sci. 2019 Jul 15; 7 (13): 2204-2207
    OA Odetunmibi, AO Adejumo, TA Anake
    2019

MOST CITED SCHOLAR PUBLICATIONS

  • The transmuted inverse exponential distribution
    PE Oguntunde, AO Adejumo
    International journal of advanced statistics and probability 3 (1), 1-7 , 2015
    2015
    Citations: 108
  • Performance rating of the transmuted exponential distribution: an analytical approach
    EA Owoloko, PE Oguntunde, AO Adejumo
    SpringerPlus 4 (1), 818 , 2015
    2015
    Citations: 106
  • A new generalization of the Lomax distribution with increasing, decreasing, and constant failure rate
    PE Oguntunde, MA Khaleel, MT Ahmed, AO Adejumo, OA Odetunmibi
    Modelling and Simulation in Engineering 2017 (1), 6043169 , 2017
    2017
    Citations: 104
  • Statistical properties of the exponentiated generalized inverted exponential distribution
    PE Oguntunde, A Adejumo, OS Balogun
    Applied Mathematics 4 (2), 47-55 , 2014
    2014
    Citations: 78
  • Application of ordinal logistic regression in the study of students' performance
    A Adetunji
    2013
    Citations: 70
  • On the sum of exponentially distributed random variables: A convolution approach
    PE Oguntunde, OA Odetunmibi, AO Adejumo
    European Journal of Statistics and Probability 2 (1), 1-8 , 2014
    2014
    Citations: 55
  • The Weibull-inverted exponential distribution: A generalization of the inverse exponential distribution
    PE Oguntunde, AO Adejumo, EA Owoloko
    World Congress on Engineering , 2017
    2017
    Citations: 54
  • The Gompertz inverse exponential (GoIE) distribution with applications
    PE Oguntunde, MA Khaleel, AO Adejumo, HI Okagbue, AA Opanuga, ...
    Cogent Mathematics & Statistics 5 (1), 1507122 , 2018
    2018
    Citations: 47
  • Breast cancer patients in Nigeria: data exploration approach
    PE Oguntunde, AO Adejumo, HI Okagbue
    Data in brief 15, 47 , 2017
    2017
    Citations: 43
  • Application of Kumaraswamy inverse exponential distribution to real lifetime data
    PE Oguntunde, AO Adejumo, EA Owoloko
    International Journal of Applied Mathematics and Statistics 56 (5), 34-47 , 2017
    2017
    Citations: 41
  • Exponential inverse exponential (EIE) distribution with applications to lifetime data
    PE Oguntunde, AO Adejumo, EA Owoloko
    Asian Journal of Scientific Research 10 (3), 169-177 , 2017
    2017
    Citations: 40
  • Statistical properties and applications of a new Lindley exponential distribution
    P Oguntunde, A Adejumo, H Okagbue, M Rastogi
    Gazi University Journal of Science 29 (4), 831-838 , 2016
    2016
    Citations: 39
  • The generalized inverted generalized exponential distribution with an application to a censored data
    PE Oguntunde, AO Adejumo
    Journal of Statistics Applications & Probability 4 (2), 223 , 2015
    2015
    Citations: 37
  • A study of probability models in monitoring environmental pollution in Nigeria
    PE Oguntunde, OA Odetunmibi, AO Adejumo
    Journal of Probability and Statistics 2014 (1), 864965 , 2014
    2014
    Citations: 36
  • Diabetic care in Nigeria: report of a self-audit
    EO Okoro, AO Adejumo, BA Oyejola
    Journal of Diabetes and its Complications 16 (2), 159-164 , 2002
    2002
    Citations: 36
  • On the exponentiated generalized Weibull distribution: A generalization of the Weibull distribution
    PE Oguntunde, OA Odetunmibi, AO Adejumo
    Indian Journal of Science and Technology 8 (35), 1-7 , 2015
    2015
    Citations: 33
  • Development and evaluation of a cassava chipping machine
    AO Adejumo, OB Oradugba, TA Ilori, MO Adenekan
    Journal of Engineering and Applied Sciences 3 (6) , 2011
    2011
    Citations: 25
  • Quantitative exploration of factors influencing psychotic disorder ailments in Nigeria
    AO Adejumo, NA Ikoba, EA Suleiman, HI Okagbue, PE Oguntunde, ...
    Data in brief 14, 175-185 , 2017
    2017
    Citations: 23
  • Assessing the flexibility of the exponentiated generalized exponential distribution
    PE Oguntunde, AO Adejumo, KA Adepoju
    Pacific Journal of Science and Technology 17 (1), 49-57 , 2016
    2016
    Citations: 23
  • Exploration of solar radiation data from three geo-political zones in Nigeria
    AO Adejumo, EA Suleiman, HI Okagbue
    Data in brief 13, 60-68 , 2017
    2017
    Citations: 21

CONSULTANCY

National Mathematical Centre, Abuja, Nigeria

Industry, Institute, or Organisation Collaboration

National Mathematical Centre, Abuja