Gafar Matanmi Oyeyemi
@unilorin.edu.ng
Professor of Statistics, Head of Department, Department of Statistics, Faculty of Physical Sciences
Department of Statistics, University of Ilorin
RESEARCH, TEACHING, or OTHER INTERESTS
Statistics and Probability, Statistics, Probability and Uncertainty
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Gafar Matanmi Oyeyemi, George Chinanu Mbaeyi, Saheed Ishola Salawu, and Bernard Olagboyega Muse
Informa UK Limited
ABSTRACT A discrimination procedure, based on the location model is described and suggested for use in situation where the discriminating variables are mixtures of continuous and binary variables. Some procedures that have been previously employed, in a similar situation, like Fisher's linear discriminant function and the logistic regression were compared with this method using error rate (ER). Optimal ERs for these procedures are reported using real and simulated data for the case of varying sample size and number of continuous and binary variables and were used as a measure for assessing the performance of the various procedures. The suggested procedure performed considerably better in the cases considered and never did produce a result that is poor when compared with other procedures. Hence, the suggested procedure might be considered for such situations.
ML Adeoti, AS Oguntola, EO Akanni, OS Agodirin, and GM Oyeyemi
Medknow
BACKGROUND
There is an indication of the possibility of the direct or indirect influence of trace element in the development and prevention of malignant diseases, the contribution of the trace elements in the etiology of breast cancer has been under scrutiny.
AIMS
The aim of this study was to determine the serum concentration of trace element in serum of female patients with breast cancer in comparison with healthy controls.
SETTINGS
Breast Clinic of the Department of Surgery LAUTECH University teaching hospital Osogbo, in south-western Nigeria.
MATERIALS AND METHODS
A cross-sectional age matched controlled prospective study wherein the venous blood sample of 30 patients with breast cancer and 30 healthy volunteers as controls were analyzed using atomic absorption spectrophotometry. The collected data were analyzed using statistical package for the social sciences (SPSS Inc) 16.
RESULT
The mean serum concentration of the copper, zinc and selenium were 95.3 ± 4.9 ug/dl and 65.2 ± 15 ug/dl, 62.7 ± 15.7 ug/dl and 93.5 ± 7.2 ug/dl, 45.0 ± 4.6 ug/l and 76.4 ± 8.9 ug/l in the two groups respectively. The concentrations of copper and copper-zinc ratio (C/Z) were significantly higher in the cancer bearing group compared to the controls (C/Z 1.6 ± 0.5 against 0.70 ± 0.14 the P < 0.01). The concentration of zinc and selenium in the venous blood of the breast cancer patients showed inverse relationship while that of the control showed a direct relationship (-0.03 against 0.09). In the breast cancer patients the correlation of copper and zinc, copper and selenium and zinc and selenium showed inverse relationships, none of the relationships was statistically significant.
CONCLUSION
We found a significant association between the serum concentration of trace elements and breast cancer.
Godwin Tunde Arosanyin, Adekunle Taiwo Olowosulu, and Gafar Matanmi Oyeyemi
Informa UK Limited
The reduction of road crashes and injuries among motorcyclists in Nigeria requires a system inquiry into some safety issues at pre-crash, crash and post-crash stages to guide action plans. This paper examines safety issues such as age restriction, motorcycle engine capacity, highway code awareness, licence holding, helmet usage, crash involvement, rescue and payment for treatment among commercial motorcyclists. The primary data derived from a structured questionnaire administered to 334 commercial motorcyclists in Samaru, Zaria were analysed using descriptive statistics and logistic regression technique. There was total compliance with age restriction and motorcycle engine capacity. About 41.8% of the operators were not aware of the existence of the highway code. The odds of licence holding increased with highway code awareness, education with above senior secondary as the reference category and earnings. The odds of crash involvement decreased with highway code awareness, earnings and mode of operation. About 84% of the motorcyclists did not use crash helmet, in spite of being aware of the benefit, and 65.4% of motorcycle crashes was found to be with other road users. The promotion of safety among motorcyclists therefore requires strict traffic law enforcement and modification of road design to segregate traffic and protect pedestrians.