Publications by authors named "Osi Adeleye"

5 Publications

  • Page 1 of 1

Frequency and factors associated with post-stroke seizures in a large multicenter study in West Africa.

J Neurol Sci 2021 Aug 9;427:117535. Epub 2021 Jun 9.

Federal Medical Centre, Abeokuta, Nigeria; Center for Genomic and Precision Medicine, College of Medicine, University of Ibadan, Nigeria.

Background: Post-stroke seizures (PSS) are associated with significant morbidity and mortality across the globe. There is a paucity of data on PSS in Africa.

Purpose: To assess the frequency and factors associated with PSS by stroke types across 15 hospitals in Nigeria and Ghana.

Methods: We analyzed data on all stroke cases recruited into the Stroke Investigative Research and Educational Network (SIREN). We included adults aged ≥18 years with radiologically confirmed ischemic stroke (IS) or intracerebral hemorrhage (ICH). PSS were defined as acute symptomatic seizures occurring at stroke onset and/or during acute hospitalization up until discharge. We used logistic regression to estimate adjusted odds ratios (aOR) with 95% Confidence Interval.

Results: Among 3344 stroke patients, 499 (14.9%) had PSS (95% CI: 13.7-16.2%). The mean duration of admission in days for those with PSS vs no PSS was 17.4 ± 28.6 vs 15.9 ± 24.7, p = 0.72. There were 294(14.1%) PSS among 2091 ischemic strokes and 159(17.7%) among 897 with ICH, p = 0.01. The factors associated with PSS occurrence were age < 50 years, aOR of 1.59 (1.08-2.33), National Institute of Health Stroke Score (NIHSS), 1.29 (1.16-1.42) for each 5 units rise and white cell count 1.07 (1.01-1.13) for each 10^3 mm rise. Factors associated with PSS in ischemic were NIHSS score, aOR of 1.17 (1.04-1.31) and infarct volume of 10-30 cm aOR of 2.17(1.37-3.45). Among ICH, associated factors were alcohol use 5.91 (2.11-16.55) and lobar bleeds 2.22 (1.03-4.82).

Conclusion: The burden of PSS among this sample of west Africans is substantial and may contribute to poor outcomes of stroke in this region. Further longitudinal studies are required to understand the impact on morbidity and mortality arising from PSS in Africa.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
August 2021

Unraveling the risk factors for spontaneous intracerebral hemorrhage among West Africans.

Neurology 2020 03 19;94(10):e998-e1012. Epub 2020 Feb 19.

From Kwame Nkrumah University of Science and Technology (F.S.S., L.A., A. Singh, D.O.), Kumasi, Ghana; University of California (B.O.), San Francisco; Medical University of South Carolina (M.G., D.L., C.J., F.M.), Charleston; College of Medicine (O. Akpa, G. Ogbole, M.O., J.A., A.O., A. Adeoye, L. Ogunjimi, O. Arulogun, F.A., O. Ogah, A. Makanjuola, O. Adebayo, A. Agunloye, S.L., S.D., M.F., C.E.), University of Ibadan, Nigeria; University of Ghana Medical School (A. Akpalu, R.L., B.C.-T.), Accra; University of Ilorin Teaching Hospital (K.W., L. Oyinloye, P.K., E.S.); Federal Medical Centre (R.A., O. Adeleye), Abeokuta; Ahmadu Bello University (R.O., O.B., V.S., H.I.), Zaria; Obafemi Awolowo University Teaching Hospital (M.K., B.F., O. Ajose, S.O.), Ile-Ife; Aminu Kano Teaching Hospital (L. Owolabi, A. Mande), Kano, Nigeria; University of Kentucky (D.A.), Lexington; University of Alabama at Birmingham (H.T.); University of Cambridge (H.S.M.), UK; Delta State University Teaching Hospital (O. Olugbo); Jos Teaching Hospital (G. Osaigbovo, A. Salaam, G.A., C.I.), Plateau State; Federal Medical Centre (I.C.), Umuahia, Abia State; Federal Medical Centre (T.S.), Owo, Ondo State; and Ladoke Akintola University of Technology Teaching Hospital (A. Akintunde), Ogbomosho, Oyo State, Nigeria.

Objective: To characterize risk factors for spontaneous intracerebral hemorrhage (sICH) occurrence and severity among West Africans.

Methods: The Stroke Investigative Research and Educational Network (SIREN) study is a multicenter case-control study involving 15 sites in Ghana and Nigeria. Patients were adults ≥18 years old with CT-confirmed sICH with age-, sex-, and ethnicity-matched stroke-free community controls. Standard instruments were used to assess vascular, lifestyle, and psychosocial factors. Factors associated with sICH and its severity were assessed using conditional logistic regression to estimate odds ratios (ORs) and population-attributable risks (PARs) with 95% confidence intervals (CIs) for factors.

Results: Of 2,944 adjudicated stroke cases, 854 were intracerebral hemorrhage (ICH). Mean age of patients with ICH was 54.7 ± 13.9 years, with a male preponderance (63.1%), and 77.3% were nonlobar. Etiologic subtypes of sICH included hypertension (80.9%), structural vascular anomalies (4.0%), cerebral amyloid angiopathy (0.7%), systemic illnesses (0.5%), medication-related (0.4%), and undetermined (13.7%). Eight factors independently associated with sICH occurrence by decreasing order of PAR with their adjusted OR (95% CI) were hypertension, 66.63 (20.78-213.72); dyslipidemia, 2.95 (1.84-4.74); meat consumption, 1.55 (1.01-2.38); family history of CVD, 2.22 (1.41-3.50); nonconsumption of green vegetables, 3.61 (2.07-6.31); diabetes mellitus, 2.11 (1.29-3.46); stress, 1.68 (1.03-2.77); and current tobacco use, 14.27 (2.09-97.47). Factors associated with severe sICH using an NIH Stroke Scale score >15 with adjusted OR (95% CI) were nonconsumption of leafy green vegetables, 2.03 (1.43-2.88); systolic blood pressure for each mm Hg rise, 1.01 (1.00-1.01); presence of midline shift, 1.54 (1.11-2.13); lobar ICH, 1.72 (1.16-2.55); and supratentorial bleeds, 2.17 (1.06-4.46).

Conclusions: Population-level control of the dominant factors will substantially mitigate the burden of sICH in West Africa.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
March 2020

Unraveling the Ethical, Legal, and Social Implications of Neurobiobanking and Stroke Genomic Research in Africa: A Study Protocol of the African Neurobiobank for Precision Stroke Medicine ELSI Project.

Int J Qual Methods 2020 Jan-Dec;19. Epub 2020 Jun 23.

Neuroscience and Ageing Research Unit, Institute for Advanced Medical Research and Training, College of Medicine, University of Ibadan, Nigeria.

The ethical, legal, and social implications (ELSI) of emerging neurobiobanks and data resources are unclear in an African scientific landscape with unique cultural, linguistic, and belief systems. The overarching goal of the African Neurobiobank for Precision Stroke Medicine-ELSI Project is to identify, examine, and develop novel approaches to address ELSI issues of biobanking and stroke genomic research in sub-Saharan Africa (SSA). To accomplish the goal we will (1) explore knowledge, attitude, perceptions, barriers, and facilitators influencing ELSI issues related to biobanking and stroke genomic research; (2) use information obtained to craft a community intervention program focused on ELSI issues; and (3) build capacity and careers related to genomics and biobanking for effective client/community engagement while enhancing regulatory, governance, and implementation competences in biobanking science in SSA. A community-based participatory research and mixed-methodological approach, focused on various levels of the social ecological model, will be used to identify and examine relevant ELSI issues. Contextual intervention tools, platforms, and practices will be developed to enhance community understanding and participation in stroke biobanking and genomics research activities while facilitating enduring trust, and equitable and fair utilization of biobanking resources for genetic and trans-omics research. A concurrent capacity building program related to genetic counseling and biobanking will be implemented for early career researchers. The huge potential for neurobiobanking and genomics research in Africa to advance precision medicine applicable to stroke and other neurological disorders requires addressing ELSI challenges while building sustainable research, career, and regulatory capacities in trans-omics and biobanking science.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
June 2020

Knowledge, attitudes and practices of West Africans on genetic studies of stroke: Evidence from the SIREN Study.

Int J Stroke 2019 01 24;14(1):69-79. Epub 2018 Jul 24.

7 Aminu Kano Teaching Hospital, Bayero University, Kano, Nigeria.

Background: It is crucial to assess genomic literacy related to stroke among Africans in preparation for the ethical, legal and societal implications of the genetic revolution which has begun in Africa.

Objective: To assess the knowledge, attitudes and practices (KAP) of West Africans about stroke genetic studies.

Methods: A comparative cross-sectional study was conducted among stroke patients and stroke-free controls recruited across 15 sites in Ghana and Nigeria. Participants' knowledge of heritability of stroke, willingness to undergo genetic testing and perception of the potential benefits of stroke genetic research were assessed using interviewer-administered questionnaire. Descriptive, frequency distribution and multiple regression analyses were performed.

Results: Only 49% of 2029 stroke patients and 57% of 2603 stroke-free individuals knew that stroke was a heritable disorder. Among those who knew, 90% were willing to undergo genetic testing. Knowledge of stroke heritability was associated with having at least post-secondary education (OR 1.51, 1.25-1.81) and a family history of stroke (OR 1.20, 1.03-1.39) while Islamic religion (OR=0.82, CI: 0.72-0.94), being currently unmarried (OR = 0.81, CI: 0.70-0.92), and alcohol use (OR = 0.78, CI: 0.67-0.91) were associated with lower odds of awareness of stroke as a heritable disorder. Willingness to undergo genetic testing for stroke was associated with having a family history of stroke (OR 1.34, 1.03-1.74) but inversely associated with a medical history of high blood pressure (OR = 0.79, 0.65-0.96).

Conclusion: To further improve knowledge of stroke heritability and willingness to embrace genetic testing for stroke, individuals with less formal education, history of high blood pressure and no family history of stroke require targeted interventions.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
January 2019

Biobanking in a Challenging African Environment: Unique Experience from the SIREN Project.

Biopreserv Biobank 2018 Jun 7;16(3):217-232. Epub 2018 May 7.

Neurology Unit, Department of Medicine, Federal Medical Center, Umuahia, Nigeria.

Africa was previously insufficiently represented in the emerging discipline of biobanking despite commendable early efforts. However, with the Human, Heredity, and Health in Africa (H3Africa) initiative, biorepository science has been bolstered, regional biobanks are springing up, and awareness about biobanks is growing on the continent. The Stroke Investigative Research and Educational Network (SIREN) project is a transnational, multicenter, hospital and community-based study involving over 3000 cases and 3000 controls recruited from 16 sites in Ghana and Nigeria. SIREN aims to explore and unravel the genetic and environmental factors that interact to produce the peculiar phenotypic and clinical characteristics of stroke as seen in people of African ancestry and facilitate the development of new diagnostics, therapeutics, and preventative strategies. The aim of this article is to describe our experience with the development of the procedure for collection, processing, storage, and shipment of biological samples (blood, serum, plasma, buffy coat, red cell concentrates, and DNA) and brain imaging across coordinating and participating sites within the SIREN Project. The SIREN network was initiated in 2014 with support and funding from the H3Africa Initiative. The SIREN Biobank currently has 3015 brain images, 92,950 blood fractions (serum, plasma, red cell concentrates, and buffy coat) accrued from 8450 recruited subjects, and quantified and aliquoted good-quality DNA extracts from 6150 study subjects. This represents an invaluable resource for future research with expanding genomic and trans-omic technologies. This will facilitate the involvement of indigenous African samples in cutting-edge stroke genomics and trans-omics research. It is, however, critical to effectively engage African stroke patients and community members who have contributed precious biological materials to the SIREN Biobank to generate appropriate evidence base for dealing with ethical, legal, and social issues of privacy, autonomy, identifiability, biorights, governance issues, and public understanding of stroke biobanking in the context of unique African culture, language, and belief systems.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
June 2018