Risk Factor Characterization of Ischemic Stroke Subtypes Among West Africans

Author:

Sarfo Fred S.1ORCID,Ovbiagele Bruce2ORCID,Akpa Onoja34,Akpalu Albert5ORCID,Wahab Kolawole6ORCID,Obiako Reginald7ORCID,Komolafe Morenikeji4ORCID,Owolabi Lukman8,Ogbole Godwin9ORCID,Calys-Tagoe Benedict10ORCID,Fakunle Adekunle11,Sanni Taofeek12,Mulugeta Gebregziabher13ORCID,Abdul Salaam14,Akintunde Adeseye A.15,Olowookere Samuel4,Uvere Ezinne O.11,Ibinaiye Philip7ORCID,Akinyemi Joshua5,Uwanuruochi Kelechukwu16ORCID,Olayemi Balogun7,Odunlami Olufemi A.17,Abunimye Esther8ORCID,Arulogun Oyedunni18ORCID,Isah Suleiman Y.8ORCID,Abubakar Sani A.7,Oladimeji AdebayoORCID,Adebayo Philip19,Shidali Vincent20,Chukwuonye Innocent I.16ORCID,Akpalu Josephine10ORCID,Tito-Ilori Moyinoluwalogo M.11,Asowata Osahon J.2318,Sanya Emmanuel O.6,Amusa Ganiyu14ORCID,Onyeonoro Ugochukwu16ORCID,Ogunmodede James A.6ORCID,Sule Abdullateef G.7,Akisanya Cynthia17ORCID,Mensah Yaw21,Oyinloye Olalekan I.6,Appiah Lambert22,Agunloye Atinuke M.5,Osaigbovo Godwin O.14,Olabinri Eunice12ORCID,Kolo Philip M.6,Okeke Obiora16,Adeoye Abiodun M.5ORCID,Ajose Olabamiji5,Jenkins Carolyn13,Lackland Daniel T.13ORCID,Egberongbe Adedeji A.23,Adeniji Olaleye17ORCID,Ohifemen Adeleye Osimhiarherhuo17ORCID,Tiwari Hemant K.24,Arnett Donna25ORCID,Laryea Ruth Y.10,Olunuga Taiwo17,Akinwande Kazeem S.17,Imoh Lucius14,Ogah Okechukwu S.,Melikam Ezinne S.,Adebolaji Adeyemo10,Oguike Wisdom7,Ogunronbi Olumayowa16ORCID,Adeniyi Wasiu17,Olugbo Obiabo Y.26,Bello Abiodun H.6ORCID,Ohagwu Kenneth A.16,Ogunjimi Luqman27ORCID,Agyekum Francis28ORCID,Iheonye Henry29ORCID,Adesina Julius17,Diala Samuel11,Dambatta Hamisu A.8,Ikubor Joyce25ORCID,Singh Arti1,Adamu Sheila22,Obese Vida22,Adusei Nathaniel22,Owusu Dorcas1ORCID,Ampofo Michael22,Tagge Raelle2,Efidi Richard,Fawale Bimbo4,Yaria Joseph,Akinyemi Rufus17ORCID,Owolabi Mayowa11ORCID,

Affiliation:

1. Department of Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana (F.S.S., A.S., D.O.).

2. Weill Institute for Neurosciences, School of Medicine, University of California San-Francisco (B.O., O.J.A., R.T.).

3. Department of Epidemiology and Medical Statistics (O.A., O.J.A.), an College of Medicine, University of Ibadan.

4. Department of Medicine, Obafemi Awolowo University Teaching Hospital, Ile-Ife, Nigeria (M.K., S.O., O.A., B.F.).

5. College of Medicine (J.A., O.A., A.M.A., A.M.A., A.A.), an College of Medicine, University of Ibadan.

6. Department of Medicine, University of Ilorin Teaching Hospital, Nigeria (K.W., E.O.S., J.A.O., O.I.O., P.M.K., A.H.B.).

7. Department of Medicine, Ahmadu Bello University, Zaria, Nigeria (R.O., P.I., B.O., S.A.A., A.G.S., W.O.).

8. Department of Medicine, Aminu Kano Teaching Hospital, Kano, Nigeria (L.O., E.A., S.Y.I., H.A.D.).

9. Department of Radiology (G.O.), an College of Medicine, University of Ibadan.

10. Department of Medicine, University of Ghana Medical School, Accra (A.A., B.C.-T., J.A., R.Y.L.).

11. Department of Medicine (A.F., E.O.U., M.M.T.-I., M.O.,S.D., M.O.), an College of Medicine, University of Ibadan.

12. Federal Teaching Hospital, Ido-Ekiti, Ado-Ekiti, Nigeria (T.S., E.O.).

13. Medical University of South Carolina, Charleston (G.M., C.J., D.T.L.).

14. Jos University Teaching Hospital Jos, Nigeria (S.A., G.A., G.O.O., L.I.).

15. Ladoke Akintola University of Technology/Teaching Hospital, Ogbomosho, Nigeria (A.A.A.).

16. Federal Medical Centre Umuahia, Nigeria (K.U., I.I.C., U.O., O.O., K.A.O.)

17. Federal Medical Centre, Abeokuta, Nigeria (O.A.O., C.A., O.A., O.O.A., T.O., K.S.A., W.A., J.A., R.A.).

18. Preventive Cardiology Research Unit, Institute of Cardiovascular Diseases (O.A., O.J.A.), an College of Medicine, University of Ibadan.

19. University College Hospital, Ibadan, Nigeria Aga Khan University Dar es Salaam, Tanzania (P.A.).

20. Federal Medical Centre, Keffi Zaria, Nigeria (V.S.).

21. Korle Bu Teaching Hospital, Accra, Ghana (Y.M.).

22. Komfo Anokye Teaching Hospital Kumasi, Ghana (L.A., S.A., V.O., N.A., M.A.).

23. Federal Medical Centre, Owo, Ondo State, Nigeria (A.A.E.).

24. University of Alabama at Birmingham, Alabama (H.K.T.).

25. College of Public Health, University of Kentucky (D.A., J.I.).

26. Delta State University/Delta State University Teaching Hospital, Oghara, Nigeria (O.Y.O.).

27. Department of Pharmacology and Therapeutics, Olabisi Onabanjo University. Abeokuta, Nigeria (L.O.).

28. Greater Accra Regional Hospital, Accra, Ghana (F.A.).

29. Federal Medical Centre, Lokoja, Kogi state, Nigeria (H.I.).

Abstract

Background and Purpose: To identify the qualitative and quantitative contributions of conventional risk factors for occurrence of ischemic stroke and its key pathophysiologic subtypes among West Africans. Methods: The SIREN (Stroke Investigative Research and Educational Network) is a multicenter, case-control study involving 15 sites in Ghana and Nigeria. Cases include adults aged ≥18 years with ischemic stroke who were etiologically subtyped using the A-S-C-O-D classification into atherosclerosis, small-vessel occlusion, cardiac pathology, other causes, and dissection. Controls were age- and gender-matched stroke-free adults. Detailed evaluations for vascular, lifestyle, and psychosocial factors were performed. We used conditional logistic regression to estimate adjusted odds ratios with 95% CI. Results: There were 2431 ischemic stroke case and stroke-free control pairs with respective mean ages of 62.2±14.0 versus 60.9±13.7 years. There were 1024 (42.1%) small vessel occlusions, 427 (17.6%) large-artery atherosclerosis, 258 (10.6%) cardio-embolic, 3 (0.1%) carotid dissections, and 719 (29.6%) undetermined/other causes. The adjusted odds ratio (95% CI) for the 8 dominant risk factors for ischemic stroke were hypertension, 10.34 (6.91–15.45); dyslipidemia, 5.16 (3.78–7.03); diabetes, 3.44 (2.60–4.56); low green vegetable consumption, 1.89 (1.45–2.46); red meat consumption, 1.89 (1.45–2.46); cardiac disease, 1.88 (1.22–2.90); monthly income $100 or more, 1.72 (1.24–2.39); and psychosocial stress, 1.62 (1.18–2.21). Hypertension, dyslipidemia, diabetes were confluent factors shared by small-vessel, large-vessel and cardio-embolic subtypes. Stroke cases and stroke-free controls had a mean of 5.3±1.5 versus 3.2±1.0 adverse cardio-metabolic risk factors respectively ( P <0.0001). Conclusions: Traditional vascular risk factors demonstrate important differential effect sizes with pathophysiologic, clinical and preventative implications on the occurrence of ischemic stroke among indigenous West Africans.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Advanced and Specialized Nursing,Cardiology and Cardiovascular Medicine,Neurology (clinical)

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