World Journal of Cardiovascular Diseases, 2015, 5, 181-198 Published Online July 2015 in SciRes. http://www.scirp.org/journal/wjcd http://dx.doi.org/10.4236/wjcd.2015.57021 How to cite this paper: Odusola, A.O., Nelissen, H., Hendriks, M., et al. (2015) How Group-Based Cardiovascular Health Education Affects Treatment Adherence and Blood Pressure Control among Insured Hypertensive Nigerians: A Pre-Test, Post-Test Study. World Journal of Cardiovascular Diseases, 5, 181-198. http://dx.doi.org/10.4236/wjcd.2015.57021 How Group-Based Cardiovascular Health Education Affects Treatment Adherence and Blood Pressure Control among Insured Hypertensive Nigerians: A Pre-Test, Post-Test Study Aina Olufemi Odusola 1,2* , Heleen Nelissen 1 , Marleen Hendriks 1 , Constance Schultsz 1 , Ferdinand Wit 1 , Oladimeji Akeem Bolarinwa 3 , Tanimola Akande 3 , Charles Agyemang 2 , Gbenga Ogedegbe 4 , Kayode Agbede 5 , Peju Adenusi 6 , Akin Osibogun 7 , Karien Stronks 2 , Joke Haafkens 8 1 Department of Global Health, Academic Medical Center, University of Amsterdam, Amsterdam Institute for Global Health and Development, Amsterdam, Netherlands 2 Department of Public Health, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands 3 Department of Epidemiology and Community Health, University of Ilorin Teaching Hospital, Ilorin, Nigeria 4 Division of Health and Behavior, Center for Healthful Behavior Change, Department of Population Health, NYU School of Medicine, New York, USA 5 Ogo Oluwa Hospital, Bacita, Nigeria 6 Hygeia Community Health Care, Hygeia HMO, Lagos, Nigeria 7 Department of Community Health, Lagos University Teaching Hospital, Lagos, Nigeria 8 Department of General Practice, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands Email: * A.O.Odusola@amc.uva.nl , h.nelissen@aighd.org , m.hendriks@aighd.org , schultsz@gmail.com , f.wit@aighd.org , drdeji@yahoo.com , akandetm@yahoo.com , c.o.agyemang@amc.uva.nl , Olug- benga.ogedegbe@nyumc.org , agbedejk@yahoo.com , dradenusi@hygeiahmo.com , akinosibogun@yahoo.co.uk , k.stronks@amc.uva.nl , j.a.haafkens@amc.uva.nl Received 13 June 2015; accepted 27 July 2015; published 30 July 2015 Copyright © 2015 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution-NonCommercial International License (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ Abstract In sub Saharan Africa (SSA), access to affordable hypertension care through health insurance is increasing. But due to poor adherence, hypertension treatment outcomes often remain poor. Pa- tient-centered educational interventions may reverse this trend. Using a pre-test/post-test design, * Corresponding author.