Target organ damage among subjects with high-normal blood pressure in a Nigerian tertiary health institution

Background: There is paucity of data on the relationship between high – normal blood pressure (BP) and target organ damage (TOD) in sub-Saharan Africa including Nigeria. This study therefore, aimed to assess target organ damage (TOD) among subjects with high – normal BP in comparison with hypertensives and subjects with optimal BP. Materials and Methods: The study was cross-sectional and comparative conducted at Aminu Kano Teaching Hospital, Kano on eligible subjects aged 18 years and above. Three groups comprising of randomly selected subjects (high -normal (group 1), hypertension (group 2) and optimal BP (group 3)), with each group having 100 in number were studied. Funduscopy and relevant investigations including transthoracic echocardiography were carried out. High – normal BP was defined as systolic BP of 130 -139mmHg and/or diastolic BP of 80-89mmHg. Results: The mean age of subjects in group 1 was 27.32 ± 8.20 years and 60% were female, 34.04±6.25 years for group 2 and 53% were female, and 52.81 ± 13.3 years for group 3 and 56% were female (P =