Abstract
The increased prevalence of cardiovascular disease risk factors in sub-Saharan Africa has increased the incidence of cardiovascular disease in this region but whether psychological distress contributes to this observed increased risk remains largely unclear. The aim of this study was to investigate the association between cardiovascular function and psychological distress in urbanised black South African men (n = 101) and women (n = 99). Resting cardiovascular variables were obtained by making use of the Finometer device and 24-hour ambulatory blood pressure (BP) measurements with the Cardiotens apparatus. Psychological questionnaires assessed the perception of health (General Health questionnaire) and depression status (DSM-IV criteria). The resting ECG (NORAV PC-1200) was used to determine left ventricular hypertrophy (LVH) by making use of the Cornell product. Confounders included age, obesity, alcohol intake, smoking and physical activity. The hypertensive groups were overweight, with lower vascular compliance and higher LVH (only men) compared to the normotensive groups. In hypertensive men, perception of health (somatic symptoms) was positively associated with blood pressure, while in hypertensive women it was associated with heart rate. Major depression was associated with LVH in hypertensive men and mean arterial pressure in hypertensive women. LVH and depression showed odds ratios of 1.02 (95% CI: 0.997-1.05) and 1.15 (95% CI: 1.01-1.32), respectively, in predicting hypertension in women. Psychological distress was associated with higher blood pressure in hypertensive African men but also with the development of left ventricular hypertrophy in hypertensive African men and women.
Highlights
The increased prevalence of cardiovascular disease risk factors in sub-Saharan Africa has increased the incidence of cardiovascular disease in this region but whether psychological distress contributes to this observed increased risk remains largely unclear
The main findings of this study were that in HT men, blood pressure (SBP and DBP) was associated with the perception of more somatic symptoms and left ventricular hypertrophy (LVH), while LVH was associated with depression (p = 0.001)
In HT women, heart rate (HR) was associated with the perception of more somatic symptoms and mean arterial pressure (MAP) was associated with depression
Summary
The increased prevalence of cardiovascular disease risk factors in sub-Saharan Africa has increased the incidence of cardiovascular disease in this region but whether psychological distress contributes to this observed increased risk remains largely unclear. The aim of this study was to investigate the association between cardiovascular function and psychological distress in urbanised black South African men (n = 101) and women (n = 99). The aim of this study was to investigate whether there is a relationship between cardiovascular function and psychological distress in hypertensive and normotensive urbanised black Africans of the North West province of South Africa.
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