P3459Research Network in Africa (RNA): gender differences in cardiovascular risk factors and complications in 12 African countries

Abstract

Abstract Background Cardiovascular diseases are rapidly growing epidemic in Sub-Saharan Africa. Unlike other regions of the world, death rates due to hypertension are greater for women than men in Africa. Scarce data were available on factors associated with gender in cardiovascular risk factors and complications in Sub-Saharan Africa. Purpose To assess gender differences in cardiovascular risk factors pattern in patients with hypertension in 12 Sub-Saharan countries. Methods We conducted a cross-sectional survey in urban clinics of twelve countries in Africa. Data were collected on demographics, treatment and standardized BP measures were made among the hypertensive patients attending the clinics. BP control was defined as BP<140/90 mmHg and hypertension grades were defined according to European Society of Cardiology guidelines. The separate association between women factors and BP control was investigated using Generalized Linear Mixed-Effects Models adjusted on age; A random effect on the country was added (generalized estimated equation models) to account for inter-country variability. Results The EIGHT study enrolled 2198 patients with hypertension in 12 sub-Saharan countries between January 2014 and November 2015. The proportion of women (60,2%) was higher than men and varied significantly according to countries (p<0.001), ranged from 33.7% (Guinea) to 71.9% (Gabon). Mean age was 57.7±12.0 years for women and 59.2±11.4 years for men (p<0.001). Compared to men, women had a higher rate of family cardiovascular background (79% vs 70%, for women and men respectively) (p<0.0001), cardiovascular risk factors (74.3% vs 68.1) (p=0.008), such as obesity (25.8% vs 12.1%) (p<0.0001), sedentary behavior (42.1% vs 35.0%) (p=0,006). BP control didn't differ according to gender, the repartition of grades of hypertension was similar between women and men and proportion of uncontrolled BP was 77.2% in women and 77.8% in men (p=0.4), with same proportion of women and men receiving antihypertensive treatment (96 vs 97.5%) (NS). However, African women had less cardiovascular complications than men (39% vs 52.4%) (p<0.0001) (OR: 0.50 [CI 95% 0.41–0.61]). Conclusions Our study highlighted gender differences in cardiovascular risk factors pattern in Sub-Saharan hypertensive patients. Tailoring medical (public health) programs to improve cardiovascular disease prevention that take into women characteristics may enhance their effectiveness.