The Association of Inorganic Arsenic Exposure with Hypertension and High Blood Pressure Among African Caribbean Adults in Tobago

Arsenic is among the most important environmental toxicants contributing to the global prevalence of hypertension. Multiple studies have reported a greater burden of hypertension among people of African ancestry, yet the contribution of environmental factors to this burden is unclear. Therefore, we investigated the association of arsenic exposure with increased risk of hypertension and high blood pressure in 965 Afro-Caribbean adults in the Tobago Health Study. Linear and logistic regression analyses were conducted for the total cohort and stratified by sex and age separately. We also examined potential effect modification by sex. Each unit (μg/L) increase in ΣAs was associated with 2% higher odds of hypertension in the total cohort and 4% higher odds among women. Higher ΣAs was associated with higher diastolic blood pressure and mean arterial pressure (MAP) among men. The associations of higher ΣAs with hypertension among women and with higher MAP among men were significant only in mid-life but not in older age. The data suggest effect modification by sex for the relationship between ΣAs and MAP in men. The findings suggest that exposure to inorganic arsenic contributes to age- and sex-specific patterns for greater risks of hypertension and high blood pressure among Afro-Caribbean adults.