“…Environmental factors reported to be associated with dementia in SSA include the following: increasing age, female sex, positive history of hypertension, hypercholesterolemia, diabetes mellitus, peripheral arterial disease, stroke, low level of education, diet, depressive symptoms, and low body mass index [8, 9, 27, 29, 32, 33, 35, 37, 38, 47, 54]. In an IIDP study, a comparison of smoking history and mean body mass index (BMI) showed that these factors were significantly higher in African-Americans than in the Yoruba suggesting that environmental factors play a significant role in the development of Alzheimer's dementia [23].…”