Table 3.

Proportions of VaD estimated from Dementia prevalence estimates in various countries in Africa

Country, Location; Type of sample	Sample size, Age (yrs)*	Dementia Prevalence (%)	Alzheimer’s Disease (%)	VaD (%)	Reference
Africa, 10 countries; Community		2.4%	57%	27%	[50]
SSA, 5 countries (Benin, Botswana, CAR, Congo, Nigeria); Community/clinic¶	10,413; >65 yrs	0–10%	54–83%	8–31%	[85]
Nigeria, Abeokuta/Ibadan; Hospital/ Clinic	240,294;	0.05%	57%	17%	[16]
Egypt, Al Kharga District; Community	8173, >50 yrs	2.3%	51%	29%	[45]
South Africa, Durban; Hospital	140; >60 yrs‡	8%	-	40%	[121]
Egypt, Al-Quseir city,	2,222; >60 yrs†	3.8%	48%	37% (1.4%)†	[44]
Tanzania, Hai District; Community	1198; >60 yrs	6.4%	48%	41% (2.6%)††	[112],[111]
Egypt, Quena/Aswan; Community	691; >60 yrs†	5.1%	-	-	[73]
Congo, Brazzaville, Bangui, CAR; Community	910;	6.1%	69,%, 83%	31%, 18%	[129]

Data summarised from several references as shown. VaD cases in prospective stroke survivors studies not included [7, 131].

^*Age in years (yrs) shows youngest age from which sample was screened.

^¶Range shown from studies in 4 SSA countries included in the analysis [85].

^†Dementia was 2.0% in >50 year olds, 3.8% >60 years and 13.5%–100% in individuals over age 80 years [44].

^††Crude prevalence rate [111].

^‡Vascular risk factors were strongly associated with 80% of dementia cases.

Abbreviations: CAR, Central African Republic, SSA, sub-Saharan Africa.