Dementia represents one of the fastest-growing neurological challenges in Africa. As life expectancy rises and the population ages, the dementia burden is projected to increase dramatically — far outpacing the continent's current capacity to respond.
Section 9.4 · The Evidence
Statistics on dementia in Africa.
| Indicator | Statistic | Source |
|---|---|---|
| Dementia cases in Central & sub-Saharan Africa (1990) | 228,000 | GBD 2019 Dementia Forecasting, Lancet Public Health |
| Projected dementia cases in Central & sub-Saharan Africa (2050) | 986,000 (330% ↑) | GBD 2019 Forecasting Collaborators |
| Dementia prevalence in elderly African populations | 2%–20% | Karger Neuroepidemiology, 2025 |
| Dementia incidence in Africa | ~15 per 1,000 person-years | Karger, 2025 |
| Unique African dementia risk factor | HIV-related dementia | Akinyemi et al., Alzheimers Dement 2021 |
| Cognitive impairment in Moyamoya disease (global meta-analysis) | 54.59% | Toh et al., JAD 2024 |
Expert Analysis
What the evidence tells us.
A landmark systematic review on dementia in Africa published in Alzheimer's & Dementia highlights that in addition to the well-known Alzheimer's and vascular subtypes, HIV-related dementia plays a specific and uniquely important role in the African burden — a factor not reflected in global models dominated by high-income country data. Parasitic infections such as toxoplasmosis and the neurological sequelae of cerebral malaria also contribute to cognitive impairment in ways rarely captured in standard dementia frameworks.
— Akinyemi et al., Alzheimers Dement, 2022
A 2024 systematic review and meta-analysis found that over half of adult Moyamoya disease patients (54.59%) exhibit cognitive impairment — with executive dysfunction being the most common deficit. This finding is particularly relevant for ANNI's work, given the Founder's personal experience with Moyamoya and the initiative's specific focus on the condition.
— Toh et al., Journal of Alzheimer's Disease, 2024
ANNI's Response
How ANNI is responding to the dementia challenge.
Awareness & Destigmatisation
Public education on early signs of cognitive decline, helping families recognise dementia and reducing stigma that delays diagnosis and care-seeking.
Patient Registries
Establishing African dementia registries capturing region-specific causes like HIV-related dementia and parasitic infections often missing in global datasets.
Caregiver Support
Group support and practical guidance for families living with dementia, addressing both medical and psycho-social challenges.
Cognition Research
Based on Moyamoya-linked cognitive impairment findings, ANNI prioritises research into neurocognitive outcomes in African patients.