Table 2. Key terms for article screening during developing search strategy.

Concept	Search terms (Combined with OR/AND)
Population group	(Adults) OR (Male) OR (Female) OR (Older adults) OR (Older population) OR (Older population) OR (Senior citizen) OR (Geriatric group) OR (Ageing population)
Geographical region (South Asia)	(South Asia*) OR (South Asian Region) OR (South Asian Country*) OR (Southern Asia) OR (Afghanistan*) OR (Bangladesh*) OR (Bhutan*) OR (India*) OR (Sri Lanka*) OR (Maldives*) OR (Nepal*) OR (Pakistan*) OR (Lanka) OR (Ceylon)
Geographical region (Southeast Asia)	(Southeast Asia*) OR (South East Asian Region) OR (Southeast Asian country*) OR (Brunei*) OR (Cambodia*) OR (Indonesia*) OR (Laos*) OR (Malaysia*) OR (Myanmar*) OR (Philippines*) OR (Singapore*) OR (Thailand*) OR (Timor-Leste*) OR (Vietnam*)
Disease terms	(Alzheimer’s disease) OR (Alzheimer disease) OR (Alzheimer’s dementia) OR (Dementia) OR (Alzheimer’s disease related dementia) OR (Cognitive decline) OR (Mild cognitive impairment) OR (Neurodegenerative disorder) OR (AD*) OR (ADRD)
Epidemiological concepts	(Epidemiology*) OR (Prevalence) OR (Incidence) OR (Trends) OR (Risk factors) OR (Associated factors) OR (Triggering factors) OR (Determinants) OR (Modifiable factors) OR (Non-modifiable factors) OR (Protective factors) OR (Contributing factors)