Research Highlights

CBR-SANSCOG & CBR-TLSA – longitudinal cohort studies to identify risk factors for dementia in India

Comparison of dementia prevalence between rural and urban Indians.

Dementia is rising in epidemic proportions in India. However, due to India’s vast diversity, there could be geographical variations including significant rural-urban differences (as some previous Indian studies have shown). In our study, we found that though there was no significant difference in overall prevalence of dementia (Clinical Dementia Rating ? 0.5). Women had higher prevalence than men in rural individuals, whereas this was reverse in urban individuals. These preliminary findings give us direction to explore the causes of these unique gender differences in dementia.


  1. Comparison of age-wise and gender-wise prevalence of dementia in rural Indians from SANSCOG study cohort
  2. Comparison of age-wise and gender-wise prevalence of dementia in urban Indians from TLSA cohort


  1. SANSCOG Study Team. Srinivaspura Aging, Neuro Senescence and COGnition (SANSCOG) study: Study Protocol. Alzheimer’s & Dementia, 2022 (In Press).
  2. Jonas Sundarakumar, Ganesh Chauhan, Abhishek ML, Girish N Rao, Palanimuthu T Sivakumar Naren P Rao, Vijayalakshmi Ravindranath & SANSCOG and TLSA Study Teams. Srinivaspura Aging, Neuro Senescence and COGnition (SANSCOG) study and Tata Longitudinal Study on Aging (TLSA): Study Protocols. Poster presentation: Alzheimer’s Association International Conference, July 27-31, 2020.
  3. Jonas Sundarakumar, Shafeeq K Shahul Hameed, Abhishek ML, Shubham Jain, SANSCOG & TLSA Study Teams, Vijayalakshmi Ravindranath. Prevalence of neuropsychiatric conditions and cognitive impairment in two parallel, aging study cohorts from rural and urban India. Alzheimer’s & Dementia, 2022 (In Press).

Last Updated on February 21, 2023

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