We do not have high quality data on this, but according to our own study, more than 70% of people living with dementia in Brazil do not have a diagnosis (Nakamura et al., 2015).

References:

Nakamura, A., Opaleye, D., Tani, G., & Ferri, C. P. (2015). Dementia underdiagnosis in Brazil. The Lancet, 385(9966), 418–419. https://doi.org/10.1016/S0140-6736(15)60153-2

According to the findings of the prevalence study conducted by Department of Health and Chinese University of Hong Kong in 2005 (Elderly Commission, 2005), among the 70,000 community-living older people suffering from dementia, 89% of them are not known to any medical services, which means 11% of people with dementia have received a diagnostic assessment at that time. No more updated figures on the diagnostic rate are available.

References:

Elderly Commission. (2005). Prevalence of dementia in Hong Kong. Retrieved from https://www.elderlycommission.gov.hk/en/download/meeting/Study%20on%20Prevalence%20of%20dementia.pdf

1 out of 10 people receive a dementia diagnosis, treatment, or any care in India (Nulkar et al., 2019).

References:

Nulkar A, Paralikar V, Juvekar S. (2019). Dementia in India – a call for action. Journal of Global Health Reports. 2019;3:e2019078. doi:10.29392/joghr.3.e2019078

There has been no research conducted to detect the percentage of people with dementia that have received a diagnostic assessment in Indonesia.

No data was sourced due to a lack of data on dementia diagnosis rates and services in Jamaica.

The prevalence of dementia in Kenya is unknown due to lack of available data.

No data is available on this. In addition to the problems stated in 07.01.01., Mexico does not have a national registry in place at the moment, and therefore, no aggregated data exist.

There is no data on the proportion of people with dementia in NZ who have received a diagnostic assessment due to limitations posed by the “diagnosis gap” as a result of those who have dementia but do not interact with health/social services, those who have dementia diagnosed but not recorded, and those who have cognitive impairment but may not receive a dementia related diagnosis. Furthermore, primary care diagnosis coding is not consistent and outpatient clinic diagnoses are not routinely coded.

See response 07.01.01, no surveillance or descriptive data available on persons living with dementia in South Africa.