Over 90% of dementia cases in China are undetected

A survey of 7,072 older adults in six provinces across China, with one rural and one urban community in each province, has identified 359 older adults with dementia and 328 with depression. There were only 26 participants who had doctor-diagnosed dementia reported and 26 who had doctor-diagnosed depression. Overall, 93% of dementia cases and 93% of depression were not detected.

Undetected dementia was strongly associated with low socioeconomic status such as a low educational and occupational class, and living in a rural area.

In comparison, research in high income countries has found that about 60% of older adults with dementia are not diagnosed, and generally there has not been a strong association between low socioeconomic status and undetected dementia. One factor in China’s high rate may be that most older Chinese live with their families, who may be inclined to see dementia as a normal part of aging.

http://www.eurekalert.org/pub_releases/2013-07/kcl-o9072413.php

 

New estimates of dementia in China

A new review of 89 studies, involving more than 340,000 participants in total, has estimated that 9.19 million people in China had dementia in 2010, of whom 5.69 million had Alzheimer’s disease. Previous studies appear to have considerably underestimated the true burden of dementia in China, largely due to limited data availability. However, this study examined a much wider range of data sources than earlier studies, including many Chinese-language reports.

Of the 340 247 participants, 6357 had Alzheimer's disease (1.87%). Of 254,367 assessed for other forms of dementia, 3543 (1.4%) had vascular dementia, frontotemporal dementia, or Lewy body dementia.

Total dementia prevalence in 1990 was 1·8% at 65-69 years, and 42·1% at age 95-99 years; in 2010, prevalence had increased to 2·6% and 60·5%, respectively.

Prevalence was higher for women than men, but didn't differ significantly between urban and rural residents.

http://www.eurekalert.org/pub_releases/2013-06/l-mco060513.php

[3561] Chen, R., Hu Z., Chen R-L., Ma Y., Zhang D., & Wilson K.
(2013).  Determinants for undetected dementia and late-life depression.
The British Journal of Psychiatry. 203(3), 203 - 208.

[3559] Chan, K Y., Wang W., Wu J J., Liu L., Theodoratou E., Car J., et al.
(2013).  Epidemiology of Alzheimer's disease and other forms of dementia in China, 1990–2010: a systematic review and analysis.
The Lancet. 381(9882), 2016 - 2023.

Related News

A study involving 254 people with dementia living at home has found that 99% of people with dementia and 97% of their caregivers had one or more unmet needs, 90% of which were safety-related.

A new U.S. study suggests that Alzheimer's disease and other dementias are markedly under-reported on death certificates and medical records. Death certificates tend to only provide an immediate cause, such as pneumonia, and don’t mention the underlying condition that provoked it.

It’s often argued that telling people that they carry genes increasing their risk of Alzheimer’s will simply upset them to no purpose. A new study challenges that idea.

11 new genetic susceptibility factors for Alzheimer’s identified

Understanding a protein's role in familial Alzheimer's disease

Analysis of data from 237 patients with mild cognitive impairment (mean age 79.9) has found that, compared to those carrying the ‘normal’ ApoE3 gene (the most common variant of the ApoE gene), the ApoE4 carriers showed markedly greater rates of shrinkage in 13 of 15 brain regions thought to be k

Analysis of data from more than 8,000 people, most of them older than 60, has revealed that, among the 5,000 people initially tested cognitively normal, carrying one copy of the “Alzheimer’s gene” (ApoE4) only slightly increased men’s risk of developing

Analysis of 700 subjects from the Alzheimer's Disease Neuroimaging Initiative has revealed a genetic mutation (rs4728029) that’s associated with people who develop Alzheimer’s pathology but don’t show clinical symptoms in their lifetime.

Analysis of brain scans and cognitive scores of 64 older adults from the NIA's Baltimore Longitudinal Study of Aging (average age 76) has found that, between the most cognitively stable and the most declining (over a 12-year period), there was no significant difference in the total amount of amy

A pilot study involving 94 older adults, of whom 18 had Alzheimer’s, 24 had

Pages

Subscribe to Latest newsSubscribe to Latest newsSubscribe to Latest health newsSubscribe to Latest news