Abnormal haemoglobin levels linked to risk of dementia
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A new study has linked low and high haemoglobin levels to an increased risk of developing dementia in the future. The study titled ‘Haemoglobin and anaemia in relation to dementia risk and accompanying changes on brain MRI’ was published in the July 31, 2019, online issue of Neurology.

The study involved 12,305 people with an average age of 65 who did not have dementia. Overall, 745 (6%) of the study subjects were found to have anaemia. The researchers followed the participants for an average of 12 years. During that time, 1,520 people developed dementia. Of these, 1,194 had Alzheimer’s.

Subjects who had anaemia were 41% more likely to develop Alzheimer’s and 34% more likely to develop any type of dementia compared to those who did not have anaemia. Of the 745 people with anaemia, 128 developed dementia compared to 1,392 of the 11,560 who did not have anaemia.

The findings should ring a warning bell for developing countries, including India, said Bengaluru-based doctors. “In terms of public health importance, the association with anaemia is more relevant for our setting as it is very common in the elderly and particularly those with poor socio-economic status. The study confirmed the previously known relationship of anaemia and increased risk for dementia with a more rigorous methodology,” said P.T. Sivakumar, professor of psychiatry, NIMHANS

Source: https://www.thehindu.com/sci-tech/health/abnormal-haemoglobin-levels-linked-to-risk-of-dementia-study/article28827223.ece
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