BMI and risk of dementia in two million people over two decades: a retrospective cohort study

A large-scale analysis of medical records for nearly two million British people over up to two decades, by Oxon Epidemiology and the London School of Hygiene and Tropical Medicine, has discovered surprising relationships between obesity / body mass index (BMI) and dementia risk.

The evidence indicates that underweight people are most at risk of developing dementia. Underweight people have a 39% higher risk of dementia than people with what is considered to be a healthy weight. People who are overweight, by contrast, appear to benefit from an 18% reduction in dementia risk, and this seemingly rises to 24% for those considered obese.

Reference: Qizilbash, N. Gregson, J. Johnson, ME. [et al] (2015). BMI and risk of dementia in two million people over two decades: a retrospective cohort study. The Lancet Diabetes & Endocrinology. April 9th 2015.

See also:
Middle-age spread ‘seems to reduce dementia risk’. NHS Choices Behind the Headlines, April 10th 2015.

Being overweight ‘reduces dementia risk’. BBC Health News, April 10th 2015.

Behaviour and Pain in People with Dementia Admitted to Acute Hospitals

Research into pain in 230 people with dementia at two hospitals, conducted by University College London, indicates that the occurrence of pain experienced in hospitals may be significantly under-reported. This observational study found around two-thirds (57%) of people with dementia experience pain, but less than 40% are able to report it.

The same researchers found an association between pain and the expression of behavioural and psychological symptoms of dementia (BPSD), such as aggression, agitation and anxiety. BPSD can reflect undetected or under-managed pain, and behaviours perceived as “difficult” can – in turn – contribute to a cycle of poor care in stressful and busy hospital environments.

Reference: Sampson, EL. White, N. [and] Lord, K. [et al] (2015). Pain, agitation, and behavioural problems in people with dementia admitted to general hospital wards: a longitudinal cohort study. PAIN. April 2015, Vol.156(4), pp.675–683.

Aerobic Exercise for Improvement / Preservation of Cognitive Function?

It is widely believed that physical activity supports healthy ageing and helps to prevent cognitive decline, perhaps as a result of improving cardio-respiratory fitness. This systematic review examined the evidence concerning any beneficial influence(s) of aerobic exercise in improving cognitive functioning in older people without cognitive impairment. Twelve trials including 754 participants were considered. There was no discernible benefit from aerobic exercise in any domain of cognitive performance in cognitively healthy older adults, even when the intervention(s) did improve cardio-respiratory fitness.

Young, J. Angevaren, M. [and] Rusted, J. [et al] (2015). Aerobic exercise to improve cognitive function in older people without known cognitive impairment. The Cochrane database of Systematic Reviews. April 22nd 2015

Countries agree to support Call for Action at Global Action against Dementia Conference.

World Health Organisation (WHO) member states have agreed to support a formal Call for Action setting out the intent to tackle dementia on an international scale and provide global leadership. The Call for Action was adopted by most of the countries that attended the First WHO Ministerial Conference on Global Action Against Dementia.

The countries agreed overarching principles and approaches that will be needed in promoting global action against dementia, and have called for a series of actions. More about the Call for Action on the WHO site

Trial begins to investigate diabetes drug’s potential for Alzheimer’s disease | Alzheimer’s Research UK

Trial begins to investigate diabetes drug’s potential for Alzheimer’s disease

It has been reported today that a drug commonly used to treat type 2 diabetes is to be tested in a clinical trial for Alzheimer’s disease. The drug, liraglutide, is to be evaluated in a phase 2 trial of people in the early stages of Alzheimer’s at centres across the UK.

via Trial begins to investigate diabetes drug’s potential for Alzheimer’s disease | Alzheimer’s Research UK.

Eight nutrients to protect the aging brain — ScienceDaily

Eight nutrients to protect the aging brain

Brain health is the second most important component in maintaining a healthy lifestyle according to a 2014 AARP study. As people age they can experience a range of cognitive issues from decreased critical thinking to dementia and Alzheimer’s disease. Researchers write about eight nutrients that may help keep your brain in good shape.

via Eight nutrients to protect the aging brain — ScienceDaily.