Can you bite into an apple? If so, you are more likely to maintain mental abilities, according to new research from Karolinska Institutet in Sweden.

The population is ageing, and the older we become the more likely it is that we risk deterioration of our cognitive functions, such as memory, decision-making and problem solving. Research indicates several possible contributors to these changes, with several studies demonstrating an association between not having teeth and loss of cognitive function and a higher risk of dementia.

One reason for this could be that few or no teeth makes chewing difficult, which leads to a reduction in the blood flow to the brain. However, to date there has been no direct investigation into the significance of chewing ability in a national representative sample of elderly people.

Now a team comprised of researchers from the Department of Dental Medicine and the Aging Research Center (ARC) at Karolinska Institutet and from Karlstad University in Sweden have looked at tooth loss, chewing ability and cognitive function in a random nationwide sample of 557 people aged 77 or older. They found that those who had difficulty chewing hard food such as apples had a significantly higher risk of developing cognitive impairments. This correlation remained even when controlling for sex, age, education and mental health problems, variables that are often reported to impact on cognition. Whether chewing ability was sustained with natural teeth or dentures also had no bearing on the effect.

The results are published in the Journal of the American Geriatrics Society (JAGS). The study was financed with grants from several funds, including the Swedish Council for Working Life and Social Research and the Swedish Research Council.

‘Chewing Ability and Tooth Loss: Association with Cognitive Impairment in an Elderly Population Study’, Duangjai Lexomboon, Mats Trulsson, Inger Wårdh & Marti G. Parker, Journal of the American Geriatrics Society, online early view 4 October 2012.

Karolinska Institutet

Growing older and being overweight are not necessarily associated with a decrease in mental well-being, according to a cross-cultural study looking at quality of life and health status in the US and the UK.

The study, led by Warwick Medical School at the University of Warwick, analysed lifestyle and health patterns in more than 10,000 people in both countries and their links to participants’ mental and physical quality of life and health status.

Quality of life was evaluated using a measure which takes in eight different factors including perception of general health, pain, social functioning and mental health.

The researchers found that people reported better mental quality of life as they age, despite a decrease in physical quality of life.

This is in line with previous research, for example by Professor Andrew Oswald, also at the University of Warwick, which suggests that happiness levels follow a U-shape curve with their lowest point in the mid-40s after which they rise as people move into older age.

Supportive results were found in this cross-cultural comparison study in the UK and US – two countries which have different welfare and health-care systems, factors which could impact on people’s quality of life. [continue reading…]

Older people feel that their health problems pose a challenge to their sense of independence, dignity and identity and sometimes the health care they are given makes things worse.

According to research funded by UK Research Councils’ New Dynamics of Ageing programme (NDA), healthcare providers must avoid taking a ‘blanket view’ of how to help older people cope with the ageing process.

The study carried out by Dr Liz Lloyd and her colleagues found that people were often surprised by the impact that illness and growing old had on their lives. Their sense of ‘self’ was affected by the limitations imposed by their age and illnesses. “Growing old and coming to terms with illnesses is complex and demanding at times – physically, mentally and emotionally,” Dr Lloyd said. “When health goes, it can come as quite a shock.”

The research shows that older people work hard at maintaining their health and independence, while coming to terms with becoming dependent on others. The participants’ views show how, with the struggle to maintain day-to-day activities, their dignity can quickly and easily be lost. One participant, Mary, told researchers:

“Inside I feel as though I ought to be able to do things. But I’m not and it’s hard to accept.”

While some were positive about making changes, others found it harder to adjust their day-to-day routines. All participants made great efforts to find new activities or adapt old ones. For example several learnt to use computers and others took art classes at day centres. All tried to maintain their health in a variety of ways.

Dr Lloyd believes the research shows there are significant differences in the way that people define dignity and independence, and that these are influenced by their relationships, abilities and  life experiences. She states, ”

You can’t impose a blanket view of what dignified care is. Of course, there are certain standards that should apply in all circumstances but enhancing dignity needs a lot more than guaranteeing minimum standards.”

“In old age when your health fails, it affects your sense of self. Understanding that from an older person’s perspective is crucially important. Care and support can enhance dignity or it can worsen the loss of it if not given in the right way.  Good support is essential in terms of how people make the adjustments they need to make.”

Dr Lloyd highlights that the relationship between dignity, identity and independence is complex. “Loss of independence involves a change in your identity and is a challenge to your dignity,” she states. “It is through the support of others that individuals are able to rebuild their sense of identity in their changed circumstances.”

Support and care need to be responsive to what people are going through and to see things from the perspective of the person on the receiving end of care. “Older people are going through enormous changes and the people who are helping them need to be aware of these.”
Source: Economic and Social Research Council