Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Early identification of dementia increasingly difficult

15.05.2009
If grandma seems to forget things, will she end up demented? These days, memory loss is one of the very few symptoms that may signal which 70-year-olds risk developing dementia. This is shown in a doctoral thesis at the Sahlgrenska Academy at the University of Gothenburg, Sweden.

Several of the tests previously used to predict which elderly individuals risk developing dementia do not seem to work any longer. The thesis shows that memory loss is the only factor that can still be used to indicate who is at risk, although not among the very old.

The study compared nondemented 70-year-olds examined in the early 1970s with nondemented 70-year-olds examined in the year 2000. The results show that those who were examined in 2000 scored much higher on psychological tests than those examined 30 years earlier. This finding clearly indicates that such tests can no longer be used to predict future dementia.

- In the early 1970s, several different tests could be used to predict people's risks of developing dementia, but today it seems like psychiatric evaluation of the memory is the only useful test. In addition, it is more difficult to predict dementia the higher the person's level of education, says physician PhD Simona Sacuiu, the author of the thesis.

The follow-up of the 70-year-olds five years later showed that 5% had developed dementia. Those with memory problems showed an increased risk of developing dementia, although not everybody with poor memory developed dementia. Consequently, the link between forgetfulness and future dementia is more complex than commonly thought. Memory loss among elderly individuals may, but doesn't have to be, an early sign.

- In order to effectively detect dementia at an early stage, we need a useful tool that includes several types of tests, but the tests need continuous adjustments since the elderly of today perform much better at standardised psychological tests than previous generations, says PhD Sacuiu.

Examinations of a group of nondemented 85-year-olds show that the link between memory problems and dementia is not as clear in this age group. The 85-year-olds' ability to find words, to copy a geometric figure and to take quick decisions were some qualities that were evaluated in a psychiatric assessment. More than 300 individuals participated in the study, of which 17% had developed dementia three years later.

- We can't say that memory loss is the only meaningful sign of future dementia among 85-year-olds, since other symptoms, such as difficulties finding words or drawing a geometric figure, were needed for their risk of developing dementia to increase, says Sacuiu.

The H70 study
H70, short for Health 70, is a unique population study at the Sahlgrenska Academy. The study was started in 1971 with an assessment of 70-year-olds. The individuals were followed up regularly for 30 years. A new H70 study was started in the year 2000. Its participants will be followed up again during 2009 at age 79. The study includes data on over 2000 residents of Gothenburg, Sweden. The participants have been examined both physically and mentally, and have made it possible for several research teams to pinpoint various trends in physical and mental health in the ageing population.

Helena Aaberg | idw
Further information:
http://hdl.handle.net/2077/19395
http://www.gu.se/

More articles from Studies and Analyses:

nachricht New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)

nachricht Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Strathclyde-led research develops world's highest gain high-power laser amplifier

The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.

The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

New insights into the ancestors of all complex life

29.05.2017 | Earth Sciences

New photocatalyst speeds up the conversion of carbon dioxide into chemical resources

29.05.2017 | Life Sciences

NASA's SDO sees partial eclipse in space

29.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>