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May 5

By Janice Wood

People whose jobs require more speaking, developing strategies, conflict resolution, and managerial tasks may experience better protection against memory and thinking decline in old age than their co-workers, according to a new study.

“Our study is important because it suggests that the type of work you do throughout your career may have even more significance on your brain health than your education does,” said study author Francisca S. Then, Ph.D., of the University of Leipzig in Germany. “Education is a well-known factor that influences dementia risk.”

For the study, 1,054 people over the age of 75 were given tests that measured their memory and thinking abilities every one and a half years for eight years.

The researchers also asked the study participants about their work history, then categorized the tasks they completed into three groups: executive, verbal, and fluid.

Examples of executive tasks are scheduling work and activities, developing strategies and resolving conflicts. Examples of verbal tasks are evaluating and interpreting information, while fluid tasks were considered to be those that included selective attention and analyzing data, the researchers explained.

Memory and thinking abilities were examined through a clinical test, the Mini-Mental State Examination (MMSE). In this test, a small decline in points can indicate a clinically relevant deficit, according to the researchers.

The study found that people whose careers included the highest level of all three types of tasks scored highest on the thinking and memory tests by two MMSE points over people with the lowest level.

People with the highest level of all three types of tasks also had the slowest rate of cognitive decline, according to the study’s findings.

Over eight years, their rate of decline was half the rate of the participants with a low level of mentally demanding work tasks. Among the three types of work tasks, high levels of executive and verbal tasks were associated with slower rates of memory and thinking decline, the researchers noted.

Participants with a high level of executive tasks scored two MMSE points higher on memory and thinking tests at the beginning of the study and five MMSE points higher after eight years in the study compared to participants with a low level of these tasks, according to the study’s findings. Participants with a high level of verbal tasks declined an average two MMSE points less than those with a low level, the study found.

“Challenges at work may indeed be a positive element, if they build up a person’s mental reserve in the long-term,” said Then.

The study was published in Neurology, the medical journal of the American Academy of Neurology.

Source: The American Academy of Neurology

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