How growing up in East Germany affected cognitive health in later life

Older adults who lived in socialist East Germany before the 1989 reunification show better cognitive health and slower mental decline today than their West German peers. This unexpected advantage seems linked to the former East German educational system, which featured longer compulsory schooling and widespread early childcare. The findings were recently published in the journal Research on Aging.

Following World War II, Germany was split into two distinct nations with opposing political and economic models. The German Democratic Republic in the East operated as a socialist state with a planned economy. The Federal Republic of Germany in the West developed as a capitalist, liberal democracy.

When the countries reunited in 1989, citizens merged into a single legal and economic system. This unique history provides researchers with a natural experiment to study how entirely different societal structures affect human development over a lifetime.

The contrast between East and West Germany represents a rare situation where culturally similar populations were separated by completely different modes of governance. The East German welfare state prioritized collective investments, aiming to build a highly productive workforce through extensive health and education services.

Previous research has consistently shown that East Germans suffered worse physical health and lower life expectancies compared to West Germans. These physical disparities are largely attributed to differences in health behaviors, economic development, and cardiovascular health.

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Sociologist Ariane Bertogg at the University of Konstanz and gerontologist Jeffrey E. Stokes at the University of Massachusetts Boston wanted to see if these political systems left a similar footprint on the aging brain. They tested two competing ideas about cognitive aging.

One theory suggested West Germans would perform better on cognitive tests in later life because they enjoyed stronger economic growth, better nutrition, and more civil liberties. Another theory proposed that East Germans might have an advantage due to their state funded educational system.

East Germany mandated ten years of compulsory schooling, compared to eight or nine years in West Germany. The East also provided universal early childcare and a less socially divided school structure.

Educational exposure early in life is a primary driver of cognitive reserve. Cognitive reserve is the brain’s ability to build dense neural connections, which helps it compensate for age related damage and delay the onset of memory loss.

To find out which societal effect dominated, Bertogg and Stokes analyzed information from the Survey of Health, Ageing and Retirement in Europe. They looked at a large sample of 5,231 older adults who lived in either East or West Germany in 1989.

Participants were at least 50 years old during the study and were interviewed multiple times over an average of four years. The survey included four standard tests used to evaluate brain health and predict dementia.

Working memory was tested by asking participants to recall a list of ten words. Executive function, which involves planning and focusing attention, was measured by having people name as many animals as they could in a set time.

Orientation was scored based on whether participants correctly knew the current date and day of the week. Finally, numeracy was tested by having participants repeatedly subtract the number seven from one hundred.

The researchers used statistical models to map each person’s cognitive trajectory over time. They adjusted the results for factors like childhood health, household income, and overall educational attainment.

To account for early life conditions, the researchers utilized a special retrospective module of the survey. Participants provided detailed histories regarding their childhood health, their perceived math and language skills relative to peers, and the number of books in their childhood homes.

The data revealed that individuals who lived in East Germany before reunification performed better across all four cognitive tests. They also showed a slower rate of cognitive decline as they aged.

West German residents experienced a steady decline in immediate memory and verbal fluency over the course of the study. In contrast, East German residents maintained stable scores or even slightly improved in these areas.

East Germans also demonstrated less steep declines in their orientation and numerical abilities. The researchers noted that these advantages were especially pronounced in men.

The results present an unusual paradox in aging research. Usually, populations with poorer physical health and lower life expectancies also suffer from worse cognitive aging.

Despite East Germans having higher rates of cardiovascular disease and earlier mortality on average, their aging brains remained more resilient. This suggests that the early benefits of an egalitarian, intensive education system can offset some of the physical wear and tear associated with a lower standard of living.

Next, Bertogg and Stokes examined whether a person’s age at the time of reunification influenced their cognitive outcomes. They wanted to know if experiencing the transition during a specific life stage altered the trajectory of mental aging.

They found that the gap in memory and verbal fluency was widest between East and West Germans who were in their forties when the Berlin Wall fell. West Germans in this age group showed relative disadvantages compared to their Eastern counterparts.

For numeracy and orientation, the East German advantage was highest among those who experienced reunification in their twenties. The cognitive differences between the two populations were largely absent among people who were already nearing retirement age in 1989.

The researchers interpret this as evidence of critical periods in adult development. Entering the workforce during reunification may have helped young East Germans maximize the benefits of their schooling within the new, larger economy.

Conversely, West Germans navigating reunification in their forties may have faced intense economic competition and family stress. Mid adulthood is often a period of high financial responsibility, making individuals more vulnerable to the mental health impacts of economic shifts.

The two nations differed in many ways beyond education and economics. West Germans faced higher exposure to environmental toxins like lead from gasoline, simply because car ownership was much higher there.

Social and psychological experiences also varied wildly depending on the side of the border. West Germany fostered a more open civil society, while East Germany relied on secret police and informants, which negatively impacted social trust.

The dataset did not allow the researchers to measure the direct impact of these specific social and environmental stressors on brain health. Future investigations will need to look at similar differences across other post socialist and capitalist European countries to see if the pattern holds.

Future studies will also need to track clinical diagnoses of Alzheimer’s disease and other dementias, rather than just test scores. High performing individuals sometimes hit the maximum possible score on cognitive tests, which can mask early signs of decline.

Cognitive test performance does not capture the full reality of living with a neurodegenerative disease. Tracking actual medical records over time will clarify how these early life educational advantages translate into real world dementia prevention.

The study, “Is There a Cognitive Footprint of Political Systems? The Case of Separation and Reunification of East and West Germany and Its Association With Later Life Cognitive Health,” was authored by Ariane Bertogg and Jeffrey E. Stokes.