Early Retirement May Increase Cognitive Decline Risk, Study Suggests
Quitting work in one's 50s could nearly double the likelihood of cognitive impairment for women and increase it by 50% for men, according to new research.
Retiring in one's 50s may significantly elevate the risk of cognitive decline later in life, a recent study indicates. Researchers in New York tracked 2,400 Americans for 16 years, analyzing their employment histories and cognitive functions. The findings suggest that continuing to work may be a protective factor for brain health.
The study, published in the journal Alzheimer's & Dementia, found that women who retired early were nearly twice as likely to be diagnosed with mild cognitive impairment or dementia compared to those who continued working. For men, early retirees faced a 50% higher risk of these conditions.
Early retirement in the U.S. is generally defined as retiring before age 65. Current estimates show American men typically retire at 65, while women retire at 63.
While the exact mechanisms are still being explored, experts hypothesize that stable employment might preserve cognitive health by continuously exercising the brain. This cognitive stimulation can enhance neuroplasticity, the brain's capacity to adapt and form new neural connections. Tasks such as problem-solving, multitasking, and decision-making inherent in most jobs are believed to contribute to this.
"Importantly, exposure to long-term employment instability differs systematically by gender in exposure, and likely in its impact on cognitive health," said Dr. Erika Beidelman, the study's lead author and a postdoctoral research scientist at the Butler Columbia Aging Center. "These differences underscore the necessity of examining gender-specific employment trajectories to understand late-life cognitive outcomes."
The observational study, which analyzed data from the Health and Retirement Study, involved 2,418 adults who were around 57 years old at recruitment, with 61% being women. Participants' employment histories were examined from 1998 to 2014, with cognitive tests conducted in 2016. Participants were categorized into groups based on their employment status over the study period, including employed-job secure, employed-job insecure, unemployed, retired, not in labor force, self-employed, and unreported.
Overall, 30% of women and 31% of men met the criteria for cognitive impairment. The research revealed that for women, all employment groups except those experiencing consistent job insecurity were linked to lower memory and executive function scores compared to those in secure employment. Among men, all groups except the predominantly self-employed showed a higher likelihood of cognitive impairment compared to those in secure employment.
Interestingly, the study noted that individuals who remained employed long-term despite reporting job insecurity did not exhibit the same pattern of lower cognitive scores as those who left the workforce. This suggests that employment continuity, rather than perceived job security alone, may be a more critical factor in cognitive aging.
Researchers suggest that steady employment can also boost social engagement and reduce stress associated with job security worries, both of which can contribute to cognitive health and potentially lower the risk of harmful brain inflammation.
"Our findings carry meaningful implications for dementia prevention and public health policy," Beidelman stated. "Employment continuity across midlife may represent a modifiable factor associated with cognition decades later. Policies supporting sustained labor force attachment, reducing involuntary job transitions, and expanding access to cognitively engaging employment throughout midlife may help promote healthier cognitive aging."