A study of elderly residents in Sardinia’s Blue Zone — a region famous for its high proportion of people living past 90 — has found that certain personality traits are associated with healthier aging. Researchers from the University of Cagliari compared 125 people aged 71 to 101 from the Blue Zone and a neighboring rural area, finding that openness to experience, conscientiousness, and agreeableness correlated with higher psychological well-being and more active lifestyles in old age. However, the study is observational, and the authors themselves caution that it does not prove cause and effect.
What you need to know
- The study, published in the International Journal of Applied Positive Psychology, compared 125 Sardinians aged 71–101 from a Blue Zone and a non–Blue Zone rural area, adjusting for age and education.
- Blue Zone residents scored higher on openness to new experience, spent an average of 11.3 hours per week on mentally and physically stimulating leisure (vs. 6.8 hours for their neighbors), and showed stronger emotional competence and stress-coping skills.
- Higher neuroticism was the only Big Five trait consistently linked to lower self-rated quality of life.
- The researchers acknowledge this is an observational study: it cannot determine whether positive traits cause better health or whether better health fosters positive traits.
What are Blue Zones and why Sardinia matters
Blue Zones are regions where an unusually large share of the population reaches advanced old age while remaining in good health. Sardinia earned its place on the list because of its persistently high proportion of residents aged 90 and above — a pattern that has held steady for roughly 150 years. Other recognized Blue Zones include Okinawa (Japan), the island of Ikaria (Greece), and the Nicoya Peninsula (Costa Rica). Scientists have long investigated what gives these populations an edge: genetics, diet, climate, lifestyle, or some combination.
Scientists have identified which personality traits are linked to longevity
How the study was conducted
The research, published in the International Journal of Applied Positive Psychology, compared Sardinian “super-agers” from the Blue Zone with elderly people from a nearby rural area that does not qualify as a Blue Zone. The 125 participants, with a mean age of 80.1 years, completed a battery of questionnaires. Results were adjusted for age and education level.
Personality was assessed using the Big Five model — five broad dimensions of personality: openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism (the tendency toward anxiety and negative emotions). While real personality is more complex than five scales, this framework is widely used in psychology to explore links between personality and health outcomes.
Which traits were associated with healthier aging
Long-lived individuals more often engage in mentally stimulating activities
The central finding: openness to experience, conscientiousness, and agreeableness were associated with higher psychological well-being and with greater engagement in diverse activities during old age. Higher neuroticism, meanwhile, was linked to lower self-rated quality of life.
Blue Zone residents showed these patterns more prominently. They scored higher on openness to new experiences, demonstrated more effective stress-coping strategies, displayed stronger emotional competence, and more frequently engaged in activities that challenged both mind and body. The researchers also noted greater curiosity and receptiveness to new ideas among the Blue Zone group, along with a better ability to understand and express their emotions.
Why Blue Zone Sardinians stay active longer
The researchers describe the Blue Zone residents’ lifestyle as simple but highly active, with a significant portion of their activities involving mental stimulation. The numbers bear this out: Blue Zone participants spent an average of 11.3 hours per week on stimulating leisure — both mental and physical — compared with 6.8 hours for their neighbors from the non–Blue Zone area.
According to the authors, the mechanism likely involves a combination: adaptive personality traits and effective stress-coping skills encourage a more active lifestyle, and that activity in turn helps preserve health and independence in later years.
The combination of adaptive personality traits and coping resources promotes a more active lifestyle, which in turn contributes to healthier aging.
Important limitations: what the study does and does not prove
This is an observational study, not proof of cause and effect. The authors themselves acknowledge that their data did not confirm all of their hypotheses. Contrary to expectations, there was almost no consistent link between health-related quality of life and Big Five traits — with the exception of neuroticism.
The researchers suggest that in later years, perception of one’s own physical health may depend more on the objective state of the body and on social support than on stable personality traits.
Those with higher neuroticism did consistently rate their quality of life lower, but this raises a classic chicken-and-egg problem: does a positive outlook improve health, or does good health foster a positive outlook? The study cannot answer that question.
Still, the practical takeaway is worth noting: curiosity, openness to new experiences, effective stress management, and an active leisure life are all associated with healthier aging — even if science has not yet fully untangled cause from effect. Maintaining an interest in life is unlikely to do any harm.
