Study Links Personality Traits to Longevity and Mortality Risk

A significant study conducted by the University of Limerick has uncovered a strong correlation between personality traits and the risk of death. By analysing nearly six million person-years of data from a diverse range of longitudinal studies across four continents, researchers revealed that personality is likely tied to longevity through its impact on various health behaviours and biological processes. The findings were published in the esteemed Journal of Personality and Social Psychology.

The research evaluated five key personality traits—neuroticism, extraversion, openness, agreeableness, and conscientiousness—using data from 569,859 individuals, which accounted for 5,997,667 person-years and 43,851 deaths. Among the notable discoveries, higher levels of neuroticism, characterized by anxiety and emotional instability, were associated with an increased risk of earlier death. Conversely, higher conscientiousness—marked by organization and self-discipline—was linked to a lowered mortality risk.

The impact of extraversion, defined by a preference for social engagement, also emerged as a significant factor in reducing death risk. Interestingly, the study found age to be an essential element in the relationship between neuroticism and mortality, with younger individuals displaying stronger correlations. The association between extraversion and reduced death risk was particularly pronounced in the United States and Australia, raising questions about varying health outcomes related to personality traits across different cultures.

Most studies included in the review indicated weak or negligible associations between openness and agreeableness and health outcomes. Dr. Máire McGeehan, an assistant professor in UL’s Department of Psychology and a doctoral scholar funded by the Irish Research Council, led the research. She emphasized the study’s significance: “This review brings together decades of longitudinal research and clearly highlights the critical role that personality plays in longevity. Our work shows that how we think, feel and behave is not only linked to life satisfaction and social relationships, but also to how long we live.”

Dr. McGeehan further noted that the effects of personality on health and longevity are comparable in scale to traditional public health determinants such as socio-economic status. Senior author Dr. Páraic S Ó ’Súilleabháin, an associate professor in UL’s Department of Psychology, termed the findings “groundbreaking,” suggesting they will inspire extensive future research on how personality influences lifespan.

“This study builds on other research from our group indicating that personality is critically important to health across the lifespan,” Dr. Ó ’Súilleabháin stated. The research collaboration also involved teams from Florida State University, West Virginia University, and Northwestern University, showcasing a collective effort in examining the intricate links between personality and health outcomes.

As the implications of this research unfold, it underscores the necessity of understanding personality as a vital component in promoting longevity and improving health behaviours globally. The results advocate for further exploration into how personality traits can be leveraged to enhance individual health outcomes and overall well-being.