An international genetics study highlights the link between personality traits and health outcomes. The study, conducted by the Revived Genomics of Personality Consortium, found more than 1,200 genetic variants associated with the ‘Big Five’ personality traits: openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism. These genetic patterns showed ties to various life outcomes, including health, longevity, education, career paths, and income.
Researchers pooled data from 46 research cohorts globally. Participants provided DNA samples and completed personality trait questionnaires. Despite not identifying any single gene responsible for personality, the study uncovered hundreds of genetic variants contributing to behavior, thoughts, and feelings. Ted Schwaba, the lead author, emphasized the absence of a ‘personality gene’ but noted the collective impact of multiple genetic variants on personality could be significant.
Connection Between Personality and Hospitalization
A notable study finding linked neuroticism-related genetic variants to increased hospital time. Neuroticism, characterized by negative emotions like anxiety and sadness, could contribute to longer hospital stays.
T. Ayodele Ajayi, a consultant psychiatrist interviewed by Newsweek, explained why neuroticism might lead to extended hospitalization. Patients with higher neuroticism levels may have complicated conditions requiring more assessment and treatment. Their heightened sensitivity to stress and emotional distress might hinder adjusting to diagnoses or coping with treatment.
Ajayi mentioned behaviors common in neurotic individuals, like smoking or excessive alcohol consumption, could escalate service use or interfere with recovery. He stressed the study’s findings show association, not causation, and called for more investigation. There is a need to clarify if the longer hospital stays result from physical, mental, or combined health conditions.
Interplay Between Personality, Genetics, and Environment
The study highlighted overlaps among genetic patterns related to personality traits, mental and physical health, education, and career outcomes. For instance, conscientiousness-related genetic variants correlated with daytime activity, while openness to experience and extraversion were linked to night owl tendencies.
Researchers demonstrated that personality, genetics, and environment interact rather than function separately. Genetic variants associated with openness linked to moving to cosmopolitan neighborhoods, suggesting such environments might shape personality traits.
Schwaba added that genetic variants tied to openness correlated with income and job changes, relevant to vocational studies.
Genetics’ Limited Role
Despite identifying genetic variants affecting personality traits, their individual impact is small, but their combined effect is significant and consistent across populations. For example, extraversion-related genetic variants in a young adult in the Netherlands could predict extraversion in a retired adult in the United States.
Genetics alone doesn’t explain everything; environmental factors play a crucial role in shaping personality. The study suggests integrating personality traits into research across medicine, health, education, and the workplace.
Overall, understanding the genetic basis of personality could influence studies beyond psychology, potentially affecting medicine, health, education, and employment fields.