Does recurrent depression lead to a change in neuroticism?

Area of Science:

• Psychiatry
• Clinical Psychology
• Personality Psychology

Background:

• Recurrent or chronic depressive illness is a significant public health concern.
• Long-term personality changes, specifically in neuroticism, following depressive episodes remain incompletely understood.
• Previous research suggests potential links between persistent mental health conditions and personality alterations.

Purpose of the Study:

• To test the hypothesis that recurrent or chronic depressive illness leads to enduring changes in neuroticism.
• To examine if the severity or chronicity of depression influences long-term neuroticism levels.
• To assess neuroticism changes over an 18-year period in a cohort of formerly depressed patients.

Main Methods:

• A longitudinal study design was employed with a sample of 34 patients diagnosed with depression.
• The Eysenck Personality Inventory (EPI) was used to measure neuroticism at three time points: during acute illness, upon recovery, and 18 years later.
• Patients were categorized into good and poor outcome groups based on global ratings, episode frequency, hospitalization, and chronicity.

Main Results:

• The overall mean neuroticism score for the entire sample did not show a significant change across the 18-year follow-up period.
• No significant differences in the change of neuroticism scores were found between patients classified as having good versus poor outcomes.
• The hypothesis that depressive illness causes long-term changes in neuroticism was not supported by the data.

Conclusions:

• Recurrent or chronic depressive illness does not appear to induce lasting alterations in neuroticism levels.
• Neuroticism scores remain relatively stable over an 18-year period, irrespective of the course or outcome of depressive illness.
• These findings suggest that neuroticism may be a stable trait, not significantly modified by the experience of chronic or recurrent depression.