Major depression and allergy: does neuroticism explain the relationship?

Area of Science:

• Psychiatry and Immunology
• Epidemiology

Background:

• Previous research suggests a link between mental health conditions and allergic diseases.
• The role of neuroticism in the depression-allergy relationship requires further investigation.

Purpose of the Study:

• To examine the association between major depression, neuroticism, and self-reported allergy in a community-based adult sample.
• To explore potential gender differences in these associations.

Main Methods:

• Utilized data from the Midlife Development in the United States Survey, a nationally representative sample of 3,032 adults (ages 25-74).
• Employed Analysis of Variance (ANOVA) and multiple logistic regression analyses.
• Investigated the influence of neuroticism and gender on the depression-allergy link.

Main Results:

• Major depression was associated with a 1.5-fold increased likelihood of allergy (OR, 1.5; 95% CI, 1.14-1.98).
• Higher neuroticism levels correlated with a 1.22-fold increased allergy likelihood (OR, 1.22; 95% CI, 1.04-1.43).
• In women, depression significantly increased allergy risk (OR, 1.67; 95% CI, 1.15-2.41), independent of neuroticism. In men, only neuroticism showed a significant association with allergy (OR, 1.42; 95% CI, 1.42-1.82).

Conclusions:

• The association between major depression and allergy is confirmed, particularly in women, and appears independent of neuroticism in this group.
• Neuroticism is linked to allergy in men, irrespective of depression status.
• Further prospective, longitudinal research is warranted to elucidate the biological mechanisms underlying these observed associations.