Abstract
Objectives: This study aims to explore the associations of personality traits and extra-family social relationship with depressive symptoms among Chinese adults. Methods: A nationally representative sample of 29,810 adults aged 16 and above were selected from 2018 CFPS. Personality and depressive symptoms were measured using CBF-PI-15 and the CES-D8 scale. Extra-family social relationship was assessed through the self-rated evaluation. The multiple regression analysis and the PROCESS macro were used for the mediation analysis. Results: Extraversion (OR = 0.807, 95% CI = 0.773, 0.842), agreeableness (OR = 0.795, 95% CI = 0.756, 0.835) and extra-family social relationship (OR = 0.927, 95% CI = 0.913, 0.941) had negative associations with depressive symptoms. Extra-family social relationship could mediate between extraversion and depressive symptoms (Indirect effect = -0.049,95% CI = -0.060, -0.039) as well as agreeableness (Indirect effect = -0.056, 95% CI = -0.068, -0.046) and depressive symptoms. Comparing to females, the indirect effect accounts for a higher proportion of total effect in males. Conclusion: Extra-family social relationship might mediate the association between extraversion and depressive symptoms as well as agreeableness and depressive symptoms.