Belief in a just world, health-related quality of life, and mental health among Chinese patients with chronic obstructive pulmonary disease.

Abstract

Personal belief in a just world (PBJW) has been demonstrated to protect mental health. However, whether general belief in a just world (GBJW) serves adaptive functions for mental health across different groups and cultures remains unclear. This study explored the effects of PBJW and GBJW on mental health and moderating effects of PBJW and GBJW on the relation between health-related quality of life and mental health among patients with chronic obstructive pulmonary disease (COPD) in China. A total of 147 patients with COPD (90.5% male; mean age = 64.44years) completed measures of health-related quality of life, depression, anxiety, PBJW, and GBJW and provided pulmonary function data. Younger age and female sex were related to higher depression; female sex, living with others, and high financial burden were associated with higher anxiety. Worse health-related quality of life and lower PBJW were associated with higher depression and anxiety. An interaction between health-related quality of life and BJW was revealed. For patients with low PBJW, lower health-related quality of life was correlated with higher depression. For patients with stronger endorsement of GBJW, worse health-related quality of life was associated with higher depression and anxiety, but the variance of anxiety caused by interaction was insignificant. The findings suggest that for patients with COPD experiencing health deterioration, holding strong PBJW but weak GBJW may be beneficial for mental health. Our study advances our understanding of the different functions of PBJW and GBJW in mental health across different groups and cultures.