Korean J Adult Nurs.  2019 Dec;31(6):691-700. 10.7475/kjan.2019.31.6.691.

Mediating Effect of Physical Activity in the Relationship between Depressive Symptoms and Health-related Quality of Life in Patients with Coronary Artery Disease: The 2016 Nationwide Community Health Survey in Korea

• Won MH

• KMID: 2466234
• DOI: http://doi.org/10.7475/kjan.2019.31.6.691

Abstract

PURPOSE
This study aimed to examine the mediating role of physical activity in the relationship between depressive symptoms and health-related quality of life in patients with coronary artery disease.
METHODS
A descriptive cross-sectional study design was conducted using the data from the 2016 Korea Community Health Survey. The participants comprised 6,072 patients with coronary artery disease aged 19 years or older. Depressive symptoms, physical activity, and health-related quality of life were assessed. The collected data were analyzed by a complex sample test using SPSS/WIN 24.0 program. Bootstrapping methodology was utilized to examine the mediating role of physical activity in the relationship between depressive symptoms and health-related quality of life with SPSS PROCESS macro Model 4.
RESULTS
The results of the hierarchical linear regression analysis showed that depressive symptoms (t=−22.37, p<.001) and physical activity (t=12.12, p<.001) were significant predictor of health-related quality of life. A mediation analysis further revealed that physical activity mediates the relationship between depressive symptoms and health-related quality of life.
CONCLUSION
This study suggests that the negative impact of depressive symptoms on health-related quality of life can be improved through physical activity. Healthcare providers should consider these finding during early assessment of depressive symptoms in patients with coronary artery disease. Moreover, developing intervention strategies to enhance the level of physical activity could improve health-related quality of life of patients.

MeSH Terms

Coronary Artery Disease*
Coronary Vessels*
Cross-Sectional Studies
Depression*
Health Personnel
Health Surveys*
Humans
Korea*
Linear Models
Motor Activity*
Negotiating*
Quality of Life*

Figure

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  Figure 1 Mediating effect of physical activity on the relationship between the depressive symptoms and health-related quality.

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