Clin Nutr Res.  2017 Apr;6(2):89-98. 10.7762/cnr.2017.6.2.89.

Depression Is a Mediator for the Relationship between Physical Symptom and Psychological Well-being in Obese People

Affiliations
  • 1Human Life Research Center, Dong-A University, Busan 49315, Korea. oykim@dau.ac.kr hjeon@dau.ac.kr
  • 2Department of Food Science and Nutrition, Dong-A University, Busan 49315, Korea.
  • 3Department of Child Studies, Dong-A University, Busan 49315, Korea.

Abstract

This present study aimed to investigate the association effect of obesity status, physical symptom, insecure attachment, and depression on psychological well-being in non-diabetic healthy Koreans. Height, weight, waist circumference, blood pressure, and socio-psychological questionnaires (insecure attachment, depression, and physical symptom psychological well-being, etc.) were examined in 123 healthy Koreans. Student t-test, correlation analysis, and mediation analysis were performed. Study subjects were divided into 2 groups based on body mass index (BMI, kg/m²): obesity (BMI ≥ 25, n = 36) and non-obesity (BMI < 25, n = 87). Obese people were older and showed higher proportion of males than non-obese ones. Regarding the values of socio-psychological test, obesity group showed lower insecure attachment, and higher physical symptom than non-obesity group. In correlation and mediation analyses, depression was positively related to insecure attachment and physical symptom in both BMI groups. Positive relationship between physical symptom and insecure attachment was observed only in non-obesity group, but not in obesity group. The effect of insecure attachment on psychological well-being was completely mediated by depression in both BMI groups. On the other hand, the effect of physical symptom on psychological well-being was completely mediated by depression in obesity group, but not in non-obesity group. In conclusion, this study presented that the effects of physical symptom and insecure attachment on psychological well-being were completely mediated by depression in obese healthy Koreans, but not in non-obese ones. It will provide useful data for extending the knowledge on the relationship between the physical health and mental health.

Keyword

Obesity; Depression; Insecure attachment; Physical symptom; Psychological well-being

MeSH Terms

Blood Pressure
Body Mass Index
Depression*
Hand
Humans
Male
Mental Health
Negotiating
Obesity
Waist Circumference

Figure

  • Figure 1 Relationships among psychological parameters according to obesity status. Tested by Pearson correlation analysis; circle sizes are in proportion to the correlation coefficient values; red color indicates negative correlation and blue color indicates positive relationship between the 2 values. The HE, FF, and FSR are the subs of PWB. IA, insecure attachment; PS, physical symptom; DP, depression; PWB, psychological well-being; HE, hedonic enjoyment; FF, feeling of flow; FSR, feeling of self-realization.

  • Figure 2 Model fit. IA, insecure attachment; PS, physical symptom; DP, depression; PWB, psychological well-being; HE, hedonic enjoyment; FF, feeling of flow; FSR, feeling of self-realization; FSC, feeling of self-confidence.

  • Figure 3 Multi-path pattern of the association among physical symptom, insecure attachment and depression on psychological well-being according to the BMI groups. (A) Pattern for non-obesity group (BMI < 25 kg/m2), (B) Pattern for obesity group (BMI ≥ 25 kg/m2); the number indicates standardized β value. The model was adjusted for age and sex. Solid line indicates significant relationship between the 2 parameters. Dotted line indicates no significant relationship between the 2 parameters. BMI, body mass index; IA, insecure attachment; PS, physical symptom; DP, depression; PWB, psychological well-being; HE, hedonic enjoyment; FF, feeling of flow; FSR, feeling of self-realization; FSC, feeling of self-confidence.


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