B-31 Free Communication/Poster - Epidemiology of Physical Activity and Health in Adults Wednesday, June 1, 2016, 1: 00 PM - 6: 00 PM Room: Exhibit Hall A/B
Depression influences a worker’s productivity and mental health substantially. Lifestyle factors such as sedentary behavior, physical inactivity, poor fitness, and vitamin D deficiency are positively associated with symptoms of depression. On the other hand, regular exercise can improve mood in people with mild to moderate depression. However, little is known regarding the relationships between depression and the modifiable risk factors in office workers, especially in Korea.
PURPOSE: To investigate the association between depression and the modifiable lifestyle risk factors in a sample of Korean office workers.
METHODS: In a cross-sectional design, a total of 492 office workers aged 30 to 60 years (321 men and 171 women) completed assessments of body composition, physical fitness (i.e., strength, flexibility, and endurance), and serum vitamin D levels. A standardized Korean version of Beck Depression Inventory (BDI) was used to assess the existence and severity of symptoms of depression (The Korean Journal of Counseling and Psychotherapy 2005; 4: 855-876). Based in BDI scores, subjects were classified as normal (NO) with BDI score of <9, mildly depressed (ML) with BDI score of 10-15), and moderately depressed (MO) group with BDI score 16–23.
RESULTS: The Kruskal-Wallis tests for linear trends showed significant decreases in body weight (p=.032), lean body mass (p=.001), serum vitamin D (p<.001), upper strength (p<.001), and endurance across the incremental severity of depression symptoms from NO to MO. In addition, a significant linear increase in sitting time (p<.001) was found across the incremental severity of depression symptoms. Linear regression analyses showed that serum vitamin D (beta= -.331, SE=.031, p<.001) and sitting time (beta= .117, SE=.001, p=.010) were independent predictors for the severity of depression symptoms even after adjustment for age and sex.
CONCLUSION: The current findings of the study showed that low lean body mass, poor physical fitness, sedentary behavior, and low serum vitamin D levels were independent risk factors of depression, implying a need of a healthy lifestyle promotion along with vitamin D supplementation for sedentary office workers.
The National Research Foundation Grant funded by the Korean Government (NRF-2012R1A1A2006180) supported this work.