• Anxiety and mood
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• v.3 no.1
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• pp.26-31
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• 2007

Object : This study was designed to assess the change of heart rate variability (HRV) during stimulation test among the patients with major depressive disorder. Methods : 15 patients with major depressive disorder (MDD) and 15 normal controls were enrolled in this study. We sequentially measured HRV at baseline, during cognitive stimuli and emotional stimuli. Results : There are significant differences between the two groups in HRV index, TINN on baseline state and under cognitive stimulus. Conclusion : Stimulation protocol using HRV can be useful in estimating autonomic nervous function.

• Sleep Medicine and Psychophysiology
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• v.8 no.1
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• pp.30-36
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• 2001

Object: Diurnal variation is included in the diagnostic criteria of the major depressive disorder, melancholic specifier. But there has been controversy over whether diurnal variation is an unique depressive symptoms or a symptom related to a change of sleep patterns, or that of another mechanism, when the previous studies are reviewed. We investigated the existence of diurnal variation according to the subtype of depression and whether diurnal variation is charateristic of melancholic depression or not. We also compared sleep variables according to the existence of diurnal variation. Method: We examined diurnal variation, sleep patterns, severity of depression using the Visual Analogue Mood Scale, Pittsburgh Sleep Quality Index, and Hamilton Depression Rating Scale. Patients recorded their mood state on the Visual Analogue Mood Scale twice a day, morning and evening, for diurnal variation. We divided depressive patients into two groups,-diurnal variation group and nondiurnal variation group,-and compared the mood and sleep variables using SPSS. Results: The frequency of diurnal variation is not significantly different among the subtypes of depression. Significant differences between the diurnal variation group and the nondiurnal variation group existed in middle insomnia and sleep time (p<0.05). In melancholic type, al significant difference between the diurnal variation group and the nondiurnal variation group was noticed in PSQI total, sleep latency, sleep disturbances, daytime dysfunction as well as middle insomnia and sleep time (p<0.05). Conclusions: Diurnal variation existed in other types of depression as well as melancholic type. The results showed that diurnal variation was not a specific symptom of melancholic type, and existence of diurnal variation might be related to sleep patterns.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.933-934
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• 2021

세계보건기구(WHO)에 따르면 전 세계적으로 우울증 장애를 앓고 있는 사람이 3 억 2,200 만명에 달하며, 매년마다 빠르게 늘어나는 환자로 인해 전세계적으로 문제가 되고 있다. 이에 따라 우울증을 감지하기 위한 시스템에 대한 연구가 진행되어지고 있다. 본 논문에서는 우울증 감지에 있어 높은 정확도를 얻을 수 있는 최적의 음성 세그먼트 길이와 멜 밴드의 수를 확인하고자 한다. DAIC-WOZ(Distress Analysis Interview Corpus Wizard of Oz) 데이터셋을 기반으로 2D-CNN(2Dimension - Convolutional Neural Network)를 사용하여 음성 세그먼트 길이와 멜 밴드의 수에 변화를 주며 테스트를 진행하였다. 최종적으로 12 초 길이의 음성 세그먼트와 512 개의 멜 밴드에서 86.3%의 정확도로 최적의 결과를 확인하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.129-136
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• 2019

This study was conducted to identify the health promotion behavior of patients with pulmonary tuberculosis and examine the factors influencing this behavior. The subjects were 152 outpatients who were treated for pulmonary tuberculosis at the national tuberculosis hospital located in M City. Data were collected from July to September, 2016 and analyzed using the t-test, ANOVA, Duncan's test, Pearson's correlation coefficient, and multiple regression analysis. Health promotion behavior was negatively correlated with physical symptoms, perceived barriers, and depression, but positively correlated with self-efficacy. The most powerful variable influencing health promotion behavior was depression and the model showed an explanatory power of 63.5%. The results of this study suggest that it is necessary to employ a variety of strategies to practice and maintain the health promotion behavior of pulmonary tuberculosis patients to decrease their depression and provide psychological support.

• Korean Journal of Psychosomatic Medicine
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• v.10 no.2
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• pp.78-91
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• 2002

Objective : The purpose of this study was to develop the somatization rating scale (SRS), and then to use the scale in clinical pracitice. Methods: First, a preliminary survey was conducted for 109 healthy adults to obtain 40 response items. Second, a preliminary questionnaire was completed by 215 healthy subjects. Third, a comparison was made regarding somatization responses among 242 patients (71 with anxiety disorder. 73 with depressive disorder, 47 with somatoform disorder, and 51 with psychosomatic disorder) and 215 healthy subjects. Results : Factor analysis yielded 5 subscales : cardiorespiratory and nervous responses, somatic sensitivity, gastrointestinal responses, general somatic responses, genitourinary, eye and muscular responses. Reliability was computed by administering the SRS to 62 healthy subjects during a 2-week interval. Test-retest reliability for 5 subscales and the total score was significantly high, ranging between .86-.94. Internal consistency was computed, and Cronbach's ${\alpha}$ for 5 subscales ranged between .72-.92, and .95 for the total score. Convergent validity was computed by correlating the 5 subscales and the total score with the total score of the global assessment of recent stress (GARS) scale, the perceived stress questionnaire (PSQ), and the symptom checklist-90-revised (SCL-90-R). The correlations were all at significant levels. Discriminant validity was computed by comparing the total score and the 5 subscale scores of the patient and control groups. Significant differences were found for 5 subscales and the total score. Only the depressive disorder group was siginificantly higher than control group in all the subscale scores and total scores of SRS among 4 patient groups. In somatic sensitivity, only depressive disorder patients were significantly higher than the normal controls, whereas in general somatic subscale, depressive disorder and somatoform disorder groups were significantly higher than the normal controls. In total scores of the SRS, female subjects were significantly higher than males. Conclusion : These results indicate that the SRS is highly reliable and valid, and that it can be utilized as an effective measure for research in stress- and somatization-related fields. The depressive disorder and somatoform disorder groups showed more widespread somatization than the anxiety and psychosomatic disorder groups.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.8
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• pp.5096-5110
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• 2015

The purpose of this study was to identify the effects of brain wave change through therapeutic recreation programs on depression, sleep disturbance and quality of life among elderly with dementia. The subjects of this quasi-experimental study consisted of two groups, one experimental group (N=14) and one control group (N=18), after excluding 8 participants from a total of 40 participants. The subjects of experimental group were randomly selected from the elderly (order than 65 years old) of senior care center in Daejoen and participated in 3-month therapeutic recreation program. On the other hand, the subjects of control group did not participated in any therapeutic recreation program. Each group's pre-post brain wave change, depression, sleep disturbance and quality of life were estimated. Through ANCOVA and Analysis of Structural Equation Modeling with SPSS window 17.0 and AMOS 7.0, this study found followings. Frist, the therapeutic recreation program group indicated significant improvement of brain waves, sleep disturbance and quality of Life. In addition, depression was significantly reduced in the therapeutic recreation program group. Second, significant causal relationships was found among brain waves, depression, sleep disturbance, and Quality of Life.

• 한국벤처창업학회:학술대회논문집
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• 2018.04a
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• pp.143-147
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• 2018

직무스트레스를 이해하기 위해 많은 선행연구가 있어왔다. 특히 고위험 공무직군의 직무스트레스는 다양한 정신건강에 영향을 미쳐오고 있는 만큼 연구된 내용을 이해할 필요가 있다. 선행연구내용을 경찰관과 소방관을 중심으로 분류하고 적용된 직무스트레스 모델과 척도를 분석하였다. 분석된 논문에서 직무스트레스가 영향을 주고 있는 정신장애를 확인하고, 직무스트레스와 정신장애 간의 영향을 조절할 수 있는 조절변인들을 확인하였다. 직무스트레스 모델과 척도는 JCQ, ERI, NIOSH 모델을 바탕으로, 척도는 KOSS(52%)가 가장 많았다. 또한 직무스트레스가 영향을 주는 요인들로는 직무태도(62%)로 가장 많았으며, 우울(19%)로 나타났다. 직무스트레스를 조절하는 변인으로 직무만족(20%), 사회적지지(19%), 직무특성(15%)로 나타났다. 논의에서는 연구의 한계와 직무스트레스가 영향을 주는 정신장애와 조절변인들을 분석하는 것을 통해서 이후 연구에 나아갈 방향을 제시하였다.

• Korean Journal of Biological Psychiatry
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• v.15 no.2
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• pp.92-100
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• 2008

Objectives : The purpose of this study was to investigate 1) the neuropsychological deficits with major depressive disorder(MDD) in depressed state and 2) the changes of neuropsychological dysfunctions during depressed episodes and remitted periods in the MDD group. Methods : 12 patients with MDD and 70 normal controls who were diagnosed and classified by DSM-IV and SCID-IV interview participated in this study. The psychopathology was measured using the Hamilton rating scale for depression(HAM-D) and Brief Psychiatric Rating Scale(BPRS). The memory function, executive function, and sustained attention were measured by a trained psychologist using the Korean version of Memory Assessment Scale(K-MAS), Wisconsin Card Sorting Test(WCST), and Vigilance(VIG) and Cognitrone (COG) in Vienna Test System. After 6 weeks of treatment, we retested the cognitive tests in order to measure the cognitive functions in remitted states. Results : Patients with MDD achieved significantly lower score in sentence immediately recall, verbal memory score and total memory score of the K-MAS, total errors of the WCST, response time of Vigilance and response time at "Yes" response of Cognitrone than normal controls at baseline. After 6 weeks of medication, the psychiatric symptoms in the patient group were attenuated, and most of the neuropsychological functions including attention, memory, and frontal/executive function were improved except for response time of Cognitrone. Conclusions : This study provides evidence for distinct neuropsychological deficits in patients with MDD on their depressed states and remitted periods. The impairment on response time remains after remission, and this would be a trait marker of major depressive disorder.

• Journal of Korean Society of Forest Science
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• v.85 no.4
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• pp.586-595
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• 1996

The purpose of this study was to examine the effects of participation in a forest program on the level of depression changes in the participants. Total of 501 university students residing in the middle province of Korea were administered Beck Depression Inventory(BDI). Among them, 32 students were selected as participants of the program based on the scores of the BDI. A 5-day forest program included climbing, sharing experience with others and so on. Pre and post tests control group research design was employed for this study, with BDI measures taken from each of 32 participants on three time frames : 2 weeks before the program, immediately before participation, and immediately after participation. BDI scores were expected to decrease as a result of forest program participation. The study results supported this hypothesis.

• Journal of Digital Convergence
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• v.20 no.3
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• pp.517-527
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• 2022

This study aimed to compare changes in cognitive function, depression and ability to perform activity of daily living (ADL) in patients with dementia, mild cognitive impairment (MCI), and ischemic stroke (IS) and to identify factors associated with changes in instrumental ADL. A total of 86 patients (dementia=30, MCI=32, and IS=24) were included to analyse cognitive function, depression, and basic and instrumental ADL obtained at the time of diagnosis and 1 year after baseline. Repeated measures analysis of variance and multiple linear regression were used. A significant group by time interaction was found in executive function (p=.037) and instrumental ADL (p=.023) across groups. The MCI group has little change in executive function and instrumental ADL from the baseline to 1 year after diagnosis while other two groups showed changes with the dementia group showing declines and the group of IS having improvement in these factors over time. Changes in executive function(p=.030) and basic ADL (p<.001) explained 26.9% in the variance of changes in instrumental ADL. These findings showed a different changing pattern in executive function during the first year after diagnosis of dementia, MCI, and IS which have cognitive changes as their main symptoms, probably leading to a different changing pattern in instrumental ADL. Healthcare professionals should routinely assess for executive function and instrumental ADL problems and intervene to maintain and improve these functional outcomes immediately after disease.