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Dive into the research topics where Jee Hyun Ha is active.

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Featured researches published by Jee Hyun Ha.


Cyberpsychology, Behavior, and Social Networking | 2008

Characteristics of Excessive Cellular Phone Use in Korean Adolescents

Jee Hyun Ha; Bumsu Chin; Doo-Heum Park; Seungho Ryu; Jaehak Yu

Abstract The objective of this study was to evaluate the possible psychological problems related to excessive cellular phone use in adolescents. Results from 595 participants showed that the potentially excessive user group had a tendency to identify themselves with their cellular phones and to have difficulties in controlling usage. They expressed more depressive symptoms, higher interpersonal anxiety, and lower self-esteem. A positive correlation was also observed between excessive cellular phone use and Internet addiction.


Psychiatry Investigation | 2012

The Effect of Aging and Severity of Sleep Apnea on Heart Rate Variability Indices in Obstructive Sleep Apnea Syndrome

Man-Kyu Song; Jee Hyun Ha; Seungho Ryu; Jaehak Yu; Doo-Heum Park

Objective This study aims to analyze how much heart rate variability (HRV) indices discriminatively respond to age and severity of sleep apnea in the obstructive sleep apnea syndrome (OSAS). Methods 176 male OSAS patients were classified into four groups according to their age and apnea-hypopnea index (AHI). The HRV indices were compared via analysis of covariance (ANCOVA). In particular, the partial correlation method was performed to identify the most statistically significant HRV indices in the time and frequency domains. Stepwise multiple linear regressions were further executed to examine the effects of age, AHI, body mass index (BMI), systolic blood pressure (SBP), diastolic blood pressure (DBP), and sleep parameters on the significant HRV indices. Results The partial correlation analysis yielded the NN50 count (defined as the number of adjacent R-wave to R-wave intervals differing by more than 50 ms) and low frequency/high frequency (LF/HF) ratio to be two most statistically significant HRV indices in both time and frequency domains. The two indices showed significant differences between the groups. The NN50 count was affected by age (p<0.001) and DBP (p=0.039), while the LF/HF ratio was affected by AHI (p<0.001), the amount of Stage 2 sleep (p=0.005), and age (p=0.021) in the order named in the regression analysis. Conclusion The NN50 count more sensitively responded to age than to AHI, suggesting that the index is mainly associated with an age-related parasympathetic system. On the contrary, the LF/HF ratio responded to AHI more sensitively than to age, suggesting that it is mainly associated with a sympathetic tone likely reflecting the severity of sleep apnea.


International Psychogeriatrics | 2011

Persistence of neuropsychiatric symptoms over six months in mild cognitive impairment in community-dwelling Korean elderly

Seungho Ryu; Jee Hyun Ha; Doo-Heum Park; Jaehak Yu; Gill Livingston

BACKGROUND Several studies of patients with mild cognitive impairment (MCI) have revealed that this population, like people with dementia, have neuropsychiatric symptoms (NPS) as well as memory impairment. No study has reported on the natural history and course of NPS in MCI although this is important in terms of management. We aimed to determine the persistence of NPS over six months in participants with MCI. METHOD The Neuropsychiatric Inventory (NPI) was used to rate the severity of NPS in 241 consecutive referrals with MCI from a Korean clinic at baseline and in 220 patients at 6-month follow-up. We also collected information about the cognition and quality of life of patients and their caregivers. RESULTS Ninety-seven (44.1%) MCI participants who completed the 6-month follow-up exhibited at least one NPS at baseline; 60 (27.3%) were clinically significant NPS. Seventy (72.1%) of those with any symptom had at least one persistent NPS at 6-month follow-up, and 44 (73.3%) of those with clinically significant symptoms had at least one significant and persistent NPS at 6-month follow-up. Those with persistent symptoms had more severe baseline symptoms. Both patients and caregivers had a poorer quality of life when the patient had at least one clinically significant symptom. CONCLUSIONS NPS were highly persistent overall in older people with MCI. Persistence was predicted by having more severe symptoms at baseline. Clinically significant levels of NPS were associated with decreased quality of life. We conclude that clinicians should be aware that NPS symptoms in MCI usually persist.


Nordic Journal of Psychiatry | 2013

Usefulness of Young's Internet Addiction Test for clinical populations

Seog Ju Kim; Doo-Heum Park; Seungho Ryu; Jaehak Yu; Jee Hyun Ha

Abstract Background: Youngs Internet Addiction Test (IAT) is one of the most widely used scales for assessing Internet addiction. Aims: The purpose of the current study was to investigate the value of IAT for subjects clinically diagnosed with Internet addiction. Methods: A total of 52 subjects, whose chief complaint and most serious behavioral problem was Internet addiction, were enrolled at an Internet-addiction clinic associated with a university hospital. The IAT was administered to assess the existence and severity of Internet addiction. Subjects were classified according to the severity guidelines of the Diagnostic and Statistical Manual of Mental Disorders, 4th edition, text revision (DSM-IV-TR) and according to the duration of their Internet addiction. Results: The mean IAT score of our clinical subjects was 62.8 ± 18.2, which was below 70, the cut-off point indicating significant problems. The IAT detected only 42% of the clinical subjects as having significant problems with Internet addiction. No significant differences in IAT scores among those with mild, moderate and severe degrees of Internet addition were found, and no association between IAT scores and duration of illness was observed. Conclusions: IAT scores were not significant correlated with clinical severity and duration of illness in a clinical population. This instrument had limited clinical utility for evaluating the severity of Internet addiction. Considerable caution is required in interpretations of IAT scores.


Psychiatry Investigation | 2011

Onset of Manic Episode during Chemotherapy with 5-Fluorouracil

Jee Hyun Ha; Dae-Yong Hwang; Jaehak Yu; Doo-Heum Park; Seungho Ryu

The authors report a case of 5-Fluorouracil (5-FU) induced manic episode in an elderly female without any previous psychiatric history. The patient presented manic symptoms after 4th cycle of 5-FU chemotherapy after surgery of rectal cancer. After cessation of chemotherapy and administration of olanzapine and divalproex sodium, symptoms were subsided within 10 days.


Psychiatry Investigation | 2015

The Relationship between Type D Personality and Suicidality in Low-Income, Middle-Aged Adults

Dae Hyun Yoon; Seog Ju Kim; Jong-Ha Lee; Pyo-Min Kim; Doo-Heum Park; Seung Ho Ryu; Jaehak Yu; Jee Hyun Ha

Objective Low-income adults are considered to be a group at high risk for suicide. We sought to examine the effect of type D personality and other socio-demographic factors on suicidality in low-income, middle-aged Koreans. Methods In total, 306 low-income, middle-aged Koreans [age: 49.16±5.24 (40-59) years, 156 males, 150 females] were enrolled from the Korean National Basic Livelihood Security System. Socio-demographic data, including employment status, income, health, marital status, and educational attainment, were gathered. Becks 19-item Scale for Suicidal Ideation (SSI) was applied to evaluate suicidality, and the DS14 was used to assess type D personality. Results Unemployment (p<0.01) and absence of spouse (p=0.03) predicted higher SSI scores independent of other socioeconomic factors. All type D personality scores [i.e., negative affectivity (NA), social inhibition (SI), and total score] predicted higher SSI scores independent of all socioeconomic factors (all, p<0.001). Subjects with type D personality had higher SSI scores (p<0.001), and the association between suicidality and socio-demographic factors (employment or physical health) could be found only in subjects without type D personality. Conclusion Type D personality was a risk factor for suicide in low-income Koreans, independently from socio-economic factors. In addition, the socio-demographic factors were less prominently associated with suicidality in those with type D personality.


Clinical Eeg and Neuroscience | 2015

Three-Dimensional Electroencephalographic Changes on Low-Resolution Brain Electromagnetic Tomography (LORETA) During the Sleep Onset Period

Doo-Heum Park; Jee Hyun Ha; Seungho Ryu; Jaehak Yu; Chul-Jin Shin

Electroencephalographic (EEG) patterns during sleep are markedly different from those measured during the waking state, but the process of falling asleep is not fully understood in terms of biochemical and neurophysiological aspects. We sought to investigate EEG changes that occur during the transitional period from wakefulness to sleep in a 3-dimensional manner to gain a better understanding of the physiological meaning of sleep for the brain. We examined EEG 3-dimensionally using LORETA (low-resolution electromagnetic tomography), to localize the brain region associated with changes that occur during the sleep onset period (SOP). Thirty-channel EEG was recorded in 61 healthy subjects. EEG power spectra and intracortical standardized LORETA were compared between 4 types of 30-second states, including the wakeful stage, transition stage, early sleep stage 1, and late sleep stage 1. Sleep onset began with increased delta and theta power and decreased alpha-1 power in the occipital lobe, and increased theta power in the parietal lobe. Thereafter, global reductions of alpha-1 and alpha-2 powers and greater increases of theta power in the occipito-parietal lobe occurred. As sleep became deeper in sleep stage 1, beta-2 and beta-3, powers decreased mainly in the frontal lobe and some regions of the parieto-temporo-limbic area. These findings suggest that sleep onset includes at least 3 steps in a sequential manner, which include an increase in theta waves in the posterior region of the brain, a global decrease in alpha waves, and a decrease in beta waves in the fronto-central area.


Psychoanalysis | 2017

Non-Interpretative Analytic Techniques for Sicker Borderline Patients

Jaehak Yu; Jee Hyun Ha

Borderline personalities are known to be associated with sick and difficult patients in analysis. Sometimes usual interpretation in treating borderline personality patients is of no use due to the lack of acceptable attitude from these patients. Usually, non-interpretative analytic techniques such as containing (understanding of projective identification), holding, mirroring, scaffolding, blending, empathizing, and clarification of patients’ status and affect are used before interpretations. These non-interpretative analytic techniques have been effective in treating sick borderline personality patients, especially when patients were not ready to accept interpretations. Various kinds of non-interpretative analytic techniques were reviewed in this study. Through this process, it was found that the effectiveness of these non-interpretative analytic techniques were not only prerequisites of therapeutic alliance for interpretation, but also independent therapeutic factors for the interaction between patients and analysts in treating sick patients with borderline personality. Psychoanalysis 2017;28(3):51-57


Indian Journal of Psychiatry | 2017

Attitudes toward the mentally ill among community health-related personnel in South Korea

Wook Jung; Eunkyung Choi; Jaehak Yu; Doo-Heum Park; Seungho Ryu; Jee Hyun Ha

Background and Aims: Prejudice and negative attitudes toward mental illness are major obstacles in the rehabilitation and functional recovery of patients. The objective of this study was to evaluate the attitudes of health-related personnel toward mentally ill patients in a local urban community in South Korea. Materials and Methods: In total, 401 participants (men, 132; women, 269; mean age, 37.3 ± 9.5 years) were recruited. The participants were health-related personnel in a district of Seoul, who were recruited from three different workplaces: a local administration office, a public health center, and a community welfare center. Sociodemographic data were gathered, and the community attitudes toward the mentally ill (CAMI) inventory were administered. Comparisons of the CAMI subscales were conducted among participants using statistical analysis. Results: Community welfare center workers showed more authoritarianism and social restriction and less community mental health ideology than the other two groups. Among the demographic variables, a shorter working career, higher education, female gender, and younger age were also related to a more negative attitude toward mentally ill patients. Conclusion: Community health-related personnel who have contact with patients with mental illness should be encouraged to have a fair, hospitable, and open-minded attitude. It is advisable for these workers to receive interventions such as regular educational programs early in their careers.


International Psychogeriatrics | 2014

Path analysis of suicide ideation in older people

Seolmin Kim; Jee Hyun Ha; Jaehak Yu; Doo-Heum Park; Seungho Ryu

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Seungho Ryu

Sungkyunkwan University

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Seog Ju Kim

Seoul National University

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Chul-Jin Shin

Chungbuk National University

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Dae Hyun Yoon

Seoul National University Hospital

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