Yong-Sil Kweon

Catholic University of Korea | CUK · Department of Psychiatry

Background In South Korea, the leading cause of youth death has been suicide for about 20 years. In this study, we conducted a multi-method psychological autopsy to identify the psychiatric diagnosis, developmental history, personality traits, family history, school life, warning signs of suicide, and risk factors related to suicide for the first t...

Objective: The purpose of the present study was to identify adolescents' suicide subgroups using five indicators (depression, anxiety, suicide ideation, and planned and attempted suicide), and explore the distinctive features of each subgroup. Methods: This study included 2,258 teenagers from four schools. Both adolescents and their parents, who...

Background: This study aims to evaluate suicidal ideation, depression, and insomnia among parent survivors of adolescents who died by suicide and their relevant risk factors using psychological autopsy results from South Korea. Methods: The participants were 42 parent survivors (10 fathers and 32 mothers) of 35 adolescents who died by suicide. W...

IntroductionSuicide is the leading cause of death among adolescents in Korea. Psychiatric disorders are well-known risk factors for suicide, but the proportion of children and adolescents who died by suicide and who had received psychiatric treatment is low. This study aims to examine how many school students who died by suicide were advised by the...

Objective Temperament is close to susceptibility to stress and the increased level of stress may lead problematic smartphone use (PSU). In this study, the relationships between harm avoidance (HA) as a personality trait, daily traits, and PSU in children and adolescents were investigated. Methods At baseline, all participants (184 children and ado...

We analyzed the clinical characteristics and suicide-related factors of students who died by suicide in Korea in 2016–2020, based on teachers’ reports. Using data on total suicide deaths (N = 654, mean age = 16.0, 52.6% boys) collected by the Ministry of Education of Korea, we investigated the demographic and clinical characteristics and suicide-re...

Background: The healthcare workers (HCWs) were exposed to never-experienced psychological distress during the early stage of the coronavirus disease 2019 (COVID-19) pandemic. The aim of this study was to investigate how the COVID-19 pandemic affected the mental health of HCWs during the hospital lockdown period due to mass healthcare-associated inf...

Exploring the risk factors of adolescent suicide is important for effective suicide prevention. This study explored the clustering of adolescent suicides based on six risk factors: mental disorder, broken family, depression, anxiety, previous suicide attempts, and deviant behaviors. Using 173 student suicide reports obtained from the Ministry of Ed...

Objectives: Our study aimed to analyze the demographic and clinical characteristics of children and adolescents during their first visit to psychiatric outpatient departments for the management of suicidal ideation and behavior, and to compare the changes before and in 2012 or later. Methods: This multicenter study was conducted at five universi...

Objective: This study examined the diagnostic validity of a three-item ultra-brief screening tool for online gaming disorder in line with the gaming disorder criteria in the International Classification of Diseases 11th Revision. Methods: The Three-item Gaming disorder Test-Online-Centered (TIGTOC) was composed of three items using a four-point...

Background and aim: Whereas many studies on Internet gaming disorder (IGD) have used self-report questionnaires, only a few have adopted clinical interviews and samples. The current study aimed at using data from face-to-face diagnostic interviews, based on the criteria for IGD in the DSM-5, to determine the Internet, gaming, and smartphone usage...

The clinical course of problematic smartphone use (PSU) remains largely unknown due to a lack of longitudinal studies. We recruited 193 subjects with smartphone addiction problems for the present study. After providing informed consent, the subjects completed surveys and underwent comprehensive interviews regarding smartphone usage. A total of 56 s...

Purpose: The risk and protective factors of Internet gaming disorder (IGD) could vary by individual. The identification of more homogeneous subgroups may lead to better understanding of gaming behaviors and their consequences in adolescents. The purpose of this study was to investigate the prevalence of IGD among the subgroups defined by cluster a...

Objectives: his study investigated the risk factors leading to serious suicide attempts with high medical severity. Methods: Nine hundred and eighty-two patients who visited the emergency room after attempting suicide were divided into two groups: suicide attempters with high medical severity (25.3%) and those with low medical severity (74.7%)....

Background: Youth suicides have diverse characteristics according to the young people's developmental stages. Warning signs and communication of suicidal intent can be vague among early adolescents, while mental health problems may be more evidently related to suicidal ideation in older adolescents. Understanding the developmental characteristics o...

The American Psychiatric Association (APA) included internet game disorder (IGD) in section III of the Diagnostic and Statistical Manual of Mental Disorders-Fifth Edition (DSM-5) on the condition that it guaranteed more clinical research and experience. The World Health Organization (WHO) also included Game Disorder (GD) in the 11th final revision...

The increased prevalence of Internet Gaming Disorder (IGD) and the inclusion of IGD in DSM-5 and ICD-11 emphasizes the importance of measuring and describing the IGD symptoms. We examined the psychometric properties of the Diagnostic Interview for Internet Addiction (DIA), a semi-structured diagnostic interview tool for IGD, and verified the applic...

The behavioral inhibition/activation systems (BIS/BAS) have been considered to be predictors of Internet addiction, mediated by clinical variables such as anxiety and depression. However, resilience has been suggested as a protective factor toward Internet addiction, and certain sex differences in resilience buffering the effects of vulnerability h...

This study aimed to estimate overreporting (the false positive) and underreporting (false negative) rates in self-reported IGD assessment compared with clinical diagnosed IGD. The study population consisted of 45 with IGD and 228 without IGD based on clinical diagnosis from the Internet User Cohort for Unbiased Recognition of Gaming Disorder in Ear...

Background: Relatively little is known about which neuropsychological factors promote recovery from Internet gaming disorder (IGD). Methods: With informed consents, a cohort study was conducted in Seoul metropolitan area, South Korea, to investigate the course of IGD in youths. At baseline, we assessed psychosocial measures and gaming related measu...

Background and objectives The ubiquitous Internet connections by smartphones weakened the traditional boundaries between computers and mobile phones. We sought to explore whether smartphone-related problems differ from those of computer use according to gender using latent class analysis (LCA). Methods After informed consents, 555 Korean middle-sc...

Objective: We aimed to examine the effect of emotion regulation training in patients with panic disorder (PD) by measuring heart rate variability (HRV). Methods: Forty-eight patients with PD were randomly divided into emotion regulation group (n=25) and no-regulation group (n=23). Three five-minute ECG recordings were taken in the following stat...

Objective The present study aimed to investigate predictors for planned suicide attempters. Methods This study included 1,003 patients who attempted suicide and visited emergency department. They were divided into two groups, planned suicide attempters (SAs; n=133 [13.3%]) and impulsive SAs (n=870, [86.7%]), and the demographic variables, clinical...

Case management interventions for suicide attempters aimed at helping adjust their social life to prevent reattempts have high nonparticipation and dropout rates. We analyzed the clinical characteristics of the group who refused to participate in the suicide prevention program in Korea. A total of 489 patients with a suicide attempt who visited Uij...

Overactive bladder (OAB) is defined as urgency, usually with frequency and nocturia, and with or without urge incontinence. Duloxetine, an antidepressant that inhibits reuptake of serotonin and norepinephrine, is indicated for the treatment of stress urinary incontinence in Europe. In this paper, we present a case of a 17-year-old female patient wi...

In facial expression perception, a distributed network is activated according to stimulus context. We proposed that an interaction between brain activation and stimulus context in response to facial expressions could signify a pattern of interactivity across the whole brain network beyond the face processing network. Functional magnetic resonance i...

Brief Emergency Room Suicide Risk Assessment (BESRA). SES: social economic status, MI: myocardial Infarction, COPD: chronic obstructive pulmonary disease, CKD: chronic kidney disease, CVA: cerebrovascular accident.

Patients visiting the emergency department (ED) after a suicide attempt are generally assessed for suicide risk by psychiatric residents. Psychiatric residents' competence in evaluating the risk posed by the patients who attempted suicide is critical to preventing suicide. We investigated factors considered important by psychiatric residents when e...

In major depressive disorder (MDD), as a network-level disease, the pathophysiology would be displayed to a wide extent over the brain. Moreover, the network-wide changes could be dependent on the context of affective processing. In this study, we sought affective state-dependent changes of the brain functional network by applying a graph-theoretic...

The present study aimed to examine the psychometric properties of the Korean version of Stanford Acute Stress Reaction Questionnaire (SASRQ). A Korean version of the SASRQ was produced through forward translation, reconciliation, and back translation. A total of 100 healthy, non-clinical participants were selected through screening and clinical int...

This study compared demographical and clinical variables between first and multiple suicide attempters and investigated risk and protective factors predicting multiple attempts. 228 patients visiting emergency department after attempting suicide were divided into two groups: first attempter (n=148, 64.9%) and multiple attempter (n=80, 35.1%). Demog...

The objective was to compare autonomic response to threatening stimuli between patients with panic disorder (PD) and healthy volunteers by using 5-min recordings of heart rate variability (HRV). Twenty-seven patients with PD and 20 healthy controls were recruited. The first 5-min measurement of HRV was conducted at resting state. HRV measurement du...

The aim of this study was to investigate the psychometric properties of a Korean version of Interpersonal Sensitivity Measure (IPSM). A Korean version of the IPSM (IPSM-K) was produced through forward translation, reconciliation, and back translation. A total of 338 healthy, non-clinical participants were selected through screening and clinical int...

Aim: To compare emotion recognition patterns between patients with panic disorder (PD) and healthy volunteers and to analyze the correlation between the degree of emotion recognition impairment and symptom severity in patients with PD. Methods: Twenty-four patients with PD and 20 healthy controls were tested with a facial emotional expression re...

Few studies have focused on the characteristic features of drug overdose in children and adolescents who have attempted suicide in Korea. The present study examined the characteristics of drug overdose in children and adolescents who visited the emergency room following drug ingestion for a suicide attempt. The medical records of 28 patients who we...

The aim of this study was to investigate the effect of resilience on depression and life satisfaction in patients with end-stage renal disease (ESRD) on Hemodialysis.

Background: Suicide is a major public health concern. The elderly have the highest rate of suicide and they make more lethal suicide attempts and have fewer psychiatric interventions than young people. Furthermore, they have old-age specific psychosocial difficulties. The present study investigated psychosocial risk factors and characteristics of...

We investigated the deficit in the recognition of facial emotions in a sample of medicated, stable Korean patients with schizophrenia using Korean facial emotion pictures and examined whether the possible impairments would corroborate previous findings. Fifty-five patients with schizophrenia and 62 healthy control subjects completed the Facial Affe...

Antidepressants used to treat depression are frequently associated with sexual dysfunction. Sexual side effects affect the patient's quality of life and, in long-term treatment, can lead to non-compliance and relapse. However, studies covering many antidepressants with differing mechanisms of action were scarce. The present study assessed and compa...

This study investigated the impact of executive function on the performance of two different affective tasks, the Facial Affect Identification Task (FAIT) and the Iowa Gambling Task (IGT), in patients with schizophrenia. Thirty-nine patients with schizophrenia and 33 healthy controls completed the FAIT and the IGT, followed by the Wisconsin Card So...

We investigated the neural basis underlying the effect of race on incidental facial emotional processing using functional MRI. Thirteen healthy Korean men underwent functional MRI while viewing photographs of Korean (own-race) and Caucasian (other-race) emotional faces while performing a sex discrimination task. Responses to other-race relative to...

The present study aimed to: (i) provide preliminary data on the effectiveness and tolerability of atypical antipsychotics, amisulpride (AMSP) and quetiapine (QTP) for patients with delirium and (ii) investigate whether the two drugs affect sleep differently and further relation with the recovery time of delirium. Forty patients with delirium were r...

Catechol-O-methyltransferase, which has a functional genetic polymorphism, plays an important role in dopamine metabolism. The study analyzed the association between the catechol-O-methyltransferase gene polymorphism and alcohol dependence in the Korean population. Ninety-seven male alcoholics and 94 male age-matched normal controls were enrolled i...

The purpose of the present paper was to investigate the relationship between the first exon at position +49 (A/G) polymorphism of the cytotoxic T lymphocyte antigen 4 (CTLA4) gene and bipolar disorder. Among the Korean patients diagnosed with bipolar disorder according to Diagnostic and Statistical Manual of Mental Disorders (4th edn; DSM-IV), 90 p...

Objectives:Mental health problems have been found to be more common among juvenile delinquents. This report assessed the reliability, and validity of the MAYSI-2K(Massachusettes Youth Screening Instrument-2 Korean) in Korean delinquents to examine the utility as a screening measure. Methods:The study consisted of 119 male juvenile youths(mean age 1...