Analyzing Co-Occurrence of Non-Suicidal Self-Injury With Suicidal Ideation and Related Factors Among Adolescents in Jeju Island.

Objectives: Non-suicidal self-injury (NSSI) and suicidal behavior, including suicidal ideation (SI) and suicide attempts, are important predictors of suicide in adolescents. This study aimed to investigate the associations between NSSI, SI, NSSI+SI, mental health problems, and family factors in Korean adolescents in Jeju Island, with an emphasis on key findings. Methods: A total of 561 adolescents completed self-report questionnaires regarding demographics, NSSI, SI, suicidal behavior, perceived family functioning, and mental health problems, which were assessed using Center for Epidemiological Studies Depression Scale for Children, Screen for Children Anxiety-Related Disorders (SCARED), and Youth Self-Report (YSR). Data were analyzed using descriptive statistics, one-way analysis of variance, chi-square test, post-hoc analyses, and multivariate logistic regression. Results: In this study, 22.3% of adolescents reported either NSSI or SI, with 5.5% reporting NSSI and 20.7% reporting SI. Combined (NSSI+SI) group showed a significantly higher SCARED score, anxiety/depression, thought problems, attention problem, and rule breaking on YSR than did the SI only group. Higher level of depression and anxiety were significantly associated with NSSI and SI. Female sex and perceived family dissatisfaction were significantly associated factors for SI, but not for NSSI in multivariate logistic regression. Conclusion: This study provides insights into the clinical characteristics and associated factors among adolescents with NSSI, SI, and NSSI+SI in Jeju Island. Identifying these results can inform the development of targeted prevention and intervention strategies to mitigate the negative consequences of these behaviors and contribute to a better understanding of the role of family in this context.

A Survey on the Journal of the Korean Academy of Child and Adolescent Psychiatry: Implications for Growth and Development.

Objectives: This study aimed to assess the status of the Journal of the Korean Academy of Child and Adolescent Psychiatry (JKACAP) and propose measures for its growth and development. Methods: The study was conducted using a questionnaire survey targeting members of the Korean Academy of Child and Adolescent Psychiatry. The six key elements analyzed were Access to the journal, Convenience following conversion to English, Recognition as an international journal and institutional achievements, Author perspectives on manuscript submission,Transition to an online-only journal, and Content and identity of the journal. Results: The survey revealed that email notification was highly effective for Journal Accessibility, with the website and search engines also frequently being used by members. Conversion to English in 2018 initially impacted readability and submission rates, but these concerns have decreased over time. However, the Recognition of JKACAP as an international academic journal was still not on par with SCIE journals, highlighting the need for further efforts towards SCIE inclusion. Despite these challenges and limited research opportunities, there was an active intention among members to submit manuscripts. Respondents showed a notable preference for the Transition to an online-only journal. Regarding content and identity of the JKACAP, members predominantly favored review articles and perceived the journal as a research and communication platform for Korean child and adolescent psychiatrists. Conclusion: The results indicate the need for JKACAP to enhance its digital accessibility, provide more support for domestic and international authors, and actively seek SCIE indexing. Addressing the varied content preferences of its members, improving the submission process, and transitioning to an online-only format could further its growth and solidify its position as an internationally recognized academic journal in the field of child and adolescent psychiatry.

Comorbid Psychiatric Symptom Associated With Oppositional Defiant Symptom in Community School-Age Children.

Objectives: Oppositional defiant disorder (ODD) is often comorbid with other psychiatric disorders in childhood. This study aimed to investigate comorbid psychiatric symptoms and associated factors in elementary school children with symptoms of ODD. Methods: The participants consisted of 205 mother-offspring pairs. Psychiatric symptoms were measured using the Diagnostic Predictive Scales and Korean Child Behavior Checklist. Psychiatric comorbid symptoms were compared between children with ODD symptom and those without ODD symptom. Multivariate logistic regression analysis was used to estimate the odds ratio of psychiatric symptom on ODD. Results: ODD group had a significant association with internalizing and externalizing problem (p=0.001, p<0.001, respectively). ODD group were more comorbid with anxiety disorder, depressive disorder, attention-deficit/hyperactivity disorder, and conduct disorder. Among psychiatric disorder, generalized anxiety disorder (GAD) (adjusted odds ratio [AOR]=18.620, p<0.001) and conduct disorder (AOR=9.529, p=0.014) were associated with ODD symptom. Conclusion: These findings suggest that children with ODD symptom had significantly higher rates of comorbid psychiatric symptoms. And GAD and conduct disorder are related to ODD symptom.

Effects of Group Comprehensive Behavioral Intervention for Tics in Children With Tourette's Disorder and Chronic Tic Disorder.

Objectives: Comprehensive behavioral intervention for tics (CBIT) is effective in children with chronic tic disorders. This study aimed to assess the effect of group-based CBIT (group-CBIT) on tic severity and comorbid symptoms. We compared the efficacy of group CBIT with that of a control. Methods: Thirty children with chronic tic disorder or Tourette's disorder were enrolled in this study. Eighteen were assigned to the group-CBIT for eight sessions, and 12 were assigned to the control group. Tics and comorbid symptoms were assessed pre- and post-intervention using the Yale Global Tic Severity Scale (YGTSS), Premonitory Urge for Tics Scale, attention-deficit hyperactivity disorder Rating Scale-IV, Children's Yale-Brown Obsessive-Compulsive Scale, and the Korean-Children Behavioral Checklist. We compared the pre- and post-intervention results of each group and determined the difference in the pre- and post-intervention results between intervention and the control group. Results: The YGTSS motor and vocal tic interference, global impairment, and global severity scores decreased in the intervention group only. Group CBIT was superior in reducing the motor tic interference, impairment score, and global severity score to the control group. Conclusion: The group-CBIT showed an improvement in tic symptoms, especially in reducing the level of interference and impairment of tics.

Dissociative Identity Disorder in an Adolescent With Nine Alternate Personality Traits: A Case Study.

Since dissociative identity disorder (DID) has symptoms similar to schizophrenia, such as auditory hallucinations and delusional thoughts of being controlled, there are difficulties in its differential diagnosis. A 16-year-old adolescent male patient who was previously diagnosed with schizophrenia from a different hospital was admitted to our inpatient psychiatric unit for the evaluation of auditory hallucinations and suicide attempts. Through psychiatric evaluations, it was determined that the patient suffered from identity alternation, dissociation, and amnesia. As for the diagnostic evaluations, the following measures were implemented: a psychiatric interview regarding the diagnostic criteria, mental status examination, laboratory tests, brain imaging studies, electroencephalography, and full psychological test for adolescents, and the self-reported measure of the Adolescent Dissociative Experiences Scale. The patient was diagnosed with DID, and the following treatments were administered: pharmacotherapy, ego state therapy, psychoeducation regarding emotions, trauma-focused psychotherapy including stabilization, and family therapy. Following treatment, in the internal dimensions, the patient was able to recognize the nine alternate identities in charge of his emotions, which established a basis for the potential integration of identities. In the external dimensions, he showed improvements in the aspects of family conflicts and issue of school refusal. This is the first reported case of DID in an adolescent in Korea; it emphasizes the consideration of DID in the differential diagnosis of other mental illnesses such as schizophrenia, bipolar disorder, and posttraumatic stress disorder and expands the treatment opportunities for DID by sharing the procedures of ego state therapy.

Concept of Synchronized Individuation Based on the Characters in a Movie and a Fairy Tale.

Objectives: Among adolescent development tasks, being independent of parents is an essential process for emotional and physical separation. There are many conflicts of separation and individuation between parents and adolescents; however, most clinicians explore the process of separation and individuation only from adolescents' perspective. Whether simultaneously or sequentially, separation-individuation occurs between adolescents and parents, respectively. The authors have already introduced the theory of synchronized individuation in a clinical case to explain the concept of this intersubjective phenomena. This study also attempts to prove the synchronized individuation theory through the interaction of characters in a movie and a fairy tale. Methods: The authors present the basis for the theory of synchronized individuation of adolescence through the growing process of Mason Junior, the main character of the movie "Boyhood," and from the process of the separation of a hen, Sprout, and an orphaned duckling in "The hen who dreamed she could fly." Results: Synchronized individuation was developed and observed from Mason, the son's perspective in "Boyhood," and Sprout, the mother's subjective perspective in the story of the hen. Conclusion: Increasing conflict and mutual impact in the relationship between adolescents and parents, ambivalent feelings for separation, selective identification of each other, mutual respect through mutual recognition, and role changes in relationship position were confirmed. Sons and mothers were individualized with synchronization.

The Concept of Synchronization in the Process of Separation-Individuation Between a Parent and an Adolescent.

Objectives: Humans experience the process of separating-individuating themselves from an object via the conflict between dependence and independence within the self. The separation-individuation theory focuses on the psychological process of individualizing oneself. Although adolescents' individuation from their parents is based on intrapsychic events, there is an increasing need for an intersubjective understanding of it. We applied intersubjectivity to adolescents and parents to interpret and find solutions for problems arising during their individuation process. Methods: This study retrospectively reviewed a case of a son and his father treated by the author. From the study subject, contents that represent adolescents and parents' interaction and separation in the individualization process were extracted and analyzed, and their experiences shared in this process were reconstructed from the therapist's perspective. Results: From the case involving an adolescent boy with conduct problems and his interactions with his father, the authors observed the phenomenon of intersubjectivity and proposed the concept of "synchronized individuation" between adolescents and parents. As adolescents rapidly grow and change, they experience various dynamic interactions with their parents. Through learning to tolerate the conflicts and ambivalent tension inherent in this individuation process, adolescents and their parents develop their new identity. Conclusion: "Synchronized individuation" should be understood as complementary to, rather than exclusive from, the existing concept of the separation and individuation. It offers a new paradigm with which to understand adolescent-parent conflicts in the process of separation- individuation.

Association between birth weight and neurodevelopmental disorders assessed using the Korean National Health Insurance Service claims data.

The risk of neurodevelopmental disorders in low birth weight (LBW) infants has gained recognition but remains debatable. We investigated the risk of attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) in school-aged children according to their birth weight. We conducted a retrospective cohort study using the Korean National Health Insurance claims data of 2,143,652 children who were born between 2008 and 2012. Gestational age of infants was not available; thus, outcomes were not adjusted with it. Not only infants with birth weights of < 1.5 kg, but also 2.0-2.4 kg and 1.5-1.9 kg were associated with having ADHD; odds ratio (OR), 1.41 (95% confidence interval [CI] 1.33-1.50), and 1.49 (95% CI 1.33-1.66), respectively. The OR in infants with birth weights of 2.0-2.4 kg and 1.5-1.9 kg was 1.91 (95% CI 1.79-2.05) and 3.25 (95% CI 2.95-3.59), respectively, indicating increased odds of having ASD. Subgroup analysis for children without perinatal diseases showed similar results. In this national cohort, infants with birth weights of < 2.5 kg were associated with ADHD and ASD, regardless of perinatal history. Children born with LBW need detailed clinical follow-up.

The intergenerational transmission of maternal adverse childhood experiences on offspring's psychiatric disorder and the mediating role of maternal depression: Results from a cross sectional study.

Maternal adverse childhood experiences (ACEs) may negatively affect the mental health and development of their offspring. The purpose of this study was to investigate the association of maternal ACE and offspring's psychiatric disorder and the mediating effect of maternal depression. The subjects included 463 mothers (42.78 ± 5.68 years) and their offspring aged 6-18 years (13.26 ± 3.90 years). Mothers reported their ACE before age 18 and completed the Beck Depression Inventory-II and Diagnostic Predictive Scales (DPS), a screening tool for offspring's psychiatric disorder. 35.42% of subjects had at least one ACE, and 11.0% reported three or more ACEs. Higher maternal ACE scores were associated with a significantly higher prevalence of offspring's psychiatric disorders (p < 0.001). Household dysfunction of maternal ACE (OR = 2.263, p < 0.001) is significantly associated with offspring's psychiatric disorder. In the mediation model in which the household dysfunction affects the number of offspring's psychiatric disorders, the partial mediation model through maternal depression was significant. The mother's experience of household dysfunction before the age of 18 has a significant impact on her offspring's psychiatric disorder and supported significant mediation through maternal depression. Further research is needed to determine the mechanisms of intergenerational transmission of ACE and offspring's psychopathology.

Preliminary Report of Validity for the Infant Comprehensive Evaluation for Neurodevelopmental Delay, a Newly Developed Inventory for Children Aged 12 to 71 Months.

OBJECTIVES: Early detection of developmental issues in infants and necessary intervention are important. To identify the comorbid conditions, a comprehensive evaluation is required. The study's objectives were to 1) generate scale items by identifying and eliciting concepts relevant to young children (12-71 months) with developmental delays, 2) develop a comprehensive screening tool for developmental delay and comorbid conditions, and 3) assess the tool's validity and cut-off. METHODS: Multidisciplinary experts devised the "Infant Comprehensive Evaluation for Neurodevelopmental Delay (ICEND)," an assessment method that comes in two versions depending on the age of the child: 12-36 months and 37-71 months, through monthly seminars and focused group interviews. The ICEND is composed of three parts: risk factors, resilience factors, and clinical scales. In parts 1 and 2, there were 41 caretakers responded to the questionnaires. Part 3 involved clinicians evaluating ten subscales using 98 and 114 questionnaires for younger and older versions, respectively. The Child Behavior Checklist, Strengths and Difficulties Questionnaire, Infant- Toddler Social Emotional Assessment, and Korean Developmental Screening Test for Infants and Children were employed to analyze concurrent validity with the ICEND. The analyses were performed on both typical and high-risk infants to identify concurrent validity, reliability, and cut-off scores. RESULTS: A total of 296 people participated in the study, with 57 of them being high-risk (19.2%). The Cronbach's alpha was positive (0.533-0.928). In the majority of domains, the ICEND demonstrated a fair discriminatory ability, with a sensitivity of 0.5-0.7 and specificity 0.7-0.9. CONCLUSION: The ICEND is reliable and valid, indicating its potential as an auxiliary tool for assessing neurodevelopmental delay and comorbid conditions in children aged 12-36 months and 37-71 months.

The Impact of Maternal Adverse Childhood Experiences on Offspring's Internalizing and Externalizing Problems.

OBJECTIVE: Adverse childhood experiences (ACEs) are associated with negative physical and mental health outcomes across the lifespan, but research on intergenerational transmission of maternal ACEs and its impact on the offspring's mental health problems are limited. The study examines the effects of maternal ACEs on the risk of internalizing or externalizing problems among offspring. METHODS: There were 450 mother-child dyads. Mothers completed the Adverse Childhood Experiences Questionnaire. The child outcomes included internalizing and externalizing problems assessed by the Korean Child Behavior Checklist (K-CBCL) and Korean Youth Self-Report (K-YSR), depression assessed by the Center for Epidemiological Studies Depression Scale for Children (CES-DC) and anxiety assessed by the Screen for Child Anxiety Related Emotional Disorders (SCARED). RESULTS: 36.1% of mothers experienced at least one ACE, and 11.1% experienced three or more ACEs. Cumulative maternal ACEs were associated with internalizing problems, externalizing problems, depression and anxiety in the offspring. Household dysfunction from maternal ACEs was significantly associated with delinquent behavior, anxiety/depression, and somatic complaints in the offspring. CONCLUSION: The findings support the hypothesis that maternal ACEs are related to mental health problems in the offspring. Further research is needed to determine the factors mediating intergenerational transmission as well as intervention strategies to prevent ACEs and mental health problems in the offspring.

Intellectual Functioning of Pediatric Patients with Chronic Kidney Disease: Results from the KNOW-Ped CKD.

BACKGROUND: Chronic kidney disease (CKD) has a negative impact on growth and development in children and is a risk factor for neurocognitive impairment; however, there is limited research on the cognitive function of children and adolescents with CKD. This study therefore aimed to investigate the mean intelligence and risk factors for low intelligence in children and adolescents with CKD. METHODS: Eighty-one patients with CKD under 18 years old were included in the KoreaN cohort study for Outcomes in patients With Pediatric Chronic Kidney Disease (KNOW-Ped CKD). Participants completed either the Wechsler Intelligence Scale for Children (6-16 years), or Wechsler Adult Intelligence Scale (> 16 years). RESULTS: The mean full-scale intelligence quotient (IQ) was 91 ± 19; 24.7% of participants scored a full-scale IQ below 80. Participants with a short stature (height Z scores < -1.88), failure to thrive (weight Z scores < -1.65), more severe CKD stage (≥ IIIb), longer duration of CKD (≥ 5 years), and those who were Medicare or Medicaid beneficiaries, had significantly lower mean full-scale IQs. CONCLUSION: On linear regression analysis, the association between the full-scale IQ, and longer duration of CKD and growth failure, remained significant after controlling for demographic and clinical variables. It is therefore necessary to investigate cognitive impairment in pediatric patients with CKD who exhibit growth failure or for a longer postmorbid period. It is believed that early interventions, such as kidney transplantation, will have a positive effect on IQ in children with CKD, as the disease negatively affects IQ due to poor glomerular filtration rate over time. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT02165878.

Association between Maternal Adverse Childhood Experiences and Risk of Post-traumatic Stress Disorder in the Offspring.

OBJECTIVES: Adverse childhood experiences (ACEs) of mothers may negatively affect the mental health of their offspring. Little is known about the intergenerational effect of maternal ACE on post-traumatic stress disorder (PTSD) in the offspring. This study inves-tigated the impact of maternal ACEs on PTSD in the offspring. METHODS: A total of 156 mothers with children aged 13-18 years completed the Diagnostic Interview Schedule for Children (DISC) Predictive Scales to determine the presence of psychiatric disorders in their offspring. The subjects completed the ACE questionnaire and the Early Trauma Inventory Self-Report-Short Form. Multivariable logistic regression was used to analyze the relationship between ma-ternal ACEs and PTSD in the offspring. RESULTS: Of the mothers, 23.7% had at least one ACE, and PTSD was reported in 21.8% of the offspring. The offspring of the mothers in the ACE group had a significantly higher rates of traumatic experiences and PTSD than the offspring of the mothers in the no ACE group. Maternal household dysfunction independently predicted offspring PTSD [odds ratio (OR)=3.008, p=0.05), and three or more maternal ACEs were significantly related to PTSD in the offspring (OR=10.613, p=0.025). CONCLUSION: Maternal ACEs have a significant impact on the risk of traumatic experiences and PTSD in the offspring. These findings suggest the presence of intergenerational transmissions by which maternal ACEs affect the mental health of the offspring.

Association between Maternal Adverse Childhood Experiences and Attention-Deficit/Hyperactivity Disorder in the Offspring: The Mediating Role of Antepartum Health Risks.

OBJECTIVES: This study aimed to examine the effect of maternal adverse childhood experiences (ACEs) on the attention-deficit/hyper-activity disorder (ADHD) symptoms in the offspring and to examine the mediating role of antepartum health risk on the intergenera-tional transmission of maternal ACEs. METHODS: The participants consisted of 461 mother-child dyads. Mothers completed the ACEs questionnaire and Diagnostic Predictive Scales. Multivariate logistic regression analysis was used to estimate the risk of ADHD symptoms in the offspring of mothers with ACEs and the mediating effect of antepartum health risks by path analysis. RESULTS: In all, 35.4% (n=163) had at least one maternal ACE, and 11.1% (n=51) had three or more. Compared to the non-ADHD symp-tom group, the group of offspring with ADHD symptoms showed a significant association with maternal ACE score (p<0.001) and an-tepartum health risks (p<0.001). Multivariate analysis further showed a significant association between the sum of maternal ACEs [odds ratio (OR)=1.264, 95% confidence interval (CI)= 1.060-1.516, p=0.009], antepartum health risks (OR=1.236, 95% CI=1.036-1.475, p= 0.019), and ADHD symptoms in the offspring. In the mediation model in which the mother's ACE score affected the offspring's ADHD symptoms, partial mediation through antepartum health risks was found to be significant (B=0.041, 95% CI=0.011-0.124). CONCLUSION: Maternal ACEs are significantly related to the incidence of ADHD symptoms in the offspring and antepartum health risks exert an indirect effect. These findings suggest that maternal ACEs have a negative impact on the offspring's brain development through intergenerational transmission, resulting in neurodevelopmental disorders such as ADHD.

The Concept and Historical Background of Custody Evaluation.

This article reviews a wide range of literature on the standards and process of child custody evaluation in the US, and proposes custody evaluation standards appropriate to Korea. Custody evaluation refers to the process of making psychiatric and psychological evaluations of each parent and the child during a custody dispute and presenting to the family court a report of custody evaluation with the aim of safeguarding the best interests of the child. In the past, it was thought that children arethe fathers' possessions or that younger children should be raised by the mother; however, currently, custody rights are evaluated in accordance with the principle of the best interests of the child. The principle is all-encompassing and vague and hence, the court makes increasingly more requests to mental health professionals for custody evaluation. Since the Seoul Family Court introduced the expert consultation system in 2017, the involvement of mental health professionals in child custody decisions has increased in Korea. Custody evaluators should try to be neutral and find the objective facts, keeping in mind that their role is to aid the court in making a custody decision.

Custody Evaluation Process and Report Writing.

As in western countries, divorce rates in South Korea have recently been rising, and family disruption has become one of serious social problems. Parents are able to express their opinions and wishes confidently, but the thoughts and wishes of children, especially infants and young children, tend to be ignored. Children can also experience several emotional and behavioral problems during the process of and after their parents' divorce. When South Korean family courts determine custody arrangements, they typically do not have a systematic strategy and process based on custody evaluation to help children and their parents overcome conflicts and build healthy parent-child relationships after divorce. Furthermore, under the current court system, it is difficult for mental health specialists and child psychiatrists to intervene in familial conflicts as mediators or therapists during the course of divorce proceedings. Acknowledging these limitations, the South Korean family court system implemented a formal program for custody evaluations by child psychiatrists and psychologists in 2017. However, they have faced challenges such as a shortage of experienced specialist and lack of a training system or instruments for evaluation. In this paper, the authors aim to share professional knowledge of and experiences with aspects of the custody evaluation process, such as indications, procedures, methods, psychological tests, resources, and final report writing, to better serve children and their parents undergoing a painful divorce process.

Custody Evaluation in High-conflict Situations Focused on Domestic Violence and Parental Alienation Syndrome.

In a divorced family, child-centered custody evaluation is essential to ensure the child's best interests and healthy adaptation. A mental health professional's role and involvement are required in gaining an in-depth understanding of various environments and dynamics surrounding the child and family. Domestic violence, including child abuse and intimate partner violence (IPV) or parental alienation syndrome (PAS), is often observed in cases of custody evaluation in high-conflict divorced families, sometimes accompanied by allegations. Such cases warrant an extremely careful approach by the evaluator, who needs to be competent in interpreting the familial dynamics based on a reasonable context understanding. Genuine professionalism is a must for a custody evaluator to best help the child and carry out a high-quality custody evaluation process, and evaluators need to be ready for this task through adequate preparation and empowerment. This article is devoted to examining custody evaluation in divorced families in cases of IPV, child abuse, and PAS.

Comparison of Services for Autism Spectrum Disorder in Massachusetts with Those in Seoul.

BACKGROUND: This article intended to identify and describe areas in need of services and interventions for individuals with autism spectrum disorder (ASD) and their families in Seoul, Korea. METHODS: A descriptive comparison was made between available services and interventions in Seoul, Korea and Massachusetts, USA. Relevant information was obtained through sending phone/email inquiries to the governments and organizations, visiting their official websites, and searching for published articles or reports. RESULTS: In a few areas such as level of education, economy, and general quality of healthcare, Seoul was found to be similar to Massachusetts. However, in terms of services and interventions for individuals with ASD and their families, especially early identification and intervention, special education, care coordination, school-based programs, and transition to adulthood, Massachusetts was shown to have far more availability. CONCLUSION: The limited availability of services and interventions for individuals with ASD and their families in Seoul in comparison to Massachusetts, underlines target areas for further investment and development.

Incidence and Comorbidity of Reactive Attachment Disorder: Based on National Health Insurance Claims Data, 2010-2012 in Korea.

OBJECTIVE: We aimed to investigate the current diagnostic incidence, and medical and psychiatric comorbidities of reactive attachment disorder (RAD) using the National Health Insurance Review and Assessment (HIRA) claims data. METHODS: To examine the diagnostic incidence, we selected patients who were under 10-year-old and who had at least one medical claim containing a 10th revision of the International Statistical Classification of Diseases and Related Health Problems (ICD-10) code for RAD (F94.1 and F94.2) and who had not been diagnosed in the previous 360 days, from 2010 to 2012. In this study, we used the term 'reactive attachment disorder' representing for both RAD per se and Disinhibited social engagement disorder. Comorbid disorders were categorized according to ICD-10. RESULTS: Among 14,029,571, the total population under 10-year-old during 2010-2012, incident cases of RAD were 736. The mean diagnostic incidence of RAD was 5.25 per 100,000 annually. Language disorders (F80-84) were the most common psychiatric comorbidities in both boys and girls in age groups 0-3 years and 4-6 years, and attention deficit hyperactivity disorder was the most common in both sex aged 7-9 years. In non-psychiatric comorbidities, diseases of the respiratory system (J00-99) were the commonest in both sex in all age groups, and diseases of the digestive system (K00-99) were the next. CONCLUSION: RAD was very rare in practice and would be disguised as other psychiatric disorders. Children with RAD might have more medical comorbidities than typically developed children.

Korean Version of Inventory of Complicated Grief Scale: Psychometric Properties in Korean Adolescents.

We aimed to validate the Inventory of Complicated Grief (ICG)-Korean version among 1,138 Korean adolescents, representing a response rate of 57% of 1,997 students. Participants completed a set of questionnaires including demographic variables (age, sex, years of education, experience of grief), the ICG, the Children's Depression Inventory (CDI) and the Lifetime Incidence of Traumatic Events-Child (LITE-C). Exploratory factor analysis was performed to determine whether the ICG items indicated complicated grief in Korean adolescents. The internal consistency of the ICG-Korean version was Cronbach's α=0.87. The test-retest reliability for a randomly selected sample of 314 participants in 2 weeks was r=0.75 (P<0.001). Concurrent validity was assessed using a correlation between the ICG total scores and the CDI total scores (r=0.75, P<0.001). The criterion-related validity based on the comparison of ICG total scores between adolescents without complicated grief (1.2 ± 3.7) and adolescent with complicated grief (3.2 ± 6.6) groups was relatively high (t=5.71, P<0.001). The data acquired from the 1,138 students was acceptable for a factor analysis (Kaiser-Meyer-Olkin Measure of Sampling Adequacy=0.911; Bartlett's Test of Sphericity, χ(2)=13,144.7, P<0.001). After omission of 3 items, the value of Cronbach's α increased from 0.87 for the 19-item ICG-Korean version to 0.93 for the 16-item ICG-Korean version. These results suggest that the ICG is a useful tool in assessing for complicated grief in Korean adolescents. However, the 16-item version of the ICG appeared to be more valid compared to the 19-item version of the ICG. We suggest that the 16-item version of the ICG be used to screen for complicated grief in Korean adolescents.