Clinical Utility of the Minnesota Multiphasic Personality Inventory-Adolescent Restructured Form in the Assessment of Internalizing and Externalizing Disorders in Adolescents: A Preliminary Approach

Objectives@#This study investigated whether the Minnesota Multiphasic Personality Inventory-Adolescent Restructured Form (MMPI-ARF) can differentiate between two groups of adolescents, one diagnosed with internalizing disorders and another with externalizing disorders, and examined the clinical utility of the MMPI-A-RF by examining which subscales can significantly discriminate between these two groups. @*Methods@#A total of 105 adolescents aged 13–18 years completed the MMPI-A-RF (53 internalizing disorder and 52 externalizing disorder groups). Independent t-test, chi-square test ( χ 2 ), and discriminant analysis were used to examine whether MMPI-A-RF can distinguish between the two groups. @*Results@#Sixteen MMPI-A-RF scales best predicted differences between the groups with internalizing and externalizing disorders.Fourteen scales (Higher-Order Scale [Emotional/Internalizing Dysfunction], Restructured Clinical [RC] Scale [RC demoralization, Somatic Complaints (RC1), and Low Positive Emotions (RC2)], Personality Psychopathology Five Scale [Introversion/Low Positive Emotionality-Revised, Negative Emotionality/Neuroticism-Revised], Somatic/Cognitive Scale [Malaise, Head Pain Complaints, and Gastrointestinal Complaints], Internalizing Scale [Stress/Worry, Self-Doubt], Externalizing Scale [Negative School Attitudes], Interpersonal Scale [Social Avoidance, Shyness]) were associated with the internalizing disorder group, whereas two scales (Externalizing Scale [Conduct Problems, Negative Peer Influence]) were associated with the externalizing disorder group. @*Conclusion@#The MMPI-A-RF can be an efficient assessment tool for a quick diagnosis as it can classify individuals with internalizing and externalizing disorders in clinical settings that lack a variety of assessment tools for children and adolescents.

Can We Notice the Suicidal Warning Signs of Adolescents With Different Psychometric Profiles Before Their Death?: Analysis of Teachers’ Reports

Background@#This study aimed to analyze the suicidal warning signs of Korean students with different psychometric profiles based on teacher reports. @*Methods@#This was a retrospective cohort study based on Korean school teachers’ responses to the Student Suicide Report Form. In total, 546 consecutive cases of student suicide were reported from 2017 to 2020. After missing data were excluded, 528 cases were included. The report consisted of demographic factors, the Korean version of the Strengths and Difficulties Questionnaire (SDQ) for teacher reporting, and warning signs of suicide. Frequency analysis, multiple response analysis, the χ2 test, and Latent Class Analysis (LCA) were performed. @*Results@#Based on the scores of the Korean version of the teacher-reported SDQ, the group was divided into nonsymptomatic (n = 411) and symptomatic (n = 117) groups. Based on the LCA results, four latent hierarchical models were selected. The four classes of deceased students showed significant differences in school type (χ2 = 20.410, P < 0.01), physical illness (χ2 = 7.928, P < 0.05), mental illness (χ2 = 94.332, P < 0.001), trigger events (χ2 = 14.817, P < 0.01), self-harm experience (χ2 = 30.618, P < 0.001), suicide attempts (χ2 = 24.072, P < 0.001), depressive symptoms (χ2 = 59.561, P < 0.001), anxiety (χ2 = 58.165, P < 0.001), impulsivity (χ2 = 62.241, P < 0.001), and social problems (χ2 = 64.952, P < 0.001). @*Conclusion@#Notably, many students who committed suicide did not have any psychiatric pathology. The proportion of the group with a prosocial appearance was also high. Therefore, the actual suicide warning signals were similar regardless of students’ difficulties and prosocial behaviors, so it is necessary to include this information in gatekeeper education.

A Latent Class Analysis of Suicidal Behaviors in Adolescents

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 voluntarily agreed to participate in the study, completed a series of self-reported questionnaires on depression, anxiety, suicide, self-harm, self-esteem, impulsivity, childhood maltreatment, and deviant behaviors. The data were analyzed using latent class analysis, a person-centered method. @*Results@#Four classes were detected: “high risk for suicide without distress,” “high risk for suicide with distress,” “low risk for suicide with distress,” and “healthy.” The “high risk for suicide with distress” class was the most severe on all evaluated psychosocial risk factors, namely, impulsivity, low self-esteem, self-harming behaviours, deviant behaviour problems, and childhood maltreatment, followed by “high risk for suicide without distress.” @*Conclusion@#This study identified two high risk subgroups for adolescent’ suicidality, “high risk for suicide with or without distress.” Both high risk subgroups for suicide showed higher scores for all psychosocial risk factors than low risk subgroups for suicide. Our findings suggest that special attention needs to be paid to the latent class “high risk for suicide without distress,” as this group’s “cry for help” might be relatively difficult to detect. Specific interventions for each group (e.g., distress safety plans for “suicidal potential with or without emotional distress”) need to be developed and implemented.

Suicidal Ideation, Depression, and Insomnia in Parent Survivors of Suicide: Based on Korean Psychological Autopsy of Adolescent Suicides

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. We used the Patient Health Questionnaire-9 and the Korean version of the Insomnia Severity Index to evaluate the mental health of the bereaved parents. We used the Korean Psychological Autopsy Checklist for Adolescents, the Korean Beck Depression Inventory, the Korean Version of the Barratt Impulsiveness Scale-II, and the Kiddie-Schedule for Affective Disorders and Schizophrenia-Present and Lifetime-Korean versions to evaluate the mental health of deceased adolescents before their deaths. @*Results@#The results showed that many parent survivors of suicide had developed clinically significant suicidal ideation, depression, and insomnia (75.6%, 73.2%, and 42.9%, respectively). Furthermore, the higher the incidence of traumatic events experienced by the deceased adolescents, the higher the severity of depression and insomnia experienced by surviving parents. @*Conclusion@#We should pay attention that parent survivors of suicide can suffer mental disorders after their offspring's death. In future studies, long-term follow-up studies with larger samples need to generalize our findings and clarify the causal relationship.

Association of Antipsychotics and Behavioral and Psychological Symptoms of Dementia With Cognitive Decline in Subjects With Alzheimer’s Disease

Objective@#Neuropsychiatric symptoms are common among patients with major neurocognitive disorder. Antipsychotic medica-tions have been widely used to manage behavioral and psychological symptoms of dementia (BPSD), however efficacy and safety of these agents are conflicting. In this study, we tried to overview the association of antipsychotic medication use and neuropsychi-atric symptoms with cognitive decline in patients with Alzheimer’s disease. @*Methods@#We reviewed the medical charts of patients who were diagnosed as major neurocognitive disorder due to Alzheimer’s disease from November 2014 to October 2015. We reviewed whether the subjects had used antipsychotics, and whether patients had neuropsychiatric symptoms. We used linear mixed models to examine the statistical difference between each group. @*Results@#Total of 106 subjects were included in the study. There was no statistically significant difference in cognitive function decline (Korean Version of Mini-Mental State Examination score change) between subjects with or without BPSD (p=0.62), and between subjects with or without antipsychotic medication (p=0.09). @*Conclusion@#There was no evidence that antipsychotic medication and BPSD are associated with more cognitive decline. Findings imply that neuropsychiatric symptoms and cognitive impairment come from different etiologic causes, which highlights the heterogeneity of the disorder. Clinician should decide whether to use antipsychotic medication while carefully considering the effect and side effects of antipsychotic medication throughout the treatment period.

The Characteristics of Students Who Had Attempted Self-Injury or Suicide in Chungcheongdo ‘Professional School Visits Outreach Project’ / 신경정신의학

OBJECTIVES: This study examined the characteristics of students who participated in the ‘Professional School Visits Outreach Project’ and evaluated the factors affecting self-injury or suicidal attempts.METHODS: In a cross-sectional study, psychiatrists or mental health professionals conducted a semi-structured interview with 296 students, families, and teachers in Chungcheong province and recorded the socioeconomic status (SES), past psychiatric history, current clinical symptoms, and mental status exams. Logistic regression analysis was performed on the variables with differences between the students who had attempted self-harm or suicide and those who had not.RESULTS: The subjects of this study belonged to a relatively low SES. In addition, their provisional diagnosis was mainly attention-deficit/hyperactivity disorder (38.5%) or depression (29.1%). Approximately 18.2% of students had attempted self-injury or suicide. The variables with differences between students who had attempted self-harm or suicide and those who had not, were female [odds ratio (OR) 2.878, p=0.002], provisional diagnosis of depression (OR 3.045, p=0.001), and a history of bullying victim (OR 1.927, p=0.048). Although the risks of self-injury or suicidal attempts were not increased by child abuse alone, it was increased in girls who experienced both childhood abuse and bullying victim (OR 4.222, p=0.002).CONCLUSION: The ‘Professional School Visits Outreach Project’ provides therapeutic opportunities for low SES and high-risk adolescents with multiple difficulties, such as child abuse, bullying victim, and suicidal behaviors. In addition, the recurrent experience of trauma in girls appears to increase the risk of adolescent self-injury or suicidal attempts.

Gender-based Multilevel Analysis of Influential Factors for Suicide Attempts among At-risk Non-referred Adolescents in Korea

Objective@#Effective suicide prevention for at-risk adolescents requires increased access to medical treatment. Investigating the unique characteristics of suicide in this vulnerable at-risk non-referred sample can contribute to establishing effective suicide prevention policies. This study aimed to (a) examine at-risk non-referred adolescents’ suicide attempt rate, (b) investigate influential multilevel factors in predicting these adolescents’ suicide attempts, and (c) compare the results of (a) and (b) by gender. @*Methods@#A total of 401 samples (216 boys and 185 girls) were recruited through a school-based mental health project for at-risk adolescents. Multivariate hierarchical logistic regression analyses were performed at the individual-, contextual-, and protective levels to evaluate three multilevel models as well as to investigate predictabilities for the overall group and by gender. @*Results@#The suicide attempt rate of the overall sample was 29.4% (boys: 18.1%, girls: 42.7%), which was significantly higher than that of community samples. For boys, individual-level predictors (depression and conduct problems) had the most significant contribution in predicting suicide attempts. In contrast, for girls, protective-level predictors (family satisfaction) contributed the most to the prediction of suicide attempts, followed by contextual-level predictors (academic grades). @*Conclusion@#This study is an important step in understanding the unique characteristics of at-risk non-referred adolescents who have not yet been considered in mental health policies. Improving medical accessibility will be the first step in establishing effective suicide prevention policies for these vulnerable samples.

Classification of Adolescent Suicide Based on Student Suicide Reports

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 Education, we evaluated the associations between suicide and variables related to mental disorders; dysfunctional family life; depression and anxiety; previous suicide attempts; deviant behaviors such as drinking and smoking; and school life characteristics, including attendance and discipline, problems within the past year, and incidents prior to suicide. In addition, reports of warning signs just before suicide were included in the analysis. The two-stage cluster analysis classified the students into three clusters: the silent type (cluster 1; 48.55%), in which no risk factors were observed; environmental-risk type (cluster 2: 24.28%), which featured a high frequency of broken households, deviant behaviors such as smoking/drinking and running away from home; and depressive type (cluster 3: 27.17%), which featured a high frequency of mental health problems such as depression, anxiety, and suicide attempts. Identifying the sub-types of adolescent suicide may help to inform tailored suicide prevention and intervention strategies in school.

The Impact of Referral to Mental Health Services on Suicide Death Risk in Adolescent Suicide Survivors

Objectives@#This study aims to examine the effect of adolescent suicide survivors’ experience on suicide death risk, and the effect of referral to mental health services (hereafter referral) in this regard. @*Methods@#This study used the data of 878 suicide-deceased and suicide-attempted adolescents aged 8–19 years, managed by the Suicide and School Mental Health Institute from 2016 to 2018. @*Results@#Regression analysis for main effects showed that although suicide experience had no direct effect on suicide death, non-referral status was associated with a greater risk of death by suicide. While the “non-suicide survivor with non-referral” and “suicide survivor with non-referral” groups showed 1.87 [adjusted odds ratio=1.87, 95% confidence interval (CI)=1.21–2.89] and 4.59 (adjusted odds ratio= 4.59, 95% CI=2.02–10.42) times higher odds of suicide death, respectively, the “suicide survivor with referral” group showed no difference compared to the “non-suicide survivor with referral” group. @*Conclusion@#From these findings, there is a need to strengthen referral to mental health services and apply complicated grief treatment to improve the mental health of adolescent suicide survivors.

Characteristics of First Visit Pediatric Patients with Suicidal Ideation and Behavior: An 8-Year Retrospective Chart Review

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 university hospitals in a metropolitan area in South Korea. Medical records of patients aged 6–18 years were retrospectively reviewed from January 2009 to December 2016. Patients were analyzed by classifying them into suicidal and non-suicidal groups based on their visit to the hospital for management of suicidal ideation or suicide attempt and other mental problems, respectively. @*Results@#There were differences in the year of visit, diagnosis, education level, and referral sources between patients in the suicidal and non-suicidal groups. Multiple regression analysis was conducted based on the sex, education level, referral by school, and diagnosis of depression in patients in the suicidal group, which revealed significant association. @*Conclusion@#Suicide-related problems were significantly associated with the sex, education level, referral by school, and a diagnosis of depression in the patients. A well-connected referral system would be necessary for professional mental health management of high-risk children and adolescents.

Differences in Characteristics/Complaints and Referral of Attention-Deficit/Hyperactivity Disorder Patients with and without Depression: Focus on Korean Children and Adolescents / 우울ㆍ조울병

Background@#Children and adolescents with attention-deficit/hyperactivity disorder (ADHD) and depression present with different clinical characteristics compared to those without other psychiatric comorbidities (i.e., ADHD alone). This study aimed to determine the differences in clinical characteristics, complaints, and referral routes between patients with ADHD with and without depression. @*Methods@#The study included 1,231 children and adolescents in Korea. The demographic characteristics, referral routes, and chief complaints were identified and analyzed using the subjects’ electronic medical records of their first outpatient visit. @*Results@#The mean age and proportion of female subjects with depression and ADHD (ADHD-D, n=120) were significantly higher than those of patients with ADHD alone (ADHD-O, n=1,111). Furthermore, referral requests by the caregiver (p=0.037) and patient (p=0.006) were significantly higher in the ADHD-D group. In contrast, referrals via schools (p=0.009) and other medical institutions (p<0.001) were significantly higher in the ADHD-O group. There were more complaints of depression, anxiety, mood dysregulation, suicidal ideation, and self-harm behaviors among the patients in the ADHD-D group. However, complaints of inattention were more common among the patients in the ADHD-O group compared to those in the ADHD-D group (p<0.001). @*Conclusion@#This study revealed several differences in the demographic characteristics, referral routes, and chief complaints of the patients and caregivers between patients with ADHD with and without coexisting depression. Further investigations using structured psychiatric diagnostic tools are warranted.

The Impact of Paliperidone Palmitate on Hospitalization in Patients with Schizophrenia: A Retrospective Mirror-image Study

OBJECTIVE: Whether long-acting injectable antipsychotics (LAI) are superior to oral antipsychotics remains a controversial question, and results vary depending on the study design. Our study was performed to compare outcomes of oral anti-psychotics and paliperidone palmitate (PP) in clinical practice by investigating the numbers of admissions and bed days. METHODS: We performed a retrospective observational mirror-image study at a single medical center, reviewing medical charts to obtain the clinical data. Forty-six patients with a diagnosis of schizophrenia or schizoaffective disorder who had received at least two doses of PP were included in the analysis. The Wilcoxon signed-rank test was used to compare the numbers of bed days and admissions 1 year before starting PP with those numbers at 1 year after. RESULTS: The mean number of admissions fell from 0.83 to 0.17 per patient (p < 0.0002), and the median fell from 1 to 0. The mean number of bed days decreased significantly, from 24.85 to 8.74 days (p < 0.006). The outcomes remained similar in sensitivity analyses set up with different mirror points. CONCLUSION: Our results indicate that initiating PP reduced the mean numbers of hospital admissions and bed days compared with prior oral medication. LAIs may thus be cost effective in practice; its use bringing about cost reductions greater than its purchase cost.

Influence of Area-Level Characteristics on the Suicide Rate in Korean Adolescents

OBJECTIVE: We aimed to investigate the influence of area-level factors on adolescent suicide and to determine which variables differ according to age and sex.METHODS: We selected variables that were available for collection through an online database from 2005 to 2015 in the Korean Statistical Information Service and the Korea Labor Institute. We used administrative districts of Korea in 2017 for geographical classification. We examined the relationships between regional suicide rates and area-level variables in male and female subjects aged 10–14 years and 15–19 years. In addition, we analyzed area-level variables in adolescents aged 15–19 years according to sex.RESULTS: Our findings indicated that several area-level variables affected adolescent suicide rates, varying according to age and sex. Economic problems were shown to be more associated with suicide in male adolescents than in female adolescents. On the other hand, social fragmentation and health services were shown to be more associated with suicide in females.CONCLUSION: Suicide in adolescents was attributable to area-level factors such as economic status, social fragmentation, and community health services. By identifying area-level variables affecting adolescent suicide rates, we will be able to contribute to implement mental health policies related to adolescent suicide.

The Risk Evaluation of Delirium in Elderly Patients with Lower Extremity Fractures

OBJECTIVE: Delirium is very common in orthopedic elderly patients and increase comorbidity and mortality rates. By controling the risk factors of delirium, prevention strategy can be effective and reduce negative outcomes. The purpose of this study was to explore the usefulness of delirium risk assessment with some simple collateral questionaires. METHODS: The subjects were 50 elderly patients (≥65 years old) who admitted to a department of orthopedic surgery for operations of lower extremity fractures. They were evaluated with Diagnostic and Statistical Manual of Mental Disorders, fifth edition, Confusion Assessment Method and Korean Dementia Screening Questionnaire (KDSQ) by psychiatrists. The demographic data, medical histories, and orthopedic chart were checked through medical records of patients. RESULTS: 27 subjects (54.0%) were diagnosed as delirium. There was a significant difference between delirium group and control group with all KDSQ scores. Depressive category of KDSQ score had the highest correlation (coefficient=0.399) and can be independent risk factor of delirium (p=0.045). CONCLUSION: Cognitive impairment and depressive symptoms have high correlation with delirium. We found that just a few questions of cognitive impairment and depressive symptoms by caregivers can evaluate the risk factors of delirium. The simple collateral questionaires can be useful tool for exploring delirium risk factors.

Risk Factors for Suicidal Ideation and Attempts in Adolescents

OBJECTIVE: Although suicide is a serious public health concern for adolescents, there is a lack of studies that explore its risk factors in the Republic of Korea. The present study aims to investigate risk factors associated with suicidal behaviors in Korean adolescents. METHODS: Participants consisted of 2258 middle and high school students who completed a series of questionnaires regarding suicide ideation or attempts, non-suicidal self-injuries, depression, impulsivity, drinking behaviors, and negative life events, including peer bullying. RESULTS: Among the participants, 8.3% of students reported suicide ideation, while 3.2% reported a history of a suicide attempt in the past 12 months. Depression, peer-victimization, internet-related delinquency, and positive attitudes toward suicide were associated with suicidal ideations and attempts. Adverse life events were also associated with suicide ideation, but not attempts, while not living with both parents and poor family relationships were associated with suicide attempts, but not ideations. Non-suicidal self-injuries were associated with both suicide ideations and attempts. Students with suicidal ideations and attempts can be differentiated depending on the presence of self-injury. CONCLUSION: In addition to depression or behavioral problems, non-suicidal self-injuries and lack of support from family may also play significant roles in suicide attempts in adolescents. To facilitate the prevention of suicide in adolescents, longitudinal studies should be followed to confirm the risk factors identified in this study.

A Comparative Study of Suicide Rates among 10–19-Year-Olds in 29 OECD Countries

OBJECTIVE: This study had two main objectives: to compare current suicide rates in OECD countries among 10–19-year-olds and to identify patterns of suicide rates based on age, gender and time. Furthermore we investigated the main dimensions that contributed to the variation in child and adolescent suicide rates across countries. METHODS: We combined the WHO mortality data and the population data released by OECD to calculate the suicide rates in 29 OECD countries. A self-organizing map (SOM), k-means clustering analysis, and multi-dimensional scaling were used to classify countries based on similarities in suicide rate structure and to identify the important dimensions accounting for differences among groups. RESULTS: We identified significant differences in suicide rates depending on age, sex, country, and time period. Late adolescence and male gender were universal risk factors for suicide, and we observed a general trend of declining suicide rates in OECD countries. The SOM analysis yielded eight types of countries. Most countries showed gender gaps in suicide rates of similar magnitudes; however, there were outliers in which the gender gap was particularly large or small. CONCLUSION: Significant variation exists with respect to suicide rates and their associated gender gaps in OECD countries.

Awareness of Students' Emotional and Behavioral Screening Test based on Parental and Teacher Ratings

OBJECTIVES: Since 2013, the Students' Emotional and Behavioral Screening Test (SEBT) has been conducted annually for 1st grade and 4th grade elementary school students, 1st year middle school students, and 1st year high school students. The SEBT has been considered to have effectiveness and strength for screening high risk students who have a strong possibility of harboring emotional or behavioral problems in school. Therefore, in this study, we conducted an investigation into the awareness of the SEBT based on the rating score of the parents and teachers to determine its future direction and management. METHODS: A total of 731 parents and 149 teachers participated in this study. Each participant completed a self-administered questionnaire on their awareness of the SEBT. RESULTS: 428 (58.5%) parents and 99 (66.4%) teachers rated their overall satisfaction at more than 4 points out of a total of 5 points. The test reliability was rated at more than 4 points out of a total of 5 points by 52.1% of the parents (n=381) and 47.7% of the teachers (n=71). CONCLUSION: Both parents and teachers consider the SEBT to be highly satisfactory and reliable.

Cross-Cultural Aspect of Behavior Assessment System for Children-2, Parent Rating Scale-Child: Standardization in Korean Children

PURPOSE: Our study aimed to examine psychometric properties and cross-cultural utility of the Behavior Assessment System for Children-2, Parent Rating Scale-Child (BASC-2 PRS-C) in Korean children. MATERIALS AND METHODS: Two study populations were recruited: a general population sample (n=2115) of 1st to 6th graders from 16 elementary schools and a clinical population (n=219) of 6–12 years old from 5 child psychiatric clinics and an epidemiological sample of autism spectrum disorder. We assessed the validity and reliability of the Korean version of BASC-2 PRS-C (K-BASC-2 PRS-C) and compared subscales with those used for US populations. RESULTS: Our results indicate that the K-BASC-2 PRS-C is a valuable instrument with reliability and validity for measuring developmental psychopathology that is comparable to those in Western population. However, there were some differences noted in the mean scores of BASC-2 PRS-C between Korean and US populations. CONCLUSION: K-BASC-2 PRS-C is an effective and useful instrument with psychometric properties that permits measurement of general developmental psychopathology. Observed Korean-US differences in patterns of parental reports of children's behaviors indicate the importance of the validation, standardization and cultural adaptation for tools assessing psychopathology especially when used in populations different from those for which the instrument was originally created.

The Relation of Blood Iron Level with Frontal Function in Children with Attention-Deficit/Hyperactivity Disorder / 신경정신의학

OBJECTIVES: Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder showing many neuropsychological deficits. Many environmental risk factors have been thought to increase the risk for the disorder. We examined blood iron levels in children with ADHD and a control group to find an association between iron deficit and diagnosis, neuropsychological characteristics and clinical features. METHODS: An ADHD group (n=50) and control group (n=45) of children 6-12 years of age were recruited. Both groups were diagnosed by semi-structured interview, and they were evaluated using the Korean version of the ADHD Rating Scale (K-ARS), Korean version of IOWA Conner's Rating Scale (K-IOWA), intelligence quotient (IQ), and neurocognitive function tests (continuous performance test, children's color trails test, Stroop color-word test). Iron levels in blood were determined using the inductively coupled plasma mass spectrometry instrument. Independent t-test and correlation were used to determine the relation of blood iron levels with symptom ratings and neurocognitive function. Logistic regression was performed to determine the diagnostic value of blood iron levels. RESULTS: Blood iron levels were significantly lower in ADHD than in control and showed negative correlation with K-ARS and K-IOWA scores. Blood iron levels showed positive association with IQ and Stroop color-word test results and negative association with results of continuous performance testing. Low blood iron levels predicted the diagnosis of ADHD. CONCLUSION: Lower levels of blood iron were associated with ADHD symptom severity, IQ, and frontal lobe-mediated neurocognitive function. As blood iron levels may influence ADHD, measurement of iron levels in blood may be useful for evaluation of symptoms and neurocognitive function in ADHD.

Effect of Korean High School Students' Mental Health on Academic Achievement and School Dropout Rate

OBJECTIVES: The purpose of this study was to explore the influence of high school students' mental health on their academic achievement and school dropout rate by using longitudinal data. METHODS: For this study, 153 high schools were randomly sampled on a nationwide scale. The descriptive data was collected from a school information internet site which is organized by the Korean Ministry of Education. We used the schools' mean scores on the Adolescent Mental Health Problem-Behavior Questionnaire-II (AMPQ-II) scale which was used for estimating students' mental health in the 2013 school-based mental health screening test. The data analysis was conducted by using hierarchical regression analysis. RESULTS: The results of this study showed that the AMPQ-II scale's mean scores have significant effects on the following year's academic achievement and annual dropout rates. Especially, the AMPQ-II scale's mean scores tend to increase the school dropout rate in vocational schools. CONCLUSION: The finding of this study is that Korean high school students' mental health states significantly influence their academic achievement and school dropout rate.