Personality Disorder Clusters Research Articles

French version of the Inventory of Personality Organization (IPO-fr): psychometric properties in young adults.

The Inventory of Personality Organization (IPO) is a self-assessment instrument designed to measure the level of personality organization. In the present study, we developed and validated a French version (IPO-fr) of this instrument in a population of young adults. Its validity was established on the basis of two studies examining (1) its internal structure, and (2) its convergent validity with the Personality Diagnostic Questionnaire-4+, the Positive and Negative Affect Schedule (PANAS), the Hospital Anxiety and Depression Scale (HADS), and the Aggression Questionnaire (AQ). In the first study, we assessed the reliability of the internal structure of the French form of the IPO (IPO-fr) in a nonclinical population. Our sample comprised 602 first- and second-year psychology students, with a mean age of 19.40 years (SD = 1.95). The second study assessed the convergent validity of the questionnaire in nonclinical samples, with regard to the three clusters (A, B, and C) of personality disorders, positive and negative affect, and aggression and depressive symptoms. The sample for this second study consisted of 305 first-, second- and third-year psychology students, with a mean age of 19.83 years (SD = 2.12). The French version of the IPO is shorter than the English: 40 items instead of 57. Its internal clarity and its discriminative capacity make it easier to interpret. This study has established the relevance of the IPO-fr as a reliable and brief instrument for assessing individual personality. It could make a major contribution to the screening of personality pathology in the French population and to the assessment of treatment programs.

PERSONALITY DISORDERS AND CRIME

As it is known, the prevalence of mental disorders in the penitentiary system is high. Among mental disorders, there are psychoses of different genesis, affective disorders, post-traumatic stress disorder, personality disorders, substance abuse, dual disorder, etc. The study within the prison system of the relationship between crime committed by an individual and mental disorders is a very interesting current problem. I think the study of personality disorders in prisons deserves special attention. The goal of this study was to examine personality disorders in prisoners placed in the psychiatric ward of the medical unit of the accused and convicted treatment facility. Of the 501 patients studied, the majority were men (448) and the minority were women (12) what is consistent with the statistics for the penitentiary system as a whole. Indicators such as age, place of permanent residence, and education were included in the survey and are presented in the corresponding tables. These tables show that the average age of the participants is young (39 years), most of them live in the regions (59.3%), and have secondary education (71.3%). According to the results of the study, 77% of the participants were diagnosed with emotionally unstable (borderline) personality disorder (F60.3), which is included in the B-cluster of personality disorders. This, on its turn, as the relevant literature shows, is consistent with the findings of other studies. However, the given studies show: B Cluster personality disorders give the following picture: antisocial personality disorder in men (47%); and borderline and antisocial personality disorder in women (25% and 21%, respectively).

Structural Brain Alterations in Borderline Personality Disorder

Borderline personality disorder (BPD) is one of three clusters of personality disorders characterized by a pattern of difficulty regulating emotion, impulse control, interpersonal relationships, and self-image. Emotional dysregulation, impulsive aggression, repetitive self-injury, and chronic suicidal tendencies make these individuals frequent users of mental health services. BPD has a variety of causes and involves several factors which interact in various ways with each other. Emotional dysregulation and impulsivity can be caused by genetic factors and traumatic childhood experiences and lead to dysfunctional behaviors, psychosocial conflicts, and deficits that may exacerbate emotional dysregulation and impulsivity. BPD has been linked to anatomical alterations in brain areas in the prefrontal cortex, cingulate cortex, hippocampus, amygdala, hypothalamus, corpus callosum, and frontolimbic network. These brain changes can lead to the manifestation of the inability to control behavior, feelings, and interpersonal relationships, which often leads to violence. These symptoms may begin at a young age or in early adulthood and tend to continue as the individual ages. The goal of this article is to review how structural changes in the brain can cause BPD. KEYWORDS Borderline personality disorder, MRI in BPD, BPD patients, personality disorders, structural imaging BPD, neurobiology BPD

Personality disorder and suicide risk among patients in the veterans affairs health system.

Among veterans in Veterans Health Administration (VHA) care, patients with mental health and substance use conditions experience elevated suicide rates. However, despite previously demonstrated high rates of suicidal behavior, little is known regarding suicide rates among veteran VHA users with personality disorders (PDs) as a whole, or by PD clusters (A: Eccentric; B: Dramatic; C: Fearful; and PD-not otherwise specified). PD prevalence and suicide rates were assessed through 2017; overall and by clusters for 5,517,024 veterans alive as of 12/31/2013 and with more than 2 VHA encounters in 2012-2013. In all, 46,050 (.83%) had a PD diagnosis in 2012-2013. Suicide risk was examined using proportional hazards regressions adjusted for age, sex, veteran status, clustering within a geographic region, and other mental health diagnoses. Patients with PDs had greater suicide risk than those without (156.5 vs. 46.7 per 100,000 person-years). Individuals in Cluster B, which includes borderline and antisocial PDs, were at the highest risk (178.5 per 100,000 person-years), followed by PD-not otherwise specified and Cluster C (152.6 and 121.4 per 100,000 person-years, respectively). Rates of PDs in the VHA system were lower than those usually found in community samples. Veterans with a PD diagnosis had an increased risk of suicide, which was especially elevated for those with Cluster B diagnoses. Study findings document the importance of enhancing diagnosis and treatment for veterans with PDs and targeted suicide prevention services. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Dispositional and ideological factor correlate of conspiracy thinking and beliefs.

This study explored how the Big Five personality traits, as well as measures of personality disorders, are related to two different measures of conspiracy theories (CTs)The two measures correlated r = .58 and were applied to examine generalisability of findings. We also measured participants (N = 397) general knowledge levels and ideology in the form of religious and political beliefs. Results show that the Big Five and ideology are related to CTs but these relationships are generally wiped out by the stronger effects of the personality disorder scales. Two personality disorder clusters (A and B) were significant correlates of both CT measures, in both cases accounting for similar amounts of variance (20%). The personality disorders most predictive of conspiracy theories were related to the A cluster, characterized by schizotypal symptoms such as oddities of thinking and loose associations. These findings were corroborated by an additional analysis using Latent Semantic Analysis (LSA). LSA demonstrated that the items measuring schizotypal and related symptoms are cognitively related to both our measures of CTs. The implications for the studying of CTs is discussed, and limitations are acknowledged.

A person-centered perspective on the combined DSM-5 AMPD/ICD-11 personality model: Utility, relationship with the categorical personality disorder model, and capacity to differentiate between levels of identity functioning.

Both the ICD-11 classification of Personality Disorders and the DSM-5 Alternative Model for Personality Disorders (DSM-5 AMPD) conceptualize personality pathology in a dimensional way, but differ in the way they carve up their respective pathological personality domains. Recently, a combination of ICD-11 and DSM-5 AMPD descriptive pathological personality traits, the Modified Personality Inventory for DSM-5-Brief Form Plus (PID5BF + M), was developed. We investigated the utility of the additional ANANKASTIA domain (not represented in the DSM-5 AMPD) as well as of the additional PSYCHOTICISM domain (not represented in the ICD-11 model) in the identification of meaningful pathological personality domain clusters based on the PID5BF + M. Next to the classical 2- and 3-cluster solutions, we examined whether the presence of the additional ANANKASTIA domain would also gave rise to a meaningful 4-cluster solution. We then validated these clusters by investigating differences between them in mean DSM-5 Section II cluster A, B, and C personality disorder scores. Finally, we investigated whether cluster membership was able to differentiate between levels of identity functioning, a key feature of personality disorder severity in both the ICD-11 model and the DSM-5 AMPD. We used a Flemish community sample of 242 participants, and applied k-means cluster analyses in a two-step manner on PID5BF + M domains to investigate 2-, 3-, and 4-cluster solutions. We used MANOVAs to examine differences between clusters in PID5BF + M domains, DSM-IV/DSM-5 Section II Assessment of Personality disorders (ADP-IV) cluster A, B, and C scores, and Self-Concept and Identity Measure (SCIM) scores. Cluster analyses on PID5BF + M pathological personality domains (1) revealed meaningful 2-, 3-, and 4-cluster solutions, with the 4-cluster solution explaining the most variance in the clustering variables, (2) allowed to identify a classical Overcontrolled cluster which DSM-5 AMPD PID-5 does not, and (3) demonstrated the utility of representing ANANKASTIA and DISINHIBITON as separate pathological personality domains. PID5BF + M clusters (5) were informative of DSM-5 Section II cluster A, B, and C personality disorder scores and (6) showed different levels of clinical-developmental Identity functioning. Current results demonstrate the utility of a combined ICD-11/DSM-5 AMPD view from a person-centered perspective.

Neutropenia induced by Valproic Acid: A case report

IntroductionValproic acid (VPA) is considered a well-tolerated antiepileptic drug used in Bipolar Disorder as a mood stabilizer. Nevertheless, VPA has been related to several adverse effects. Neutropenia is included as a potential adverse effect, although in clinical practice it is not often measured with regularity.ObjectivesTo report a case of a patient with Bipolar Disorder type 2 and Personality Disorder Cluster B treated with VPA with a neutropenia caused by VPA.MethodsA 61-year-old woman assists to the outpatient psychiatric unit in order to a pharmacological treatment adjustment. A blood test is performed showing a decrease in the levels of neutrophiles in comparison with previous tests. Psychiatric history is revised finding and association between the prescription of VPA and the reduction of neutrophile levels. When this drug was removed, neutrophile levels had increased again up to normal levels.ResultsDue to the relationship between neutropenia and VPA treatment, we decided to discontinue this drug. At the beginning the patient doesn’t agree with the withdrawal of VPA treatment due to its effectiveness in her mood stabilization. Psychoeducation sessions are performed in order to explain risk and benefits of potentials treatment alternatives versus maintaining the same prescription. Finally the patient accepts the switch of the mood stabilizer treatment to oxcarbazepine with a good tolerability and effectiveness.ConclusionsPeriodical blood test monitoring is needed in order to study adverse effects as neutropenia in patients with VPA treatment.DisclosureThe author has received support from Janssen-Cilag, Otsuka-Lundbeck, Italfármaco, Angelini Pharma and Casen Recordati; and declares no support related to the subject of this article.

Alliance rupture profiles by personality disorder pathology in psychotherapy for depression: Tendencies, development, and timing.

Clinical and theoretical considerations presume that patients with different personality disorder (PD) clusters will be associated with distinct alliance rupture profiles; however, there is scarce empirical literature examining this. The present study adopted a systematic framework for investigating profiles of alliance ruptures for individuals belonging to each of the three PD clusters. The sample consisted of 94 patients from a randomized controlled trial for treatment of depression. PD cluster features were assessed at intake and ruptures were assessed across treatment. Three sets of multilevel analyses were conducted to test differences between the PD clusters in the general tendency to show a rupture profile, rupture development throughout the treatment, and timing of predicting ruptures by PD within sessions. The three clusters were associated with distinct profiles of alliance ruptures. Clusters A and B were characterized by a general tendency to show more withdrawal and confrontation ruptures. Cluster A had a greater decrease in confrontation ruptures over the course of treatment, while cluster B had a greater decrease in withdrawal ruptures. Cluster C was characterized by a general tendency to show fewer withdrawal and confrontation ruptures, with a greater increase in both ruptures over the course of treatment. For withdrawal ruptures, the differences between clusters were evident from the beginning of sessions, whereas for confrontation ruptures, there was less of a difference between beginning and end of sessions. The distinct profiles of alliance ruptures for each PD cluster may contribute to progress towards tailoring treatment to individuals with PDs.

Understanding perceived social support among women with personality disorder clusters.

This study aimed to understand perceived social support (PSS) among women with personality disorder (PD). We also investigated potential differences in PSS according to PD clusters (clusters A, B, C). Women (n = 718) from the Geelong Osteoporosis Study completed the Multidimensional Scale of Perceived Social Support (MPSS) and Structured Clinical Interview for DSM-IV Axis II Disorders. Multivariable regression and analyses of covariance were employed, controlling for psychiatric and sociodemographic confounders. After age-adjustment, PD (any) and the PD clusters were negatively associated with PSS across all subscales. Bonferroni-adjusted pairwise comparisons revealed lower: significant other PSS for cluster A; family PSS for cluster C, friend PSS for clusters B and C; and total PSS for clusters B and C. Aspects of PSS were predominantly lower among women with cluster B and C PDs.

Differences in Psychiatric Comorbidities and Gender Distribution among Three Clusters of Personality Disorders: A Nationwide Population-Based Study.

Personality disorders (PDs) are grouped into clusters A, B, and C. However, whether the three clusters of PDs have differences in comorbid mental disorders or gender distribution is still lacking sufficient evidence. We aim to investigate the distribution pattern across the three clusters of PDs with a population-based cohort study. This study used the Taiwan national database between 1995 and 2013 to examine the data of patients with cluster A PDs, cluster B PDs, or cluster C PDs. We compared the differences of psychiatric comorbidities classified in the Diagnostic and Statistical Manual of Mental Disorders, fifth edition across the three clusters of PDs. Moreover, we formed gender subgroups of the three PDs to observe the discrepancy between male and female. Among the 9845 patients, those with cluster A PDs had the highest proportion of neurodevelopmental disorders, schizophrenia and neurocognitive disorders, those with cluster B PDs demonstrated the largest percentage of bipolar disorders, trauma and stressor disorders, feeding and eating disorders, and substance and addictive disorders, and those with cluster C PDs had the greatest proportion of depressive disorders, anxiety disorders, obsessive–compulsive disorders, somatic symptom disorders, and sleep–wake disorders. The gender subgroups revealed significant male predominance in neurodevelopmental disorders and female predominance in sleep–wake disorders across all three clusters of PDs. Our findings support that some psychiatric comorbidities are more prevalent in specified cluster PDs and that gender differences exist across the three clusters of PDs. These results are an important reference for clinicians who are developing services that target real-world patients with PDs.

Do you have to be mad to believe in conspiracy theories? Personality disorders and conspiracy theories.

This study explored the relationship between belief in conspiracy theories and the personality disorders. A sample of 475 British adults, aged around 30 years, completed measures of Belief in Conspiracy Theories (CTs) and the Personality Disorders (PDs), as well as the SAPAS, a short intelligence test and two self-evaluations. Belief in CTs was correlated with nearly all PDs, as well as the three established higher order clusters (A: odd and eccentric; B: dramatic and emotional; C: anxious). A series of stepwise multiple regressions were computed. A final regression showed five of the variables (education, intelligence, Cluster A, B, and C) were significant, which indicated that less well-educated and less intelligent participants, scoring higher on two PD clusters (Cluster A and B) but lower on Cluster C, believed more in the CTs. Implications of the study for understanding the origin of CTs is discussed. Limitations of the study, particularly the sample and measures used, are acknowledged.

The Mediator Effect of Personality on the Relationship Between Symptomatic Impairment and Treatment Outcome in Eating Disorders.

Features of personality disorders (PDs) have been found to explain meaningful variance in the onset, maintenance, and symptomatic presentation of eating disorders (EDs), and a co-occurent personality pathology is commonly associated with poorer response to ED treatment. The “pathoplasty model” of the relationship between personality and EDs implies that, once both conditions are established, they are likely to interact in ways that modify therapy outcome; however, to date, no studies have explored overall personality functioning, and especially PD clusters, as a mediator of treatment outcome. The present study aimed at conjointly exploring the associations between personality functioning and PDs, respectively, with pre-treatment ED symptomatic impairment and therapy outcome; and the mediating role of personality variables. At treatment onset, a sample of 107 women with ED problems were evaluated using both the Structured Clinical Interview for DSM-5 (SCID-5-CV) and the Shedler-Westen Assessment Procedure-200 (SWAP-200)—a clinician-rated procedure to dimensionally assess personality. Participants were also asked to complete self-report questionnaires on overall ED symptomatology, symptoms of binge eating and purging behaviors, and therapy outcome. The findings showed that, over and above the categorical ED diagnosis, the SWAP-200 healthy personality functioning score mediated the relationship between baseline ED symptom severity and therapy outcome, as well as the association between baseline bulimic symptoms and treatment outcome; furthermore, SWAP-200 Cluster B PD scores mediated the link between baseline binge eating and purging symptoms and therapy outcome, whereas scores in Clusters A and C showed no significant effects. The findings suggest that personality-based outcome research may improve treatment effectiveness in this difficult-to-treat population.

Alcohol use patterns and disorders among individuals with personality disorders in the Sao Paulo Metropolitan Area.

IntroductionAlcohol Use Disorders are frequently comorbid with personality disorders. However, the heterogeneity of the prevalence estimates is high, and most data come from high income countries. Our aim is to estimate the prevalence and association between alcohol use outcomes and the three DSM-5 clusters of personality disorders in a representative sample of the São Paulo Metropolitan Area.Materials and methodsA representative household sample of 2,942 adults was interviewed using the WHO Composite International Diagnostic Interview and the International Personality Disorder Examination Screening Questionnaire. Lifetime PD diagnoses were multiply imputed, and AUD diagnoses were obtained using DSM-5 criteria. We conducted cross-tabulations and logistic regression to estimate the associations between AUDs and PDs.Results and discussionOur study did not find significant associations of PDs with heavy drinking patterns or mild AUD. Cluster B PD respondents tended to show the highest conditional prevalence estimates of most alcohol use patterns and AUD, including its severity subtypes. When alcohol outcomes were regressed on all PD Clusters simultaneously, with adjustment for sex and age, only cluster B was significantly associated with past-year alcohol use (OR 3.0), regular drinking (OR 3.2), and AUDs (OR 8.5), especially moderate and severe cases of alcohol use disorders (OR 9.7 and 16.6, respectively). These associations between Cluster B PDs and these alcohol outcomes were shown to be independent of other PD Clusters and individuals´ sex and age.ConclusionThe main finding of our study is that AUDs are highly comorbid with PDs. The presence of Cluster B PDs significantly increases the odds of alcohol consumption and disorders and of more severe forms of AUDs. Considering the local context of poor treatment provision, more specific prevention and intervention strategies should be directed to this population.

Personality Disorder and Physical Health Comorbidities: A Link With Bone Health?

We examined whether personality disorders (PDs) (any, cluster A/B/C) were associated with bone mineral density (BMD) in a population-based sample of Australian women (n = 696). Personality and mood disorders were assessed using semi-structured diagnostic interviews. BMD was measured at the spine, hip, and total body using dual-energy x-ray absorptiometry (GE-Lunar Prodigy). Anthropometrics, medication use, physical conditions, and lifestyle factors were documented. The association between PDs (any, cluster A/B/C) and BMD (spine/hip/total body) was examined with multiple linear regression models. The best models were identified by backward elimination including age, weight, physical activity, smoking status, alcohol consumption, dietary calcium intake, mood disorders, physical multimorbidity, socioeconomic status, and medications affecting bone. The variables were retained in the model if p < 0.05. All potential interactions in final models were tested. Those with cluster A PD, compared to those without, had 6.7% lower hip BMD [age, weight adjusted mean 0.853 (95% CI 0.803–0.903) vs. 0.910 (95% CI 0.901–0.919) g/cm2, p = 0.027] and 3.4% lower total body BMD [age, weight, smoking, alcohol, calcium adjusted mean 1.102 (95% CI 1.064–1.140) vs. 1.139 (95% CI 1.128–1.150) g/cm2, p = 0.056]. No associations were observed between cluster B/C PDs and hip/total body BMD or between any of the PD clusters and spine BMD. To our knowledge, this study is the first to investigate the bone health of women with PD in a population-based sample. Given the paucity of literature, replication and longitudinal research including the examination of underlying mechanisms and sex differences are warranted.

Impact of adolescent complex regional pain syndrome on the psychopathology of young men ahead of military service: a retrospective cohort analysis of Korean conscription data

BackgroundThe relationship between physical and psychopathological features in complex regional pain syndrome (CRPS) has been a subject of constant interest, but no data are available in adolescents. Therefore, we aimed to identify the factors associated with psychopathology in adolescents with CRPS ahead of military service.MethodsWe retrospectively reviewed all conscription examinees who had completed a Military Personality Inventory (MPI) during a period between February 2013 and December 2016. A total of 63 persons with a history of CRPS (19-years of age for all) were enrolled. Basic demographic and pain-related data were analyzed to examine their association with MPI results. The mean FGR score as well as the 8 subdomain scores were compared between those with pain duration at < 15 months (n = 30) versus ≥15 months (n = 33). Binary MPI results (normal-abnormal) were also compared between the two groups.ResultsIn multivariate analysis, abnormal MPI was associated with pain duration, with an odds ratio (OR) at 1.05 for every 1-month increase (95% confidence interval (CI) 1.02–1.08; P = 0.002). Subjects with pain duration at ≥15 months have lower faking good response score (P < 0.001 vs. those with pain duration at < 15 months), and higher abnormal MPI result rate, faking bad response, inconsistency, anxiety, depression, somatization, paranoid, personality disorder cluster A, and personality disorder cluster B scores (P < 0.05). Pain duration was significantly associated with the MPI variables.ConclusionsPain duration is associated with psychopathology in adolescents with CRPS. Psychopathologic features increased as the disease duration increased. A comprehensive understanding of time-dependent psychopathological factors could support the planning of multimodal approaches for managing adolescent CRPS.

Analysis of personality disorder profiles obtained by five-factor personality model

Background/Aim. In spite of the growing body of evidence in the field of personality disorders, these disorders still retain the lowest diagnostic reliability of any major category of mental disorders. The aim of this study was to investigate the differences of personality profiles in patients diagnosed with personality disorder in comparison with the group of healthy control subjects, as well as to establish to what extent the five-factor personality model domains determine the specific clusters of personality disorders. Methods. The study group comprised 97 patients diagnosed as personality disorders (according to the Diagnostic and Statistical Manual of Mental Disorders ? DSM-IV criteria), aged between 18 and 65 years [mean = 35.78 years, standard deviation (SD) = 13.72 years], 67% were female. Control group included 58 healthy subjects (student population) aged between 20 to 35 years (mean = 22.48 years, SD = 2.56 years), 56% were female. The assessment was carried out by the new version of the NEO Personality Inventory-Revised (NEO-PIR), form S, and the Structured Clinical Interview (SCID II) for DSM-IV disorders. Results. The three clusters were found by the use of regression analysis: cluster A ? eccentrics (low scores in agreeableness), cluster B ? dramatics (high score in extroversion, low score in agreeableness, and cluster C ? anxious (low score in extroversion). The findings showed that the high level of neuroticism was a non-specific predictor of all three clusters, while dimension openness to experience had no predictive power for any of the three clusters. Conclusion. Our findings support the meta-analysis which suggests consistently high level of neuroticism and low level of agreeableness in most personality disorders. The study showed that it is possible to conceptualize personality disorders by using five-factor personality model of normal personality. Integrating the psychiatric classification with the dimensional model of general personality structure could enable the uncovering of essential parameters for setting the diagnosis.

Perceived Caretaker Malevolence During Childhood Reported by Borderline Patients and Personality-Disordered Comparison Subjects: Description and Prediction.

This study has two purposes. The first is to assess the rates of childhood malevolence by caretakers reported by a well-defined sample of inpatients with borderline personality disorder (BPD) and comparison subjects with other personality disorders. The second purpose is to determine the relationship between reported malevolence of caretakers and possible risk factors for this experience. Two reliable interviews were administered to 290 borderline inpatients and 72 personality-disordered comparison subjects to address these aims. Malevolence was reported by a significantly higher percentage of borderline patients than comparison subjects (58% vs. 33%). In multivariate analyses, severity of other forms of abuse, severity of neglect, and a family history of a dramatic cluster personality disorder were found to significantly predict perceived malevolence. Taken together, the results of this study suggest that experiencing malevolence is common and distinguishing for BPD, and that the risk factors for reported childhood malevolence are multifactorial in nature.

СОЦІАЛЬНО-ПСИХОЛОГІЧНА СПЕЦИФІКА ТРИВОЖНИХ ТА ДЕПРЕСИВНИХ КЛАСТЕРІВ АФЕКТИВНИХ РОЗЛАДІВ У ОСІБ ЗРІЛОГО ВІКУ

У статті проведено структурно-рівневий аналіз соціально-психологічних чинників афективних розладів осіб зрілого віку в кризові періоди життя та здійснено їх диференціацію на макро-, мезо- та мікрорівнях; розкрито особливості організації та методи дослідно-експериментальної роботи щодо визначення соціально-психологічних особливостей тривожних та депресивних кластерів афективних розладів особистості зрілого віку в кризові періоди життя; наведено її результати та проведено їх узагальнення.

Dimensional Pathological Personality Predicting Personality Disorders: Comparison of the DAPP-BQ and PID-5 Shortened Versions in a Spanish Community Sample

This study explored the psychometric properties of the shortened forms of The Dimensional Assessment of Personality Pathology (DAPP-BQ) and The Personality Inventory for DSM-5 (PID-5) in a large cohort from a Spanish community and compared simultaneously the predictive power with regard to personality disorders (PDs) scores in the International Personality Disorder Examination (IPDE). The IPDE is a self-report inventory of 77 items. Each item measures a criterion and a dimensional score can be obtained for each personality disorder. Both shortened forms (named DAPP-90 and PID-5/SF, respectively) obtained a good structural validity and reliability. Linear regression analysis showed that both questionnaires were predictive of the PDs scores. DAPP-90 factors explained about 25% of PDs variance (37% of the PDs clusters). Facets slightly increased the percentages accounting for PDs variance and clusters to 31% and 43%, respectively. PID-5/SF factors, meanwhile, explained 23% of PDs and 33% of PDs clusters, while the facets accounted for 25% of PDs and 37% of clusters. It is concluded that both questionnaires were good instruments for measuring pathological personality, and predicted a similar part of the variance in PDs. However, given that neither the DAPP-90 nor the PID-5/SF accounted for all the variation in PDs, categorical classification of the broader set of PDs may continue to be desired by some researchers and practicing clinicians.

Psychopathological Influence of Middle Fossa Arachnoid Cysts in Young Men: Analysis of Korean Conscription Data

A few reported studies have documented psychotic syndromes secondary to a middle fossa arachnoid cyst (AC). However, the association between middle fossa ACs and psychopathological symptoms remains to be determined. The present study investigated the psychopathological effects of middle fossa ACs in young men. We reviewed military personal inventory test profiles and baseline demographic data of 19-year-old conscription examinees from February 2013 to December 2016. In total, 132 examinees with middle fossa ACs and 350 examinees with normal findings were enrolled in the present study. Two separate comparisons were performed. First, we compared the middle fossa AC group with the control group. Second, the middle fossa AC group was divided into 2 groups according to cyst size and compared with the control group. Faking bad response behavior, infrequency, inconsistency, depression, schizophrenia, paranoia, and personality disorder cluster A scales were significantly associated with the presence of a middle fossa AC. Abnormal responses to the military personal inventory were significantly and positively correlated with cyst size. The prediction rate to show abnormal psychological results with the presence of an AC was estimated to be 60.7%-68.8%. The presence of ACs and cyst size were associated with psychopathology in this select group of young men. The size-dependent psychopathological effects of ACs appear to result from a local mass effect on the brain.