Temperament and character dimensions in male patients with substance use disorders: Differences relating to psychiatric comorbidity

Psychiatric comorbidities and concurrent substance use among people who inject drugs: a single-centre hospital-based study

The management of people who inject drugs (PWID) is compounded by the presence of psychiatric comorbidities leading to frequent relapses and poor treatment outcomes. Early identification and treatment of psychiatric comorbidities should be included in the management to enhance treatment outcomes. The objective of this study was to estimate the prevalence of psychiatric comorbidities and concurrent substance use among opioid injectors. This hospital-based, cross-sectional study was conducted from March 2021 to August 2022. This study included opioid injectors of all ages and both sexes. The Mini International Neuropsychiatric Interview-7 (MINI-7) and WHO-ASSIST were used to determine psychiatric comorbidities and concurrent substance use, respectively. Both crude and adjusted odds ratios were calculated to assess associations among demographic variables, concurrent substance use and psychiatric comorbidities. Among the 328 opioid injectors, the overall prevalence of psychiatric comorbidities was 88.1%, with the majority (68.6%) having more than one comorbidity. The most common psychiatric comorbidities were panic disorder (41.2%), social anxiety disorder (40.5%), and antisocial personality disorder (39.3%). Concurrent use of alcoholic beverages doubled the risk of ASPD (odds ratio 2.14 (1.24-3.72)). Cocaine (odds ratio 2.36 (1.10-5.03)) and amphetamines (odds ratio 7.68 (2.21-26.65)) increased the risk of OCD. Daily heroin injections were negatively associated (odds ratio 0.18 (0.03-0.94)) with psychotic disorders. Younger age (adjusted odds ratio 0.20 (0.79-0.53)) and never married status (adjusted odds ratio 2.62 (1.06-6.47)) were the only significant variables in the regression analysis. In conclusion, opioid injectors had a higher prevalence of numerous psychiatric comorbidities. The most common comorbidity was anxiety disorders. Concurrent use of tobacco, cannabis, cocaine, inhalants, etc., greatly increased the risk of psychiatric comorbidities.

Protocol for Characterization of Addiction and Dual Disorders: Effectiveness of Coadjuvant Chronotherapy in Patients with Partial Response

This protocol aims to characterize patients with dual disorders (DD; comorbid major depression and schizophrenia) compared with patients with only a diagnosis of substance use disorder (SUD) and those with only a diagnosis of severe mental illness (SMI; major depression and schizophrenia), evaluating clinical and personality characteristics, circadian rhythmic functioning, genetic polymorphism and neuropsychological performance in order to obtain a clinical endophenotype of differential vulnerability for these diagnostic entities. Patients will be divided into three groups: DD (45 men with comorbid schizophrenia, 45 men and 30 women with major depression), SUD (n = 90, with a minimum of 30 women) and SMI males (45 with schizophrenia, 45 with major depression). All patients will be under treatment, with at least three months of SUD abstinence and/or with SMI in remission or with stabilized symptoms. Outpatients of both sexes with insufficient restoration of circadian rhythmicity with SUD (n = 30) and dual depression (n = 30) will be asked to participate in a second two-month study, being alternately assigned to the condition of the chronobiological adjuvant approach to the treatment of regular hour habits and exposure to light or to the usual treatment (control). The effect of the intervention and patient compliance will be monitored with a Kronowise KW6® ambulatory device during the first two weeks of treatment and again at weeks 4 and 8 weeks. After completing the evaluation, follow-up of the clinical evolution will be carried out at 3, 6 and 12 months. This project will allow us to analyze the functional impact of DD comorbidity and to develop the first study of chronobiological therapy in the treatment of SUD and dual depression, with results transferable to the clinical setting with cost-effective recommendations for a personalized approach.

Community Rehabilitation and Hospitalizations Among People With Chronic Psychotic Disorder: Is There a Differential Association by Co-occurring Substance Use Disorder?

Objective: Co-occurrence of chronic psychotic disorders and substance use disorder (SUD) is clinically challenging and increasingly prevalent. In 2000, legislation was passed in Israel to foster rehabilitation and integration in the community of persons with mental health disorders. In 2010, the need to allocate resources for patients with these co-occurring disorders (COD) was officially recognized. Yet, most rehabilitation services were not specifically designed for COD. This study examines the relationship between duration of community rehabilitation and number of psychiatric hospitalization days among persons with/without COD in Israel. Methods: Data from the National Psychiatric Case Register on 18,684 adults with schizophrenia/schizoaffective disorders hospitalized in 1963-2016, was merged with data from the Israel Mental Rehabilitation Register. Associations and interactions between COD-status (COD/non-COD), time-period (Period₁: 2001-2009, Period₂: 2010-2016), duration of housing or vocational rehabilitation on hospitalization days per year were analyzed using repeated-measures ANOVA. Results: The proportion of non-COD chronic psychotic patients who received rehabilitation services increased from 56% in Period₁ to 63% in Period₂, as it did among COD patients-from 30 to 35%. The proportion of non-COD patients who received longer-duration vocational rehabilitation (≥1 year) was significantly higher (43%) than among COD patients (28%) in both time periods. For housing rehabilitation, these proportions were 79 and 68%, respectively. Persons with COD experienced more hospitalization days annually than non-COD patients. Duration of rehabilitation (less/more than a year) was inversely associated with annual number of hospitalization days (p < 0.0001). This pattern was noted in both COD and non-COD groups and remained significant after controlling for age, sex, COD group, percent of hospitalizations with SUD, and age at first hospitalization. Conclusions: COD patients with prolonged rehabilitation seemingly achieve long-term clinical improvement similar to non-COD patients, despite most rehabilitation settings in Israel not being designed for COD patients. Yet, COD patients receive overall less rehabilitation services and for shorter periods than non-COD patients. Long-term rehabilitation services should be provided to COD patients, who may need more time to commit to treatment. To achieve better long-term mental health improvements, a continued expansion of community-based integrative treatment and rehabilitation services for COD patients is needed in Israel.

Differential Effect of Community Rehabilitation Reform on Hospitalizations of Patients with Chronic Psychotic Disorders With and Without Substance Use Disorder, Israel, 1991-2016

The co-occurrence of schizophrenia and substance use disorder (SUD) is clinically challenging and increasingly prevalent. This study compares trends in hospitalization characteristics of chronic psychotic patients with and without SUD in Israel, before and after introduction of the Community Rehabilitation of Persons with Mental Disability Law in 2000. The National Psychiatric Case Registry provided data on 18,684 adults with schizophrenia/schizoaffective disorders, hospitalized in 1991-2016 (at least once in 2010-2015). Repeated-measures ANOVA was used to measure the effect (and interactions) of group (patients with and without co-occurring disorders (COD)), time-period (Period₁: 1991-2000, Period₂: 2001-2009, Period₃: 2010-2016) and age, on hospitalization measures-average length of stay (LOS), annual number of hospitalizations and hospitalization days. Among non-COD patients hospitalized in all three periods, LOS declined by half from 133.3 days in Period₁ to 63.2 in Period₃, and the annual number of hospitalizations increased slightly from 0.45 to 0.56. Among COD patients, LOS declined moderately from 82.7 days to 58.3 days, while annual hospitalizations increased dramatically from 0.56 to 0.82. The annual average number of hospitalization days/capita declined from 49.7 in Period₁ to 26.3 in Period₃ among non-COD patients, yet remained virtually unchanged among COD patients-39.6 and 37.4 in the two periods, respectively. Since introduction of the law, a significant improvement in hospitalization characteristics of chronic psychotic non-COD patients has been noted, whereas the situation worsened somewhat for COD patients. Community rehabilitation services for COD patients in Israel have yet to develop as a suitable alternative to hospitalization, and additional rehabilitation services are urgently needed.

Temperament and Character Profile and Its Clinical Correlates in Male Patients with Dual Schizophrenia

Personality traits are relevant in understanding substance use disorders (SUD) and schizophrenia (SZ), but few works have also included patients with dual schizophrenia (SZ+) and personality traits. We explored personality profile in a sample of 165 male patients under treatment, using the Temperament and Character Inventory-Revised. The participants were assigned to three groups of 55 patients each, according to previous diagnosis: SUD, SZ- and SZ+ (without/with SUD). We analyzed their clinical characteristics, relating them to personality dimensions. The SUD and SZ+ groups scored higher than SZ- in Novelty/Sensation Seeking. SZ- and SZ+ presented higher Harm Avoidance and lower Persistence than the SUD group. SZ+ patients showed the lowest levels of Self-directedness, while SZ- and SZ+ had higher scores in Self-transcendence than the SUD group. Several clinical characteristics were associated with personality dimensions depending on diagnosis, and remarkably so for psychiatric symptoms in the SZ- and SZ+ groups. The three groups had a maladaptive personality profile compared to general population. Our results point to different profiles for SUD versus SZ, while both profiles appear combined in the SZ+ group, with extreme scores in some traits. Thus, considering personality endophenotypes in SZ+ could help in designing individualized interventions for this group.

Measuring Personality Problems in Patients With Substance Use Disorders: A Cross-Sample Validation

Objective: Co-occurrence of substance use disorder and personality disorder (PD) is associated with greater functional impairment and mutual deterioration of the prognosis. More information is needed about the extent of personality problems in substance use disorder patients and when these problems can be assessed in a reliable way. The aim of this study was to compare the levels and scale reliability of (mal)adaptive personality functioning in four different samples and to discuss the possible clinical implications. Methods: Personality problems were assessed using the self-report Severity Indices of Personality Problems (SIPP) questionnaire in four samples: (a) 136 patients in the detoxification phase, (b) 187 patients with substance use disorder in long-term inpatient treatment, (c) 1,399 patients with PD in day and outpatient treatment, and (d) a community population of 935 respondents. Scale reliability of the SIPP facets was computed for each sample and levels of personality problems were compared among samples. Results: The scale reliability was acceptable for most of the SIPP facets in both substance use disorder samples. The substance use disorder samples had scores on SIPP that reflected greater personality dysfunction compared with the general community population and at a level similar to the PD population. Conclusions: SIPP appears to be a promising instrument for assessing personality pathology in substance use disorder treatment. The finding of high levels of maladaptive personality functioning in substance use disorder populations challenges the clinical management of the substance use disorder patient group and supports the development of integrated treatment approaches.

Personality Profile and Clinical Correlates of Patients With Substance Use Disorder With and Without Comorbid Depression Under Treatment

Background: Among patients with substance use disorder (SUD), major depressive disorder (MDD) is highly prevalent. Even though, personality plays an important role in treatment outcomes for individuals with SUD and SUD + MDD, few studies have explored personality characteristics in these samples. This study aims to describe personality for patients with SUD taking into account the comorbid MDD, using the Alternative Five Factor Model (AFFM). We also aim to compare SUD + MDD patients with population norms and to elucidate possible personality clinical correlates. Methods: For our study, 116 male patients undergoing for SUD treatment were divided in two groups: SUD only (N = 58) and SUD + MDD (N = 58). To examine personality, we used the Zuckerman-Kuhlman Personality Questionnaire and multiple analyses of covariance were performed to identify differences. In a first analysis, age was introduced as a covariate whereas in a second analysis the continuous variables that showed to have a discriminant value for the groups were added as covariates. Variables predicting the presence of dual diagnosis and personality clinical correlates were analyzed by logistic and linear regression models, respectively. We observed that patients with SUD + MDD show distinctive personality characteristics compared with patients with SUD only and population norms. Results: According to the AFFM, SUD + MDD patients are characterized by higher Neuroticism-Anxiety (positively associated to depressive symptoms) and Impulsivity; and by lower Parties and Friends. Moreover, the probability of having a dual depressive disorder was represented by the amount of medications and substances used. The preference for hard work and the energy self-reported levels (Work Activity trait) are linked to these clinical variables rather than to the presence/absence of a dual depressive disorder. Conclusions: Even when controlling clinical variables related to a higher probability of having a dual depressive disorder, the Neuroticism-Anxiety is a personality trait that strongly differentiates between SUD only and SUD + MDD patients. Further investigation is needed to explore the role of this personality trait as endophenotype in dual depressive men. Our results underline the importance of a dimensional understanding of personality and its clinical correlates among patients with SUD + MDD; this approach could provide us information on specific treatment strategies to improve the prognosis of patients.

Temperament and character profile of college students who have suicidal ideas or have attempted suicide

OBJECTIVE

Suicide is a major cause of death in university students. Personality traits have been suggested as possible risk factors for suicidal behaviors. This study looked at the relationship between the personality dimensions of the Temperament and Character Inventory (TCI) and suicidal behaviors.

METHOD

A total of 5644 college students took the TCI test and the suicidality module of the M.I.N.I. The students were divided into the suicidal ideation group (n = 302; 5.4%) and the suicide attempt group (n = 301; 5.3%). Each group's TCI dimension and sub-dimension scores were compared with one another. To find out which TCI dimension affects suicide risk when depressed, regression analysis and mediation analysis were conducted.

RESULTS

First, we adjusted for age, sex and depressive mood and compared the TCI scores of the participants based on their suicide risk. After the adjustment, self-directedness decreased in the suicidal ideation group while novelty seeking and persistence increased in the suicide attempt group. It turned out that self-directedness has a partial mediating effect between depressive symptom and suicide risk (β = -0.068 P < 0.001).

CONCLUSION

We adjusted for depressive mood and it turned out that the suicidal ideation group is affected by character whereas the suicide attempt group is affected by temperament. Among the character dimensions, self-directedness was found to reduce the effect of depressive mood on suicide risk. Therefore, when evaluating suicide risk, assessing character dimensions, especially self-directedness along with depressive mood, a risk factor, will be helpful.

Relationship between chronotype and temperament/character among university students

Chronotype is largely classified as being morning or evening types according to preference for daily activity and the preferred bedtime. This study examined the relationship between chronotype and temperament/character dimensions among university students. A total of 2857 participants completed the 140-item Temperament and Character Inventory-Revised Short version (TCI-RS) from a 5-score scale as well as the 13-item composite scale for morningness-eveningness (CSM). In this study, we classified chronotype as "morning," "neither," or "evening" types according to CSM scores and compared the scores in terms of 4 temperament dimensions and 3 character dimensions. The evening type showed high values for novelty seeking and harm avoidance, whereas the morning type had high scores for persistence, self-directedness, and cooperativeness. A logistic regression analysis after controlling for age and gender showed that chronotype significantly associated with persistence and novelty seeking. The results of this study suggest that chronotype is different according to gender and age and in addition, chronotype closely correlates with temperament and character. Among these, eveningness was associated with high novelty seeking, whereas morningness was associated with high persistence. Further studies are required to investigate the relationship between chronotype and temperament/character dimensions in a wider age bracket.

Treatment with the Self-Discovery Camp (SDiC) improves Internet gaming disorder

INTRODUCTION

Internet gaming disorder (IGD) is a novel behavioral addiction that influences the physical, mental, and social aspects of health due to excessive Internet gaming. One type of intensive treatment for IGD is the therapeutic residential camp (TRC), which comprises many types of therapies, including psychotherapy, psychoeducational therapy, and cognitive behavioral therapy. The TRC was developed in South Korea and has been administered to many patients with IGD; however, its efficacy in other countries remains unknown. We investigated the efficacy of the Self-Discovery Camp (SDiC), a Japanese version of a TRC, and the correlations between individual characteristics and outcome measures.

METHODS

We recruited 10 patients with IGD (all male, mean age=16.2years, diagnosed using the DSM-5) to spend 8 nights and 9days at the SDiC. We measured gaming time as well as self-efficacy (using the Stages of Change Readiness and Treatment Eagerness Scale, a measure of therapeutic motivation and problem recognition).

RESULTS

Total gaming time was significantly lower 3months after the SDiC. Problem recognition and self-efficacy towards positive change also improved. Furthermore, there was a correlation between age of onset and problem recognition score.

CONCLUSIONS

Our results demonstrate the effectiveness of the SDiC for IGD, especially regarding gaming time and self-efficacy. Additionally, age of onset may be a useful predictor of IGD prognosis. Further studies with larger sample sizes and control groups, and that target long-term outcomes, are needed to extend our understanding of SDiC efficacy.

Temperament and character profiles associated with depression and treatment response in patients with or without comorbid substance abuse

There is limited knowledge on the relationship between temperament and character profiles and substance abuse comorbidity in depressed patients. We recruited 127 depressed patients without alcohol use problems (non-AUP) and 89 depressed patients with alcohol use problems (AUP). We assessed all patients using the Temperament and Character Inventory (TCI-R) at baseline and after 6 weeks of treatment. Using univariate general linear models (GLMs), we analyzed differences in TCI-R between AUP and non-AUP. GLMs were also used in analyzing the associations between TCI-R changes and antidepressive treatment responses measured with changes in Montgomery Åsberg Depression Rating Scale score (ΔMADRS). Alcohol use explained independently significant proportions of the variation in Novelty Seeking, Self-Directedness, and Persistence. Reward Dependence score change explained 14.1% of the ΔMADRS in AUP, but was non-significant in non-AUP. Character score changes in Self-Directedness and Self-Transcendence explained together 14.1% of ΔMADRS in non-AUP, whereas they were all non-significant in AUP. AUP compared with non-AUP patients had lower Self-Directedness and Persistence and higher Novelty Seeking scores. Detected changes in Reward Dependence and lower Self-Directedness in AUP patients could be reflective of different biological mechanisms associated with depressive symptomatology in alcohol abuse. Changes in character are associated with acute treatment response in non-AUP.

Temperament and characteristics related to attention deficit/hyperactivity disorder symptoms

OBJECTIVE

Adult attention deficit/hyperactivity disorder (ADHD) exhibits symptoms, such as attention deficit and impulsivity, that make it difficult for patients to manage social activities. In this study, we investigated the association of adult ADHD symptoms with temperament and character dimensions, taking into account possible sex interactions.

METHOD

A total of 2917 (1462 males and 1455 females) college students completed the 140 5-point Likert items on the Temperament and Character Inventory-Revised Short version (TCI-RS) and the Attention Deficit/Hyperactivity Disorder Self-Rated Scale (ASRS). According to the ASRS score, subjects were classified into the control group, the inattentive ADHD symptom (IA) group, or the hyperactive/impulsive ADHD symptom (HI) group. Additionally, the scores of the four temperament dimensions and the three character dimensions were compared.

RESULTS

In the IA and HI groups, the NS and HA levels of the temperament dimension were high and the PS level was low compared with the control group. In the character dimension, the levels of SD and CO were significantly lower in the ADHD groups than in the control group (P<0.001). Meanwhile, the ST level in the HI group was significantly higher than in the control group. In the regression analysis after age and gender correction, NS and SD in the IA group and NS, CO, and ST in the HI group were associated with adult ADHD symptoms.

CONCLUSION

The current findings suggest that high novelty seeking may be related to adult ADHD symptoms in the temperament dimension. Furthermore, some character dimensions were associated with adult ADHD symptoms.