Cannabis use in patients with early psychosis is associated with alterations in putamen and thalamic shape

Around half of patients with early psychosis have a history of cannabis use. We aimed to determine if there are neurobiological differences in these the subgroups of persons with psychosis with and without a history of cannabis use. We expected to see regional deflations in hippocampus as a neurotoxic effect and regional inflations in striatal regions implicated in addictive processes. Volumetric, T1w MRIs were acquired from people with a diagnosis psychosis with (PwP + C = 28) or without (PwP − C = 26) a history of cannabis use; and Controls with (C + C = 16) or without (C − C = 22) cannabis use. We undertook vertex‐based shape analysis of the brainstem, amygdala, hippocampus, globus pallidus, nucleus accumbens, caudate, putamen, thalamus using FSL FIRST. Clusters were defined through Threshold Free Cluster Enhancement and Family Wise Error was set at p < .05. We adjusted analyses for age, sex, tobacco and alcohol use. The putamen (bilaterally) and the right thalamus showed regional enlargement in PwP + C versus PwP − C. There were no areas of regional deflation. There were no significant differences between C + C and C − C. Cannabis use in participants with psychosis is associated with morphological alterations in subcortical structures. Putamen and thalamic enlargement may be related to compulsivity in patients with a history of cannabis use

Association of cannabis with glutamatergic levels in patients with early psychosis: Evidence for altered volume striatal glutamate relationships in patients with a history of cannabis use in early psychosis

The associative striatum, an established substrate in psychosis, receives widespread glutamatergic projections. We sought to see if glutamatergic indices are altered between early psychosis patients with and without a history of cannabis use and characterise the relationship to grey matter. 92 participants were scanned: Early Psychosis with a history of cannabis use (EPC\u2009=\u200929); Early Psychosis with minimal cannabis use (EPMC\u2009=\u200925); Controls with a history of cannabis use (HCC\u2009=\u200916) and Controls with minimal use (HCMC\u2009=\u200922). Whole brain T1 weighted MR images and localised proton MR spectra were acquired from head of caudate, anterior cingulate and hippocampus. We examined relationships in regions with known high cannabinoid 1 receptor (CB1R) expression (grey matter, cortex, hippocampus, amygdala) and low expression (white matter, ventricles, brainstem) to caudate Glutamine+Glutamate (Glx). Patients were well matched in symptoms, function and medication. There was no significant group difference in Glx in any region. In EPC grey matter volume explained 31.9% of the variance of caudate Glx (p\u2009=\u20090.003) and amygdala volume explained 36.9% (p\u2009=\u20090.001) of caudate Glx. There was no significant relationship in EPMC. The EPC vs EPMC interaction was significant (p\u2009=\u20090.042). There was no such relationship in control regions. These results are the first to demonstrate association of grey matter volume and striatal glutamate in the EPC group. This may suggest a history of cannabis use leads to a conformational change in distal CB1 rich grey matter regions to influence striatal glutamatergic levels or that such connectivity predisposes to heavy cannabis use

Association of cannabis with glutamatergic levels in patients with early psychosis: Evidence for altered volume striatal glutamate relationships in patients with a history of cannabis use in early psychosis

he associative striatum, an established substrate in psychosis, receives widespread glutamatergic projections. We sought to see if glutamatergic indices are altered between early psychosis patients with and without a history of cannabis use and characterise the relationship to grey matter. 92 participants were scanned: Early Psychosis with a history of cannabis use (EPC = 29); Early Psychosis with minimal cannabis use (EPMC = 25); Controls with a history of cannabis use (HCC = 16) and Controls with minimal use (HCMC = 22). Whole brain T1 weighted MR images and localised proton MR spectra were acquired from head of caudate, anterior cingulate and hippocampus. We examined relationships in regions with known high cannabinoid 1 receptor (CB1R) expression (grey matter, cortex, hippocampus, amygdala) and low expression (white matter, ventricles, brainstem) to caudate Glutamine+Glutamate (Glx). Patients were well matched in symptoms, function and medication. There was no significant group difference in Glx in any region. In EPC grey matter volume explained 31.9% of the variance of caudate Glx (p = 0.003) and amygdala volume explained 36.9% (p = 0.001) of caudate Glx. There was no significant relationship in EPMC. The EPC vs EPMC interaction was significant (p = 0.042). There was no such relationship in control regions. These results are the first to demonstrate association of grey matter volume and striatal glutamate in the EPC group. This may suggest a history of cannabis use leads to a conformational change in distal CB1 rich grey matter regions to influence striatal glutamatergic levels or that such connectivity predisposes to heavy cannabis use

Correction to: Cluster identification, selection, and description in Cluster randomized crossover trials: the PREP-IT trials

An amendment to this paper has been published and can be accessed via the original article

Cognitive Distortions and Psychiatric Diagnosis in Dually Diagnosed Adolescents

Objective The purpose of this study was to examine the characteristics and patterns of cognitive distortions among psychiatrically hospitalized adolescents. Method Measures of cognitive distortions, depression, and hopelessness were administered to 135 adolescents on two psychiatric inpatient units. Subjects were grouped according to their Axis I diagnoses: depression only, conduct disorder only, depression and substance abuse, conduct disorder and substance abuse, all three diagnoses, and none of the three diagnoses. Results Multivariate analyses of covariance indicated that differently diagnosed adolescents exhibited varying levels of cognitive distorting as measured by the Children\u27s Negative Cognitive Errors Questionnaire (CNCEQ). In particular, adolescents with multiple Axis I diagnoses tended to score highest. On all but one of four CNCEQ subscales, the depression only group evidenced as much cognitive distortion as did the group with multiple diagnoses. However, each diagnostic grouping demonstrated its own somewhat distinct distortions based on CNCEQ subscales. Conclusions Findings are discussed in terms of the utility of differentiating cognitive styles for subsequent treatment. It is suggested that disparate cognitive interventions could be matched with adolescents displaying particular problems

Individual-focused occupational health interventions: a meta-analysis of randomized controlled trials

Employee stress and related psychological strain is not only damaging for those that experience it, but is also costly for employers and society at large. This study aims to evaluate the effectiveness of individual-focused occupational health interventions in a comprehensive meta-analysis, improving the interpretability of results by analyzing the interventions' impact on specific outcome measures. A literature search of randomized control trials (RCTs) of stress management, health or wellness interventions in healthy workers was completed using PubMed, Scopus, Web of Science, PsycINFO, and PsycARTICLES. The following outcome measures were meta-analyzed: (a) Perceive Stress Scale (PSS), (b) General Health Questionnaire (GHQ), (c) State-Trait Anxiety Inventory (STAI), (d) Maslach Burnout Inventory (MBI), and (e) absenteeism. Forty-nine studies met the inclusion criteria and were included in a random-effects meta-analysis. There was a beneficial effect of interventions across all outcome measures (all p < .05) except for the MBI Personal Accomplishment subscale and absenteeism. The largest effect size (g = -0.65, p < .001) was observed with the PSS scale. For separate subanalyses considering intervention types, multimodal interventions had the largest impact on reducing state anxiety (g = -1.01, p = .02), followed by relaxation interventions reducing PSS levels (g = -0.75, p < .001) and cognitive interventions reducing PSS levels (g = -0.66, p < .001). This meta-analysis provides evidence that individual-focused occupational health interventions can have a significant effect on stress-related outcomes postintervention and at follow-up. It also suggests that the intervention's effectiveness varies based on the outcome measures used

Social Skills and Depression in Adolescent Substance Abusers

Abstract The present study provided an assessment of social skills and depression in adolescent substance abusers hospitalized in an inpatient psychiatric setting. Level of social skill was evaluated using the Adolescent Assertion Expression Scale and the Loneliness Scale. Depression and related problems were examined through administration of the Beck Depression Inventory, Beck Hopelesness Scale, and the Rosenberg Self-Esteem Scale. Comparisons with normative values and clinical cut-offs (by gender) indicated that female adolescent substance abusers were less submissive and more aggressive than normative counterparts; male substance abusers exhibited less assertiveness. In addition, mild to moderate levels of depression were evident in both female and male substance abusers. Further, results of correlational analyses revealed several significant relationships between measures of social skills and depression. Results are discussed in terms of: (a) the need for finer grained analyses of social functioning in adolescent substance abusers, (b) the potential value of skills intervention for a subgroup of these individuals, and (c) the need for longitudinal data to more clearly explicate patterns and sequencing of social (mal)adjustment, affective disorder, and onset of substance abuse in this population. ☆ This study was supported in part by the Center for Education and Drug Abuse Research (CEDAR) and funded by the National Institute on Drug Abuse (No. DA05605). Reprint requests should be directed to Vincent B. Van Hasselt, Center for Psychological Studies, Nova University, 3301 College Avenue, Fort Lauderdale, FL 33314. The authors wish to express their appreciation to Tracey Eck for her technical assistance in preparation of this manuscript

Cognitive Distortions and Adolescent Affective Disorder: Validity of the CNCEQ in an Inpatient Sample

Despite a proliferation of recent research examining childhood and adolescent depression, the area still lags behind the adult depression field, particularly in the investigation of cognitive correlates of affective psychopathology. To advance cognitive research with youth, the Children\u27s Negative Cognitive Error Questionnaire (CNCEQ) was developed to provide a measure of cognitive distortions or errors in children and adolescents. Yet, few studies have employed the CNCEQ and no evidence exists supporting the validity of its four component cognitive error scales. The purpose of the present study was to examine the construct validity of the CNCEQ and its constituent scales through the use of factor analysis and criterion-group comparisons. Groups of adolescent psychiatric inpatients, diagnosed as affective or disruptive disordered, completed the CNCEQ following admission. Results failed to support the implicit four-factor structure of the CNCEQ, instead suggesting the appropriateness of a single-factor solution labeled negative thinking. Despite no diagnostic group differences on the CNCEQ total or other scale scores, affective disordered patients evinced more cognitive errors on the Overgeneralizing scale. Findings suggest that the CNCEQ in its current stage of development holds promise, yet requires refinement to produce a valid measure of cognitive functioning in youth