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Patients with posttraumatic stress disorder (PTSD) exhibit smaller regional brain volumes in commonly reported regions including the amygdala and hippocampus, regions associated with fear and memory processing. In the current study, we have conducted a voxel-based morphometry (VBM) meta-analysis using whole-brain statistical maps with neuroimaging data from the ENIGMA-PGC PTSD working group.
Methods
T1-weighted structural neuroimaging scans from 36 cohorts (PTSD n = 1309; controls n = 2198) were processed using a standardized VBM pipeline (ENIGMA-VBM tool). We meta-analyzed the resulting statistical maps for voxel-wise differences in gray matter (GM) and white matter (WM) volumes between PTSD patients and controls, performed subgroup analyses considering the trauma exposure of the controls, and examined associations between regional brain volumes and clinical variables including PTSD (CAPS-4/5, PCL-5) and depression severity (BDI-II, PHQ-9).
Results
PTSD patients exhibited smaller GM volumes across the frontal and temporal lobes, and cerebellum, with the most significant effect in the left cerebellum (Hedges’ g = 0.22, pcorrected = .001), and smaller cerebellar WM volume (peak Hedges’ g = 0.14, pcorrected = .008). We observed similar regional differences when comparing patients to trauma-exposed controls, suggesting these structural abnormalities may be specific to PTSD. Regression analyses revealed PTSD severity was negatively associated with GM volumes within the cerebellum (pcorrected = .003), while depression severity was negatively associated with GM volumes within the cerebellum and superior frontal gyrus in patients (pcorrected = .001).
Conclusions
PTSD patients exhibited widespread, regional differences in brain volumes where greater regional deficits appeared to reflect more severe symptoms. Our findings add to the growing literature implicating the cerebellum in PTSD psychopathology.
Guideline-based tobacco treatment is infrequently offered. Electronic health record-enabled patient-generated health data (PGHD) has the potential to increase patient treatment engagement and satisfaction.
Methods:
We evaluated outcomes of a strategy to enable PGHD in a medical oncology clinic from July 1, 2021 to December 31, 2022. Among 12,777 patients, 82.1% received a tobacco screener about use and interest in treatment as part of eCheck-in via the patient portal.
Results:
We attained a broad reach (82.1%) and moderate response rate (30.9%) for this low-burden PGHD strategy. Patients reporting current smoking (n = 240) expressed interest in smoking cessation medication (47.9%) and counseling (35.8%). As a result of patient requests via PGHD, most tobacco treatment requests by patients were addressed by their providers (40.6–80.3%). Among patients with active smoking, those who received/answered the screener (n = 309 ) were more likely to receive tobacco treatment compared with usual care patients who did not have the patient portal (n = 323) (OR = 2.72, 95% CI = 1.93–3.82, P < 0.0001) using propensity scores to adjust for the effect of age, sex, race, insurance, and comorbidity. Patients who received yet ignored the screener (n = 1024) compared with usual care were also more likely to receive tobacco treatment, but to a lesser extent (OR = 2.20, 95% CI = 1.68–2.86, P < 0.0001). We mapped observed and potential benefits to the Translational Science Benefits Model (TSBM).
Discussion:
PGHD via patient portal appears to be a feasible, acceptable, scalable, and cost-effective approach to promote patient-centered care and tobacco treatment in cancer patients. Importantly, the PGHD approach serves as a real world example of cancer prevention leveraging the TSBM.
Objectives/Goals: The Competency-Based All-Level Training (COBALT) curriculum standardizes learning for clinical research coordinators (CRCs) across multiple institutions within Washington, Wyoming, Alaska, Montana, and Idaho (WWAMI), with flexible, topic-specific training at all experience levels, in both academic and industry-sponsored research. Methods/Study Population: The COBALT curriculum was developed in collaboration with subject matter experts, managers of CRCs, and other clinical research professionals from institutions across the WWAMI region. A thorough assessment of existing training programs within the region helped identify gaps and unmet needs. The curriculum was designed within a user-friendly learning management system that can be accessed across institutions. It has been piloted with diverse groups and committees of CRCs, professionals, and institutional leaders in clinical and translational science. Ongoing evaluation is being conducted qualitatively using built-in assessment surveys, demonstrations, and interviews. Results/Anticipated Results: The anticipated outcome is the creation of a highly standardized and efficient training program for clinical research professionals across multiple institutions in the WWAMI region. This program will be carefully tailored to each professional’s level of experience, ensuring personalized skill development. By aligning training with diverse expertise levels, the initiative aims to significantly elevate the quality, consistency, and overall performance of clinical research efforts across the regional research community. Discussion/Significance of Impact: The COBALT curriculum provides a vetted learning curriculum for CRCs, with a tailorable training plan that helps them collaborate with their supervisors to tailor training to their career goals. This ensures that the curriculum is not only comprehensive but also adaptable to individual needs.
This report describes the implementation and evaluation of a unique escape room game/unfolding public health preparedness simulation into nursing education. The innovative approach was designed to teach disease investigation, epidemiological principles, and technical skills such as the tuberculosis (TB) skin testing techniques.
Methods
The escape room/unfolding health preparedness simulation was implemented with 29 pre-licensure nursing students and involved game-like activities as well as a realistic disaster simulation scenario with standardized patients.
Results
The project yielded positive outcomes, with students demonstrating increased knowledge and confidence. Students also recommended the simulation for teaching disaster preparedness, highlighting its effectiveness. Evaluation data also suggested refinement of the simulation around the nurses’ roles.
Conclusions
While implementing this teaching innovation had challenges, the approach enhanced active learning, critical thinking, and teamwork in nursing education, preparing students for real-world health care challenges. The project underscores the importance of such simulations in training nursing students for public health emergencies. It also highlights the need for further research to assess long-term impacts on student outcomes, indicating the potential for continued improvement and development in the field.
Autistic women are at high risk of developing restrictive eating disorders (REDs), such as anorexia nervosa.
Aims
This study provides an overview of the clinical characteristics of autistic women with REDs to (i) enhance understanding of increased risk, and (ii) support the identification of autistic women in eating disorder services.
Method
We compared self-reported autistic and disordered eating characteristics of: autistic participants with REDs (Autism + REDs; n = 57); autistic participants without REDs (Autism; n = 69); and women with REDs who are not autistic (REDs; n = 80). We also included a group of women with high autistic traits (HATs) and REDs, but no formal autism diagnosis (HATs + REDs; n = 38).
Results
Autism + REDs participants scored similarly to Autism participants in terms of autistic characteristics and to REDs participants in terms of experiencing traditional disordered eating symptoms. Autism + REDs participants were distinguished from both groups by having more restricted and repetitive behaviours and autism-specific eating behaviours related to sensory processing, flexibility and social differences. HATs + REDs participants showed a similar pattern of scores to Autism + REDs participants, and both also presented with high levels of co-occurring mental health difficulties, particularly social anxiety.
Conclusion
The presentation of autistic women with REDs is complex, including both traditional disordered eating symptoms and autism-related needs, as well as high levels of co-occurring mental health difficulties. In eating disorder services, the REDs presentation of autistic women and those with HATs should be formulated with reference to autism-specific eating behaviours and co-occurring difficulties. Treatment adaptations should be offered to accommodate autistic characteristics and related needs.
Attention-deficit/hyperactivity disorder (ADHD) symptoms are associated with myriad adverse outcomes, including interpersonal difficulties, but factors that moderate the developmental course and functional impact of ADHD over time are not well understood. The present study evaluated developmental contributions of the triarchic neurobehavioral traits (boldness, meanness, and disinhibition) to ADHD symptomatology and its subdimensions from adolescence to young adulthood. Participants were twins and triplets assessed at ages 14, 17, and 19 (initial N = 1,185, 51.2% female). Path analyses using negative binomial regression revealed that boldness at age 14 was associated with more ADHD symptoms cross-sectionally (especially hyperactivity/impulsivity), but fewer symptoms (especially inattention) at age 19 in the prospective analysis. Notably, inclusion of interpersonal problems at ages 14 and 17 as covariates reduced the latter effect to nonsignificant. Disinhibition concurrently and prospectively predicted higher levels of ADHD symptoms, including both subdimensions, and the prospective effects were partially mediated by greater social impairment at age 17. Meanness prospectively (but not concurrently) predicted higher levels of hyperactivity/impulsivity symptoms. Sex moderated certain associations of meanness and disinhibition with ADHD symptoms. These findings highlight how fundamental neurobehavioral traits shape both psychopathology and adaptive outcomes in the developmental course of ADHD.
Higher education is strongly associated with better cognitive function in older adults. Previous research has also showed that positive psychosocial factors, such as selfefficacy and emotional and instrumental support, are beneficial for late-life cognition. There is prior evidence of a buffering effect of self-efficacy on the relationship between educational disadvantage and poor cognition in older adults, however it is not known if other psychosocial factors modify the schooling-cognition relationship. We hypothesized that higher levels of emotional and instrumental support will diminish the association between lower education and lower cognitive test scores among older adults.
Participants and Methods:
553 older adults without dementia (42.1% non-Latinx Black, 32.2% non-Latinx White, 25.7% Latinx; 63.2% women; average age 74.4 (SD 4.3)) from the Washington Heights-Inwood Columbia Aging Project. Neuropsychological tests assessed four cognitive domains (language, memory, psychomotor processing speed, and visuospatial function). Self-reported emotional and instrumental support were assessed with measures from NIH Toolbox. Linear regression estimated interactions between education and the two support measures on cognition in models stratified by cognitive domain and racial and ethnic group. Covariates included age, sex/gender, and chronic health conditions (e.g. heart disease, stroke, cancer, etc.).
Results:
Education was associated with cognition across racial and ethnic groups. For every one year of schooling, the processing speed z-score composite was 0.33 higher among Latinx participants, 0.10 among non-Latinx Black participants, and 0.03 higher among non-Latinx White participants. The education-cognition relationship was generally similar across cognitive domains with larger effects in non-Latinx Black and Latinx participants than in White participants. Low education was associated with slower processing speed among Black participants with low emotional support (B = 0.224, 95% CI [0.014, 0.096]), but there was no association between low education and processing speed among Black older adults with high levels of emotional support (beta for interaction = -.142, 95% CI [-0.061, -0.001]). A similar pattern of results was observed for instrumental support (beta for interaction = -.207, 95% CI [-0.064, 0.010]). There were no interactions between support and education on other cognitive domains or among Latinx and White participants.
Conclusions:
We found that higher levels of emotional and instrumental support attenuate the detrimental effect of educational disadvantages on processing speed in older Black adults. This may occur via benefits of social capital, which provides access to health resources and knowledge, increased social interaction, an emotional outlet allowing the ability to better cope with stress. Longitudinal analyses are needed to examine temporal patterns of associations. In addition, improving equitable access to high quality schools will improve later-life cognitive outcomes for future generations of older adults. However, for the growing number of Black older adults who will not experience the benefits of structural improvements in the education system, emotional and instrumental support may represent a modifiable psychosocial factor to reduce their disproportionate burden of cognitive morbidity.
Attention-deficit/hyperactivity disorder (ADHD) and obesity are positively associated, with increasing evidence that they share genetic risk factors. Our aim was to examine whether these findings apply to both types of ADHD symptoms for female and male adolescents. We used data from 791 girl and 735 boy twins ages 16−17 years to examine sex-specific phenotypic correlations between the presence of ADHD symptoms and overweight/obese status. For correlations exceeding .20, we then fit bivariate twin models to estimate the genetic and environmental correlations between the presence of ADHD symptoms and overweight/obese status. ADHD symptoms and height/weight were parent- and self-reported, respectively. Phenotypic correlations were .30 (girls) and .08 (boys) for inattention and overweight/obese status and .23 (girls) and .14 (boys) for hyperactivity/impulsivity and overweight/obese status. In girls, both types of ADHD symptoms and overweight/obese status were highly heritable, with unique environmental effects comprising the remaining variance. Furthermore, shared genetic effects explained most of the phenotypic correlations in girls. Results suggest that the positive association of both types of ADHD symptoms with obesity may be stronger in girls than boys. Further, in girls, these associations may stem primarily from shared genetic factors.
People who possess greater mathematical skills (i.e., numeracy) are generally more accurate in interpreting numerical data than less numerate people. However, recent evidence has suggested that more numerate people may use their numerical skills to interpret data only if their initial interpretation conflicts with their worldview. That is, if an initial, intuitive (but incorrect) interpretation of data appears to disconfirm one’s beliefs, then numerical skills are used to further process the data and reach the correct interpretation, whereas numerical skills are not used in situations where an initial incorrect interpretation of the data appears to confirm one’s beliefs (i.e., motivated numeracy). In the present study, participants were presented with several data problems, some with correct answers confirming their political views and other disconfirming their views. The difficulty of these problems was manipulated to examine how numeracy would influence the rate of correct responses on easier vs. more difficult problems. Results indicated that participants were more likely to answer problems correctly if the correct answer confirmed rather than disconfirmed their political views, and this response pattern did not depend on problem difficulty or numerical skill. Although more numerate participants were more accurate overall, this was true both for problems in which the correct answer confirmed and disconfirmed participants’ political views.
To assess the clustering properties of residential urban food environment indicators across neighbourhoods and to determine if clustering profiles are associated with diet outcomes among adults in Brooklyn, New York.
Design:
Cross-sectional.
Setting:
Five neighbourhoods in Brooklyn, New York.
Participants:
Survey data (n 1493) were collected among adults in Brooklyn, New York between April 2019 and September 2019. Data for food environment indicators (fast-food restaurants, bodegas, supermarkets, farmer’s markets, community kitchens, Supplemental Nutrition Assistance Program application centres, food pantries) were drawn from New York databases. Latent profile analysis (LPA) was used to identify individuals’ food access-related profiles, based on food environments measured by the availability of each outlet within each participant’s 800-m buffer. Profile memberships were associated with dietary outcomes using mixed linear regression.
Results:
LPA identified four residential urban food environment profiles (with significant high clusters ranging from 17 to 57 across profiles): limited/low food access, (n 587), bodega-dense (n 140), food swamp (n 254) and high food access (n 512) profiles. Diet outcomes were not statistically different across identified profiles. Only participants in the limited/low food access profile were more likely to consume sugar-sweetened beverages (SSB) than those in the bodega-dense profile (b = 0·44, P < 0·05) in adjusted models.
Conclusions:
Individuals in limited and low food access neighbourhoods are vulnerable to consuming significant amounts of SSB compared with those in bodega-dense communities. Further research is warranted to elucidate strategies to improve fruit and vegetable consumption while reducing SSB intake within residential urban food environments.
Clinical research staff play a critical role in recruiting families for pediatric research, but their views are not well described. We aimed to describe how pediatric research staff build trusting research relationships with patients and their families.
Methods:
We interviewed research staff at one pediatric research institution and its affiliated academic medical center between November 2020 and February 2021. Staff were eligible if they conducted participant recruitment, consent, and/or enrollment for clinical research. We developed our semi-structured interview guide based on a framework for trusting researcher-community partnerships.
Results:
We interviewed 28 research staff, with a median age of 28 years (range 22–50) and a median of 5 years of experience (range 1–29). Interviewees identified factors relevant to relationship building across three levels: the individual staff member, the relational interaction with the family, and the institutional or other structural backdrop. Individual factors included how staff developed recruitment skills, their perceived roles, and their personal motivations. Relational factors spanned four stages of recruitment: before the approach, forming an initial connection with a family, building the connection, and following up. Structural factors were related to access and diversity, clinical interactions, and the COVID-19 pandemic.
Conclusions:
Research staff discussed tensions and supports with various actors, challenges with the integration of research and clinical care, the importance of voluntariness for building trust, and multiple contributors to inequities in research. These findings reveal the importance of ensuring research staff have a voice in institutional policies and are supported to advocate for patients and families.
This article is a clinical guide which discusses the “state-of-the-art” usage of the classic monoamine oxidase inhibitor (MAOI) antidepressants (phenelzine, tranylcypromine, and isocarboxazid) in modern psychiatric practice. The guide is for all clinicians, including those who may not be experienced MAOI prescribers. It discusses indications, drug-drug interactions, side-effect management, and the safety of various augmentation strategies. There is a clear and broad consensus (more than 70 international expert endorsers), based on 6 decades of experience, for the recommendations herein exposited. They are based on empirical evidence and expert opinion—this guide is presented as a new specialist-consensus standard. The guide provides practical clinical advice, and is the basis for the rational use of these drugs, particularly because it improves and updates knowledge, and corrects the various misconceptions that have hitherto been prominent in the literature, partly due to insufficient knowledge of pharmacology. The guide suggests that MAOIs should always be considered in cases of treatment-resistant depression (including those melancholic in nature), and prior to electroconvulsive therapy—while taking into account of patient preference. In selected cases, they may be considered earlier in the treatment algorithm than has previously been customary, and should not be regarded as drugs of last resort; they may prove decisively effective when many other treatments have failed. The guide clarifies key points on the concomitant use of incorrectly proscribed drugs such as methylphenidate and some tricyclic antidepressants. It also illustrates the straightforward “bridging” methods that may be used to transition simply and safely from other antidepressants to MAOIs.
Obesity remains a serious relevant public health concern throughout the world despite related countermeasures being well understood (i.e. mainly physical activity and an adjusted diet). Among different nutritional approaches, there is a growing interest in ketogenic diets (KD) to manipulate body mass (BM) and to enhance fat mass loss. KD reduce the daily amount of carbohydrate intake drastically. This results in increased fatty acid utilisation, leading to an increase in blood ketone bodies (acetoacetate, 3-β-hydroxybutyrate and acetone) and therefore metabolic ketosis. For many years, nutritional intervention studies have focused on reducing dietary fat with little or conflicting positive results over the long term. Moreover, current nutritional guidelines for athletes propose carbohydrate-based diets to augment muscular adaptations. This review discusses the physiological basis of KD and their effects on BM reduction and body composition improvements in sedentary individuals combined with different types of exercise (resistance training or endurance training) in individuals with obesity and athletes. Ultimately, we discuss the strengths and the weaknesses of these nutritional interventions together with precautionary measures that should be observed in both individuals with obesity and athletic populations. A literature search from 1921 to April 2021 using Medline, Google Scholar, PubMed, Web of Science, Scopus and Sportdiscus Databases was used to identify relevant studies. In summary, based on the current evidence, KD are an efficient method to reduce BM and body fat in both individuals with obesity and athletes. However, these positive impacts are mainly because of the appetite suppressive effects of KD, which can decrease daily energy intake. Therefore, KD do not have any superior benefits to non-KD in BM and body fat loss in individuals with obesity and athletic populations in an isoenergetic situation. In sedentary individuals with obesity, it seems that fat-free mass (FFM) changes appear to be as great, if not greater, than decreases following a low-fat diet. In terms of lean mass, it seems that following a KD can cause FFM loss in resistance-trained individuals. In contrast, the FFM-preserving effects of KD are more efficient in endurance-trained compared with resistance-trained individuals.
Engagement with members is an important issue for the Royal College of Psychiatrists (RCPsych) and an area for ongoing development. This is an issue that extends to Psychiatry trainees and the Psychiatric Trainees’ Committee (PTC) has adopted increasing engagement as one of its key aims. Divisional representatives in different areas of the UK had noted that trainees had limited knowledge of the PTC or its roles and projects both within the College and local areas. To improve this it was decided to pilot a project that established a social media platform for trainees to improve communication between the PTC, it's representatives and trainees. It was decided that Workplace (a professional version of Facebook) would be used. This had already been established in the Severn Deanery.
Method
Northern Ireland (NI) and the East of England (EoE) deaneries were selected as pilot areas for the project. Preparation for the project included collaboration with trainees from the Severn deanery and meeting with the RCPsych Digital team. A scoping questionnaire was circulated to trainees in each deanery.
Following this, two closed groups were initiated on Workplace in August 2019 for Northern Ireland and East of England trainees.
Result
Results from the survey sent prior to the social media pages being established indicated there was appetite among trainees for the project. The pages were established in July 2019. The pilot project was promoted by representatives.
In the initial phases, approximately 40% of trainees signed up. Information regarding college and local events, committee meeting updates and training opportunities was disseminated on the platform. There was evidence of early use by trainees outside of the representative group.
This however was not sustained and gradually use of the platform reduced over the pilot period, both in postings and membership. A further questionnaire circulated in July 2020 highlighted trainees’ concerns relating to the platform, including concerns around data protection and a high number of notifications associated with the Workplace medium. The ultimate impact on engagement was also felt to be minimal.
Conclusion
Following feedback and increasing usage costs by Workplace, it was decided not to continue with a nationwide role out of the project. COVID-19 has seen the successful use of platforms such as Microsoft Teams and these may be considered in the future, given their integration with existing trust systems.
The triarchic model was advanced as an integrative, trait-based framework for investigating psychopathy using different assessment methods and across developmental periods. Recent research has shown that the triarchic traits of boldness, meanness, and disinhibition can be operationalized effectively in youth, but longitudinal research is needed to realize the model's potential to advance developmental understanding of psychopathy. We report on the creation and validation of scale measures of the triarchic traits using questionnaire items available in the University of Southern California Risk Factors for Antisocial Behavior (RFAB) project, a large-scale longitudinal study of the development of antisocial behavior that includes measures from multiple modalities (self-report, informant rating, clinical-diagnostic, task-behavioral, physiological). Using a construct-rating and psychometric refinement approach, we developed triarchic scales that showed acceptable reliability, expected intercorrelations, and good temporal stability. The scales showed theory-consistent relations with external criteria including measures of psychopathy, internalizing/externalizing psychopathology, antisocial behavior, and substance use. Findings demonstrate the viability of measuring triarchic traits in the RFAB sample, extend the known nomological network of these traits into the developmental realm, and provide a foundation for follow-up studies examining the etiology of psychopathic traits and their relations with multimodal measures of cognitive-affective function and proneness to clinical problems.
In response to the 2013–2016 Ebola virus disease outbreak, the US government designated certain healthcare institutions as Ebola treatment centers (ETCs) to better prepare for future emerging infectious disease outbreaks. This study investigated ETC experiences and critical care policies for patients with viral hemorrhagic fever (VHF).
Design:
A 58-item questionnaire elicited information on policies for 9 critical care interventions, factors that limited care provision, and innovations developed to deliver care.
Setting and participants:
The questionnaire was sent to 82 ETCs.
Methods:
We analyzed ordinal and categorical data pertaining to the ETC characteristics and descriptive data about their policies and perceived challenges. Statistical analyses assessed whether ETCs with experience caring for VHF patients were more likely to have critical care policies than those that did not.
Results:
Of the 27 ETCs who responded, 17 (63%) were included. Among them, 8 (47%) reported experience caring for persons under investigation or confirmed cases of VHF. Most felt ready to provide intubation, chest compressions, and renal replacement therapy to these patients. The factors most cited for limiting care were staff safety and clinical futility. Innovations developed to better provide care included increased simulation training and alternative technologies for procedures and communication.
Conclusions:
There were broad similarities in critical care policies and limitations among institutions. There were several interventions, namely ECMO and cricothyrotomy, which few institutions felt ready to provide. Future studies could identify obstacles to providing these interventions and explore policy changes after increased experience with novel infectious diseases, such as COVID-19.
Conventional airway management, including intubation and the various modes of lung ventilation, is usually successful. When it fails (cannot intubate, cannot ventilate/oxygenate) it is a life-threatening emergency and will lead to hypoxic brain damage in a few minutes, followed by death, if not resolved. The common final pathway for securing the airway and oxygenation is an emergency front of neck airway (eFONA). Immediate action with a clear plan, appropriate equipment and skills is essential. The ability to efficiently perform an eFONA is a fundamental requirement for any practitioner engaged in advanced airway management. Many techniques are described and it is a difficult area to study, so the evidence of superiority of one technique over others is hard to establish. Preparation, in terms of equipment availability, procedural practice, team familiarity and prompt transitioning through the algorithm when other techniques fail, is important for patient safety. These human factors aspects of eFONA management are at least as important as the procedural technique chosen. This chapter considers the risk factors for airway failure and management of the cannot intubate, cannot oxygenate situation and eFONA procedure in adults and children.
More than 90% of individuals with Alzheimer’s disease (AD) experience behavioral and neuropsychiatric symptoms (NPS), such as agitation. However, little is known regarding the specific burden of agitation for Alzheimer’s patients.
Design:
A global systematic literature review was conducted in MEDLINE and Embase for studies of clinical, humanistic, and economic burden of agitation in AD/dementia published from 2006–2016. References of identified papers and related literature reviews were examined. Studies meeting predetermined inclusion criteria for burden of agitation/NPS were summarized.
Results:
Eighty papers met the inclusion criteria for burden of agitation in dementia. Wide ranges of agitation prevalence were reported, but few papers provided information on incidence. The association of agitation with AD severity was presented in multiple studies; a few suggested positive association of agitation with mortality.
Conclusions:
High prevalence of agitation is consistent with earlier reports, but several gaps in understanding of agitation in AD need further exploration.
The Triarchic Psychopathy Measure (TriPM) provides Disinhibition, Boldness, and Meanness scales for assessing the three trait domains of the triarchic model. Here we examined the genetic and environmental etiology of these three domains, including evaluation of potential sex differences.
Methods
A total of 1016 men and women ages 19–20 years were drawn from the University of Southern California Risk Factors for Antisocial Behavior twin study.
Results
Scores for the three TriPM scales were correlated to differing degrees, with the strongest phenotypic correlation between Disinhibition and Meanness. No sex differences were found in the genetic and environmental influences underlying these three domains, suggesting that the same genes and life experiences contribute to these traits in young men and women. For TriPM Disinhibition and Boldness, genetic factors explained about half or less of the variance, with the rest of the variance being explained by non-shared environmental factors. For TriPM Meanness, on the other hand, genetic, shared environmental, and non-shared environmental factors accounted for the variance. The phenotypic correlation between Disinhibition and Meanness was explained in part by common genes (26%), with the remainder attributable about equally to common shared (39%), and non-shared environmental influences (35%).
Conclusions
These findings contribute to our understanding of psychopathic personality traits by demonstrating the importance of heritable factors for disinhibition and boldness facets of psychopathy, and the importance of shared environmental influences for the meanness facet.