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1.
Neurosci Biobehav Rev ; : 105913, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-39362417

RESUMEN

Schizophrenia (SZ) is a severe mental health condition involving gene-environment interactions, with obstetric complications (OCs) conferring an elevated risk for the disease. Current research suggests that OCs may exacerbate SZ symptoms. This study conducted a systematic review and meta-analysis to comprehensively evaluate differences in psychopathology between individuals with and without exposure to OCs in relation to SZ and related disorders. We systematically searched PubMed, PsycINFO, and SCOPUS to identify eligible studies. A total of 4,091 records were retrieved through systematic and citation searches. 14 studies were included in the review, and 12 met the criteria for meta-analysis, involving 2,992 patients. The analysis revealed that SZ patients who had been exposed to OCs exhibited significantly higher levels of positive symptoms (SMD=0.10, 95%CI=0.01,0.20; p=0.03), general psychopathology (SMD=0.37, 95%CI=0.22,0.52; p<0.001), total clinical symptomatology (SMD=0.44, 95%CI=0.24,0.64; p<0.001) and depressive symptoms (SMD=0.47, 95%CI=0.09,0.84; p=0.01). No significant differences were found in negative symptomatology and functioning. Our results suggest that OCs are not only associated with an increased risk of developing psychosis but with more severe symptomatology.

2.
Dev Psychopathol ; : 1-15, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39363707

RESUMEN

Children's externalizing behaviors are associated with impairments across the lifespan. Developmental psychopathology theories propose transactional (bidirectional) associations between child externalizing behaviors and parenting during childhood and adolescence. Yet, these foundational relations in early childhood are not well-studied. Utilizing a large, mixed-sex sample, we examined the reciprocal nature of parenting and child externalizing behaviors across early childhood using robust repeated-measures models. Repeated measures data were drawn from a socioeconomically diverse, longitudinal pregnancy cohort of 1287 (64% Black, 31% White) mother-child dyads at four time points (ages one to six). Three variables were included in cross-lagged panel models: observed parenting quality, child externalizing symptoms, and a maternal risk composite. In covariate-adjusted models, higher parenting quality at Wave 1 predicted lower child externalizing symptoms at Wave 2. Higher externalizing symptoms at Wave 1 and Wave 2 predicted lower parenting quality at Wave 2 and Wave 3, respectively. Maternal risk and parenting quality were not significantly associated. Findings showed both parent-driven and child-driven effects across early childhood that did not vary by child sex. The transactional nature of the parent-child relationship begins in infancy, underscoring the importance of early screening and provision of supports for families to minimize and prevent the development of serious psychopathology.

3.
Dev Psychopathol ; : 1-15, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39363710

RESUMEN

The COVID-19 pandemic has presented youth and families with a broad spectrum of unique stressors. Given that adolescents are at increased risk for mental health and emotional difficulties, it is critical to explore family processes that confer resilience for youth in the face of stress. The current study investigated caregiver emotion regulation (ER) as a familial factor contributing to youth ER and risk for psychopathology following stressful life events. In a longitudinal sample of 224 youth (M age = 12.65 years) and their caregivers, we examined whether caregiver and youth engagement in ER strategies early in the pandemic mediated the associations of pandemic-related stress with youth internalizing and externalizing symptoms six months later. Leveraging serial mediation analysis, we demonstrated that caregiver and youth rumination, but not expressive suppression or cognitive reappraisal, mediated the prospective associations of pandemic-related stress with youth internalizing and externalizing symptoms. Greater exposure to pandemic-related stressors was associated with greater caregiver rumination, which, in turn, related to greater rumination in youth, and higher levels of youth internalizing and externalizing symptoms thereafter. Family interventions that target caregiver ER, specifically rumination, may buffer against the consequences of stress on youth engagement in maladaptive ER strategies and risk for psychopathology.

4.
Dev Psychopathol ; : 1-13, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39363720

RESUMEN

Dante Cicchetti propelled forward the field of developmental psychopathology by advancing this framework and championing new methods, including emphasizing the central role that multilevel analysis holds for explicating pathways of risk and resilience. His work continues to change the face of existing science. It has also paved the way for the formation of new projects, like the Research Domain Criteria initiative. This paper uses our laboratory's work on multilevel approaches to studying adolescent depression, non-suicidal self-injury, and suicidal thoughts and behaviors to shine a spotlight on Dr Cicchetti's contributions. In addition, we review recent developments, ongoing challenges, and promising future directions within developmental psychopathology as we endeavor to carry on the tradition of growth in the field.

5.
Eur Psychiatry ; 67(1): e66, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39363747

RESUMEN

BACKGROUND: Stressors across the lifespan are associated with the onset of major depressive disorder (MDD) and increased severity of depressive symptoms. However, it is unclear how lifetime stressors are related to specific MDD subtypes. The present study aims to examine the relationships between MDD subtypes and stressors experienced across the lifespan while considering potential confounders. METHODS: Data analyzed were from the Zone d'Épidémiologie Psychiatrique du Sud-Ouest de Montréal (N = 1351). Lifetime stressors included childhood maltreatment, child-parent bonding, and stressful life events. Person-centered analyses were used to identify the clusters/profiles of the studied variables and multinomial logistic regression analyses were performed to examine the relationships between stressors and identified MDD subtypes. Intersectional analysis was applied to further examine how distal stressors interact with proximal stressors to impact the development of MDD subtypes. RESULTS: There was a significant association between proximal stressors and melancholic depression, whereas severe atypical depression and moderate depression were only associated with some domains of stressful life events. Additionally, those with severe atypical depression and melancholic depression were more likely to be exposed to distal stressors such as childhood maltreatment. The combinations of distal and proximal stressors predicted a greater risk of all MDD subtypes except for moderate atypical depression. CONCLUSIONS: MDD was characterized into four subtypes based on depressive symptoms and severity. Different stressor profiles were linked with various MDD subtypes. More specific interventions and clinical management are called to provide precision treatment for MDD patients with unique stressor profiles and MDD subtypes.


Asunto(s)
Trastorno Depresivo Mayor , Estrés Psicológico , Humanos , Trastorno Depresivo Mayor/psicología , Trastorno Depresivo Mayor/epidemiología , Femenino , Masculino , Adulto , Estudios Longitudinales , Estrés Psicológico/psicología , Persona de Mediana Edad , Acontecimientos que Cambian la Vida , Índice de Severidad de la Enfermedad , Adultos Sobrevivientes del Maltrato a los Niños/psicología , Adultos Sobrevivientes del Maltrato a los Niños/estadística & datos numéricos , Experiencias Adversas de la Infancia/estadística & datos numéricos , Adulto Joven
6.
Dev Psychopathol ; : 1-18, 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39363871

RESUMEN

In this essay, I will briefly sample different instances of the utilization of the concept of resilience, attempting to complement a comprehensive representation of the field in the special issue of Development and Psychopathology inspired by the 42nd Minnesota Symposium on Child Psychology, hosted by the Institute of Child Development at the University of Minnesota and held in October of 2022. Having established the general context of the field, I will zoom in on some of its features, which I consider "low-hanging fruit" and which can be harvested in a systematic way to advance the study of resilience in the context of the future of developmental psychopathology.

7.
Int J Eat Disord ; 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39364628

RESUMEN

OBJECTIVE: The present longitudinal study examined sex-specific, symptom-level relationships among emotion regulation (ER), interpersonal problems (IP), and eating disorder (ED) psychopathology in a large sample of Chinese adolescents. METHOD: Data were from a project with four waves of data collection (N = 1540; 710 boys and 830 girls) at 6-month intervals over 18 months. Questionnaires assessed ED psychopathology, ER, and IP at each wave of data collection. Longitudinal network analyses were conducted separately for boys and girls. Sex differences in the network structures were also examined. RESULTS: The results revealed pronounced heterogeneity in the presentation of ED psychopathology, ER, and IP across Chinese adolescent boys and girls longitudinally and intra-individually. For example, weight/shape preoccupation in ED psychopathology and awareness in ER emerged as important nodes in the temporal network for boys. However, weight/shape preoccupation and dissatisfaction in ED psychopathology were identified as the most important nodes in the temporal network for girls. Regarding bridge strength, awareness in ER emerged as the node with the highest connectivity in the temporal network for boys. At the same time, weight/shape dissatisfaction in ED psychopathology was the node with the highest connectivity for girls. DISCUSSION: The current study extended network theory to better understand the longitudinal interplay among ER, IP, and ED psychopathology in Chinese adolescents and their sex differences in the importance of symptoms. Such insights may pave the way for developing targeted prevention and treatment strategies for adolescent boys and girls in China.

8.
Asian J Psychiatr ; 102: 104259, 2024 Sep 29.
Artículo en Inglés | MEDLINE | ID: mdl-39366165

RESUMEN

Updates regarding the dimensional model of personality disorder in the DSM-5 and ICD-11 have stimulated interest in the concept of personality functioning (PF). A growing number of literature has demonstrated the extensive empirical basis, validated evaluation tools, and clinical utility of the concept of PF. The concept of PF provides a construct for the diagnosis and evaluation of personality disorders. As a trans-diagnostic factor, PF is of great significance in the etiology and development of many mental and physical conditions. PF can be improved per se, primarily through psychotherapy. The evaluation and treatment of low PF should be considered in all relevant cases. The current study aims to provide a comprehensive review of the concept, pathogenesis, measurement, prevalence, psychopathological significance, as well as intervention for disordered PF.

9.
Clin Psychol Sci ; 12(5): 823-839, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39359716

RESUMEN

Elevated levels of Neuroticism/Negative Emotionality (N/NE) and, less consistently, lower levels of Extraversion/Positive Emotionality (E/PE) confer risk for pathological depression and anxiety. To date, most prospective-longitudinal research has narrowly focused on traditional diagnostic categories, creating uncertainty about the precise nature of these prospective associations. Adopting an explicitly hierarchical-dimensional approach, we examined the association between baseline variation in personality and longitudinal changes in broad and narrow internalizing-symptom dimensions in 234 emerging adults followed for 2.5 years, during the transition from older adolescence to early adulthood. N/NE was uniquely associated with increases in broadband internalizing-the core cognitive and affective symptoms that cut across the emotional disorders-and unrelated to the narrower dimensions of positive affect and anxious arousal that differentiate specific internalizing presentations. Variation in E/PE and several other Big Five traits was cross-sectionally, but not prospectively, related to longitudinal changes in specific internalizing symptoms. Exploratory personality-facet-level analyses provided preliminary evidence of more granular associations between personality and longitudinal changes in internalizing symptoms. These observations enhance the precision of models linking personality to internalizing illness; highlight the centrality of N/NE to increases in transdiagnostic internalizing symptoms during a key developmental chapter; and set the stage for developing more effective prevention and treatment strategies.

10.
Dev Psychopathol ; : 1-15, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-39350538

RESUMEN

Dimensional models of early life adversity highlight the distinct roles of deprivation and threat in shaping neurocognitive development and mental health. However, relatively little is known about the role of unpredictability within each dimension. We estimated both the average levels of, and the temporal unpredictability of deprivation and threat exposure during adolescence in a high-risk, longitudinal sample of 1354 youth (Pathways to Desistance study). We then related these estimates to later life psychological distress, and Antisocial and Borderline personality traits, and tested whether any effects are mediated by future orientation. High average levels of both deprivation and threat exposure were found to be associated with worse mental health on all three outcomes, but only the effects on Antisocial and Borderline personality traits were mediated by decreased future orientation, a pattern consistent with evolutionary models of psychopathology. Unpredictability in deprivation exposure proved to be associated with increased psychological distress and a higher number of Borderline traits, but with increased future orientation. There was some evidence of unpredictability in threat exposure buffering against the detrimental developmental effects of average threat levels. Our results suggest that the effects of unpredictability are distinct within different dimensions of early life adversity.

11.
J Autism Dev Disord ; 2024 Oct 07.
Artículo en Inglés | MEDLINE | ID: mdl-39373882

RESUMEN

The current study compared the prevalence of cognitive and psychopathological impairments among 24 preschool children with Williams syndrome (WS) (aged 2.20 to 5.97 years) and 53 controls without WS and screened for developmental or psychological diagnoses (aged 2.21 to 5.89 years) matched on chronological age and sex distribution. Associations between sex, chronological age, early development and psychopathology were also investigated. The Child Behavior Checklist-Preschool Version (CBCL) and the Mullen Scales of Early Learning were administered. Higher reported rates of Attention Problems, Emotional Reactivity, Somatic Complaints, Withdrawal, Affective Problems and Total Problems were found in preschool children with WS. There were no significant group differences in prevalence rates of all other CBCL domains. Attention Problems were the most prevalent psychopathology in preschool children with WS (33% falling in the clinically significant range), followed by Affective Problems (29% in clinically significant range), then Anxiety Problems (17%) or Attention Deficit/Hyperactivity Problems (17%). Among children without WS, the highest prevalence rates of psychopathology were for Attention Problems (4% falling in the clinically significant range), Aggressive Behaviour (4%), Sleep Problems (4%) and Oppositional Defiant Problems (4%). There were no significant associations between sex or chronological age and CBCL-reported psychopathology for either group. In addition, there were no significant relationships between CBCL ratings and verbal ability, nonverbal ability or overall developmental level in either group. Findings highlight variations in the pattern of psychopathology among preschool children with WS compared to those without WS, which needs to be considered in clinical management and future research.

12.
Dev Psychopathol ; : 1-17, 2024 Oct 03.
Artículo en Inglés | MEDLINE | ID: mdl-39359017

RESUMEN

Associations between adversity and youth psychopathology likely vary based on the types and timing of experiences. Major theories suggest that the impact of childhood adversity may either be cumulative in type (the more types of adversity, the worse outcomes) or in timing (the longer exposure, the worse outcomes) or, alternatively, specific concerning the type (e.g., parenting, home, neighborhood) or the timing of adversity (e.g., specific developmental periods). In a longitudinal sample from the Future of Families and Wellbeing Study (N = 4,210), we evaluated these competing hypotheses using a data-driven structured life-course modeling approach using risk factors examined at child age 1 (infancy), 3 (toddlerhood), 5 (early childhood), and 9 (middle childhood). Results showed that exposures to more types of adversity for longer durations (i.e., cumulative in both type and timing) best predicted youth psychopathology. Adversities that occurred at age 9 were better predictors of youth psychopathology as compared to those experienced earlier, except for neglect, which was predictive of internalizing symptoms when experienced at age 3. Throughout childhood (across ages 1-9), aside from the accumulation of all adversities, parental stress and low collective efficacy were the strongest predictors of internalizing symptoms, whereas psychological aggression was predictive of externalizing symptoms.

13.
Front Psychiatry ; 15: 1409216, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39238938

RESUMEN

For youth care professionals who work with families with complex needs, we implemented an interagency, family-focused approach involving child and adult mental health care services and child protection services. The primary objective of the collaboration was to minimize fragmentation in service delivery and to improve practitioners' self-efficacy in supporting families. A total of 50 families were enrolled between 2020 and 2023. Quantitative descriptive analysis was conducted to map the sample characteristics and the correlations between the practitioners' consultation requests and the recommendations they received. We evaluated the applicability of the model using semi-structured interviews. Results revealed the frequent socioeconomic and psychosocial challenges and co-current mental health issues faced by the families. As expected, practitioners who work with families experiencing complex and multiple problems encountered a range of difficulties in their service delivery. These related to barriers such as poor role demarcation between organizations, practitioners' unrealistic expectations of other services, the impact of multiple problems on family well-being, and complicated family dynamics. The interprofessional collaboration improved the practitioners' self-efficacy in supporting families. They also perceived improvements in child safety. The study emphasizes the need for clear pathways for youth care practitioners to obtain assistance from adult mental health services and to liaise with community support and services. It proposes including adults and young people with lived experiences in the interprofessional collaboration. The study data provides initial evidence that the interagency model has added value for youth care professionals who struggle with issues in family-focused care.

14.
Br J Clin Psychol ; 2024 Sep 16.
Artículo en Inglés | MEDLINE | ID: mdl-39282950

RESUMEN

OBJECTIVES: Emotion regulation plays an important role in the development and maintenance of psychopathology. However, the question whether specific ER skills are related to specific psychological symptoms has rarely been studied, but has important implications for targeted interventions. This analysis aims to explore potential differential associations between various ER skills and psychological symptoms using a network analysis approach. METHODS: Routine data from a transdiagnostic clinical sample of 716 patients (460 females, 256 males) from an outpatient clinic for psychotherapy were analysed. Nine ER skills were assessed with the Emotion Regulation Skills Questionnaire, and nine symptom dimension scores were obtained using the Brief Symptom Inventory. A regularized partial correlation network models including ER skills and individual symptom domains were calculated. Bridge expected influence was calculated to estimate the strength of association of each ER skill with psychological symptoms. RESULTS: Only the following ER skills were most strongly related to psychological symptoms (bridge expected influence): Tolerance, Confrontation and Modification. All other ER skills were indirectly connected to symptom severity through these four skills. The strongest direct edges between ER skills and symptoms were Modification-Depression, Confrontation-Obsession-Compulsion and Tolerance-Interpersonal Sensitivity, which were significantly stronger than the vast majority of other associations between ER skills and psychological symptoms. CONCLUSIONS: These exploratory findings provide valuable targets for future studies to investigate specific associations between ER skills and psychological symptoms which could help to improve outcome monitoring and efficacy of interventions targeting ER.

15.
Asian J Psychiatr ; 101: 104211, 2024 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-39226756

RESUMEN

The affective pathway to psychosis implicates affective symptoms and neuroticism as mediating steps between childhood trauma and symptoms of schizophrenia. Prior research seldom examined the interplay between childhood trauma, resilience, personality, social functioning and symptoms in schizophrenia patients. This study recruited 290 schizophrenia patients, and constructed a regularized partial correlation network of childhood trauma, resilience, big-five personality traits, symptoms and social functioning. We further applied flow diagram and shortest path analysis to clarify how different childhood trauma types would contribute to and reach different symptoms. In the network, emotional and physical abuse showed the highest expected influence, and resilience showed the highest strength. In flow diagrams, all nodes together contributed two-thirds of variance of social functioning (which had highest predictability). Among childhood trauma types, emotional abuse contributed most to positive symptoms; physical neglect contributed most to negative, depressive and disorganized symptoms. Childhood abuse reached positive symptoms via neuroticism and depressive symptoms, yet it reached negative symptoms via physical neglect and social functioning. Childhood neglect reached positive symptoms via resilience, conscientiousness, neuroticism and depressive symptoms, yet it reached negative symptoms via social functioning. Our findings support that different childhood trauma types contribute to different symptoms, and interacts with resilience, personality and social functioning.

16.
Eur Eat Disord Rev ; 2024 Sep 04.
Artículo en Inglés | MEDLINE | ID: mdl-39229765

RESUMEN

OBJECTIVE: Motivation to change is an important predictor for treatment outcomes in individuals with anorexia nervosa (AN), however, the existence and clinical relevance of distinct motivational dimensions are understudied. This study aimed to structurally validate the AN Stage of Change Questionnaire (ANSOCQ) in the Italian adult AN population to identify separate motivational dimensions and their association with clinical variables and outcomes. METHOD: Inpatients and outpatients with AN (N = 300) completed the ANSOCQ and measures assessing eating and depressive psychopathology. Unique Variable Analysis and Exploratory Graph Analysis were employed to identify dimensions in the network structure of ANSOCQ. Cross-sectional associations with clinical variables were assessed in the whole sample. Predictive value on weight and psychopathology was assessed in inpatients. RESULTS: Two dimensions were identified, one comprising items relative to weight gain, and the second items regarding attitudes towards eating, body, and emotional problems. Feelings associated with eating resulted as most central in the network. Higher scores in the first dimension and ANSOCQ total predicted weight gain during hospitalisation. No significant predictors emerged for changes in eating psychopathology. DISCUSSION: These findings confirm the robust psychometric properties of ANSOCQ and provide support for the use of its subdimensions in clinical practice.

17.
Cerebellum ; 2024 Sep 04.
Artículo en Inglés | MEDLINE | ID: mdl-39230845

RESUMEN

Rhombencephalosynapsis (RES) is a hindbrain malformation characterized by a missing cerebellar vermis with apposition or fusion of the cerebellar hemispheres. The present clinical case report provides a comprehensive, longitudinal overview of cognitive and affective manifestations in a 22-year-old patient with RES. The patient shows clinical signs of emotional reactivity and dysregulation, impulsivity, and impairments in executive functioning since early childhood. These features fit the constellation of neuropsychiatric symptoms observed in patients with congenital and acquired abnormalities of the posterior vermis. It is proposed that patients with RES may show affective and cognitive difficulties which increase their vulnerability to psychological stress and risk of developing mental health issues.

18.
Schizophr Bull ; 2024 Sep 02.
Artículo en Inglés | MEDLINE | ID: mdl-39222718

RESUMEN

BACKGROUND AND HYPOTHESIS: Abnormal psychomotor behavior is a core schizophrenia symptom. However, assessment of motor abnormalities with expert rating scales is challenging. The Positive and Negative Syndrome Scale (PANSS) includes 3 items broadly related to hypokinetic motor behavior. Here, we tested whether a sum score of the PANSS items mannerisms and posturing (G5), motor retardation (G7), and disturbance of volition (G13) corresponds to expert ratings, potentially qualifying as a proxy-marker of motor abnormalities. STUDY DESIGN: Combining baseline datasets (n = 196) of 2 clinical trials (OCoPS-P, BrAGG-SoS), we correlated PANSS motor score (PANSSmot) and 5 motor rating scales. In addition, we tested whether the cutoff set at ≥3 on each PANSS motor item, ie, "mild" on G05, G07, and G13 (in total ≥9 on PANSSmot) would differentiate the patients into groups with high vs low scores in motor scales. We further sought for replication in an independent trial (RESIS, n = 102), tested the longitudinal stability using week 3 data of OCoPS-P (n = 75), and evaluated the validity of PANSSmot with instrumental measures of physical activity (n = 113). STUDY RESULTS: PANSSmot correlated with all motor scales (Spearman-Rho-range 0.19-0.52, all P ≤ .007). Furthermore, the cutoff set at ≥3 on each PANSS motor item was able to distinguish patients with high vs low motor scores in all motor scales except using Abnormal Involuntary Movement Scale (Mann-Whitney-U-Tests: all U ≥ 580, P ≤ .017). CONCLUSIONS: Our findings suggest that PANSSmot could be a proxy measure for hypokinetic motor abnormalities. This might help to combine large datasets from clinical trials to explore whether some interventions may hold promise to alleviate hypokinetic motor abnormalities in psychosis.

19.
J Affect Disord ; 367: 442-452, 2024 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-39243819

RESUMEN

BACKGROUND: Empirically-based developmental psychopathology approach identified three domains involved in the emergence of borderline personality disorder (BPD): i) underlying liabilities to develop psychopathology (i.e., early patterns of internalizing and externalizing manifestations); ii) invalidating relational experiences (e.g., childhood traumatic experiences, maladaptive parenting, problematic peer relationships); iii) regulatory mechanisms of emotions and behaviors. Nevertheless, no studies have quantitatively summarized empirical findings concerning how and to what extent these domains might be temporally associated to the emergence of BPD features from adolescence to adulthood. METHODS: The current multi-level meta-analysis included 106 studies (N = 86,871 participants) assessing the role of previously mentioned antecedents and risk factors for BPD. RESULTS: The analysis showed moderate effect sizes capturing temporal associations between early internalizing/externalizing psychopathological manifestations, different invalidating relational experiences, emotion/behavior regulation processes with later BPD features. The effect sizes of these domains were not statistically different from each other. CONCLUSION: This evidence supports a transactional developmental model of BPD. Consistently, the emergence of BPD could be viewed in the light of dynamic interplays between an underlying liability to psychopathology and invalidating relational experiences across different stages of development, which are progressively reinforced through increasing alterations of emotion and behavior regulation mechanisms.

20.
Assessment ; : 10731911241275327, 2024 Sep 09.
Artículo en Inglés | MEDLINE | ID: mdl-39248199

RESUMEN

Unlike depression sum scores, the underlying risk for depression is typically assumed to be normally distributed across the general population. To assess the true empirical shape of depression risk, we created a continuous-valued estimate of the latent depression density, using the Davidian-Curve Item Response Theory (DC-IRT) and the National Health and Nutrition Examination Survey (NHANES) cohorts from 2005 to 2018 (n = 36,244 on the Nine-item Patient Health Questionnaire; PHQ-9). We conducted simulations to investigate the performance of DC-IRT for large samples and realistic items. The method can recover complex latent-risk distributions even when they are not evident from sum scores. However, estimation accuracy for different sample sizes depends on the method of model selection. In addition to full-data analysis, random samples of a few thousand observations were drawn for analysis. The latent shape of depression was left-skewed and bimodal in both investigations, indicating that the latent-normality assumption does not hold for depression.

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