Publications by authors named "Stallings M"

Trauma-informed care (TIC) is an essential holistic framework for pediatric-focused advanced practice registered nurses (APRNs) to understand, recognize, and respond to children and families who have experienced trauma while resisting re-traumatization. TIC allows APRNs to engage with children with an understanding of how trauma impacts well-being. Universal adoption of TIC is prudent; it assumes all patients experience some degree of trauma and disclosure is limited.

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Risky sexual behavior (RSB) has been linked to externalizing problems, substance use, and, in a recent study by our lab, internalizing problems. The current study builds upon previous work investigating the relationship between RSB and internalizing problems (INT) by controlling for externalizing problems (EXT) to account for the correlation between INT and EXT. We used a twin sample from Colorado (N = 2,544) to investigate phenotypic and genetic relationships between the three latent constructs, as well as potential sex differences in those relationships.

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Externalizing behaviors encompass manifestations of risk-taking, self-regulation, aggression, sensation-/reward-seeking, and impulsivity. Externalizing research often includes substance use (SUB), substance use disorder (SUD), and other (non-SUB/SUD) "behavioral disinhibition" (BD) traits. Genome-wide and twin research have pointed to overlapping genetic architecture within and across SUB, SUD, and BD.

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Objective: Pediatric loss-of-control (LOC) eating is associated with high BMI and predicts binge-eating disorder and obesity onset with age. Research on the etiology of this common comorbidity has not explored the potential for shared genetic risk. This study examined genetic and environmental influences on LOC eating and its shared influence with BMI.

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Syphilis is an infectious disease caused by . Often known as the "great imitator," it has periods of active disease and periods of latency. Serologic syphilis testing can be divided into treponemal and non-treponemal tests, and multiple tests are required to prove infection.

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Article Synopsis
  • Externalizing behaviors include risk-taking, aggression, and impulsivity, often studied in relation to substance use (SU), substance use disorder (SUD), and behavioral disinhibition (BD).
  • Genetic research shows a significant overlap between these traits, with strong correlations among BD, SU, and SUD factors.
  • A significant portion of BD variance remains unique and separate from SU and SUD, indicating that further research is needed to understand the specific genetic underpinnings of BD.
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South Asia, making up around 25% of the world's population, encompasses a wide range of individuals with tremendous genetic and environmental diversity. This region, which spans eight countries, is home to over 4500 anthropologically defined groups that speak numerous languages and have an array of religious beliefs and cultures, making it one of the most diverse places in the world. Much of the region's rich genetic diversity and structure is the result of a complex combination of population history, migration patterns, and endogamous practices.

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Extremist far-right ideologies, including scientifically inaccurate beliefs about race, are on the rise (Mieriņa and Koroļeva 2015; Youngblood 2020); individuals perpetuating such ideologies occasionally cite genetics research, including behavioral genetics research. This highlights the need for behavioral geneticists to actively confront extremist ideology and promote anti-racism. We emphasize the need for Diversity, Equity and Inclusion (DEI) committees within behavioral genetics institutions.

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Background: The literature on the association between subjective effects (SEs; i.e., how an individual perceives their physiological and psychological reactions to a drug) and substance use disorders (SUDs) is largely limited to community samples.

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Previous research links risky sexual behavior (RSB) to externalizing problems and to substance use, but little research has been conducted on relationships between internalizing problems (INT) and RSB. The current study addresses that literature gap, using both a twin sample from Colorado (N = 2567) and a second twin sample from Minnesota (N = 1131) in attempt to replicate initial results. We explored the hypothesis that the latent variable INT would be more strongly associated with the latent variable RSB for females than for males, examining relationships between INT and RSB via phenotypic confirmatory factor analysis and multivariate twin analyses.

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Article Synopsis
  • Tobacco and alcohol use contribute significantly to global mortality rates, with heritability playing a key role in these behaviors.
  • This study utilized genetic data from a diverse population of 3.4 million individuals, including 21% non-European ancestry, to identify genetic variants linked to tobacco and alcohol use.
  • Findings showed that while increased genetic diversity improved the identification of genomic loci, polygenic risk scores were less effective across different ancestries, underscoring the need for larger and more diverse genetic datasets for better predictive outcomes.
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Estimates from genome-wide association studies (GWAS) of unrelated individuals capture effects of inherited variation (direct effects), demography (population stratification, assortative mating) and relatives (indirect genetic effects). Family-based GWAS designs can control for demographic and indirect genetic effects, but large-scale family datasets have been lacking. We combined data from 178,086 siblings from 19 cohorts to generate population (between-family) and within-sibship (within-family) GWAS estimates for 25 phenotypes.

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Article Synopsis
  • This study examined the genetic factors behind internalizing symptoms (like anxiety and depression) in children and adolescents through extensive genome-wide association studies (GWAS) across 22 groups, involving over 64,000 participants aged 3 to 18.
  • The findings showed no significant genetic markers for overall internalizing symptoms, with low heritability rates, but highlighted that self-reported symptoms had the highest genetic influences and remained consistent from childhood to adolescence.
  • The research established strong genetic links between childhood internalizing symptoms and various adult mental health issues, suggesting that understanding these genetic correlations could help explain the continuity and overlap of psychiatric problems from childhood to adulthood.
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Individual differences in music traits are heritable and correlated with the development of cognitive and communication skills, but little is known about whether diverse modes of music engagement (e.g., playing instruments vs.

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Background: Childhood maltreatment (CM), executive functions (EFs), and psychiatric disorders all correlate highly. Changes in EFs during adolescence related to CM present a possible mediating mechanism for the development of psychiatric disorders, yet no study has analyzed this longitudinally while comparing predictive capacity of different CM factor structures. We hypothesized that changes in EFs from adolescence to adulthood would mediate, in part, associations between CM, internalizing disorders (INT), and anti-social personality disorder (ASPD) while different subtypes of CM would differentially predict INT and ASPD.

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Background: Research on the influence of cannabis use on anthropometrics, cardiovascular and pulmonary function, and other indicators of physical health has reported mixed results. We examined whether cannabis frequency is associated with physical health outcomes phenotypically and after controlling for shared genetic and environmental factors via a longitudinal co-twin control design.

Methods: We tested the phenotypic associations of adolescent, young adult, and adult cannabis frequency with adult physical health.

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Article Synopsis
  • Childhood aggressive behavior (AGG) is significantly heritable, with around 50% of its variation attributed to genetics, as shown in a study analyzing data from over 87,000 children aged 1.5 to 18 years; however, no genome-wide significant SNPs were identified.* -
  • Three significant genes (ST3GAL3, PCDH7, and IPO13) linked to educational traits were found, and genetic analysis revealed moderate to strong correlations between AGG and various psychiatric traits, with notable weak correlations concerning teacher assessments.* -
  • The research also showed negative genetic correlations of aggression with cognitive abilities and age at first birth, alongside strong correlations with smoking behaviors, highlighting complex genetic interactions within childhood aggression.*
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Personality variables are associated with educational attainment and socioeconomic outcomes. In this study we incorporated a polygenic score derived from the largest genome-wide association study (GWAS) of educational attainment to date (Lee et al., 2018) into the Interactionist Model of R.

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Drug and alcohol use is associated with risky sexual behavior (RSB). It is unclear whether this association is due to correlated liabilities (e.g.

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Article Synopsis
  • The study investigates the genetic basis of cannabis use disorder, revealing a strong heritable component (50-70%) and its association with negative mental health outcomes.
  • A large-scale genome-wide association study (GWAS) was conducted using a significant sample size, identifying two important genetic loci linked to cannabis use disorder.
  • Findings suggest that while there is a genetic correlation between cannabis use and cannabis use disorder, they are genetically distinct, with cannabis use disorder being linked to other psychiatric issues like ADHD, depression, and schizophrenia.
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The multitude of gambling activities has given rise to heterogeneous ways of analyzing these behaviors and may partially underlie the lack of replication in gambling research. The current study used complementary analyses to investigate the structure, typology and etiology of gambling behaviors in a discovery sample of 2,116 twins (54.86% female; M = 24.

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Aims: To examine whether moderate adolescent cannabis use has neurocognitive effects that are unexplained by familial confounds, which prior family-controlled studies may not have identified.

Design: A quasi-experimental, sibling-comparison design was applied to a prospective, observational study of adolescents with moderate cannabis use. Participants were recruited from 2001 to 2006 (mean age = 17 years).

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We integrated genomic and bioinformatic analyses, using data from the largest genome-wide association study of cocaine dependence (CD; = 6546; 82.37% with CD; 57.39% male) and the largest postmortem gene-expression sample of individuals with cocaine use disorder (CUD; = 36; 51.

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To provide insights into the biology of opioid dependence (OD) and opioid use (i.e., exposure, OE), we completed a genome-wide analysis comparing 4503 OD cases, 4173 opioid-exposed controls, and 32,500 opioid-unexposed controls, including participants of European and African descent (EUR and AFR, respectively).

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Article Synopsis
  • Researchers analyzed data from genome-wide association studies (GWAS) to explore genetic correlations across four eating disorder types and eight substance-use-related traits, involving large sample sizes ranging from ~2400 to ~537,000 participants.
  • Findings indicated positive genetic associations between anorexia nervosa and alcohol use disorder, as well as cannabis initiation, while some negative correlations were found between anorexia without binge eating and smoking behaviors, suggesting a complex relationship between these disorders influenced by genetic and possibly depressive factors.
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