Study protocol for clinical trial of the FIT Families multicomponent obesity intervention for African American adolescents and their caregivers: Next step from the ORBIT initiative

INTRODUCTION

This study will test the effectiveness of FIT Families (FIT), a multicomponent family-based behavioural intervention, against a credible attention control condition, Home-Based Family Support (HBFS). This protocol paper describes the design of a randomised clinical trial testing the efficacy of the FIT intervention. The protocol will assess the efficacy of FIT to improve health status in African American adolescents with obesity (AAAO) and their primary caregivers on primary (percent body fat) and secondary (physical activity, metabolic control, weight loss) outcomes and its cost-effectiveness.

METHODS

180 youth/caregiver dyads are randomised into FIT or HBFS, stratified by age, gender and baseline per cent overweight. The proposed study follows a two condition (FIT, HBFS) by four assessment time points. Tests will be conducted to identify potential relationship of baseline demographic and clinical variables to our dependent variables and see whether they are balanced between groups. It is hypothesised that youth/caregiver dyads randomised to FIT will show significantly greater reductions in percent body fat over a 12-month follow-up period compared with AAAO receiving HBFS. Preliminary findings are expected by November 2023.

ETHICS

This protocol received IRB approval from the Medical University of South Carolina (Pro00106021; see 'MUSC IRB 106021 Main Approval.doxc' in online supplemental materials).

DISSEMINATION

Dissemination activities will include summary documents designed for distribution to the broader medical community/family audience and submission of manuscripts, based on study results, to relevant peer-reviewed scientific high-impact journals.

TRIAL REGISTRATION NUMBER

NCT04974554.

Neurophysiology of predictable unpleasant event processing in preadolescents and early adolescents, part I: Event-related potential markers of unpleasant image anticipation and processing

The ability to anticipate and process predictable unpleasant events, while also regulating emotional reactivity, is an adaptive skill. The current article and a companion in this issue test for potential changes in predictable event processing across the childhood-to-adolescence transition, a key developmental period for biological systems that support cognitive/emotional abilities. While the companion article focuses on emotion regulation and peripheral attention modulation in predictable unpleasant contexts, the current paper presents neurophysiological markers of predictable event processing itself. 315 third-, sixth-, or ninth-grade individuals saw 5-s cues predicting "scary," "every day," or uncertain image content; in this paper, cue- and picture-locked event-related potentials (ERPs) are analyzed. During the cue, early ERP positivities were increased and later slow-wave negativities were reduced when predicted content was scary as compared with mundane. After picture onset, a picture processing-related positivity was then increased for scary compared with everyday images regardless of predictability. Cue-interval data suggest enhanced processing of scary cues and reduced anticipatory processing of scary images-opposite to adults. After event onset, meanwhile, emotional ERP enhancement regardless of predictability is similar to adults and suggests that even preadolescent individuals maintain preferential engagement with unpleasant events when they are predictable.

Neurophysiology of predictable unpleasant event processing in pre-adolescents and early adolescents, part II: Reflex and event-related potential markers of defensive reactivity and peripheral attention modulation

The ability to anticipate and process predictable unpleasant events, while also regulating emotional reactivity, is an adaptive skill. The current article and a companion in this issue test for potential changes in predictable event processing across the childhood-to-adolescence transition, a key developmental period for biological systems that support cognitive/ emotional abilities. While the companion article focuses on neurophysiology of predictable event processing itself, the present article examines peripheral emotional response regulation and attention modulation that coincides with event processing. A total of 315 third-, sixth-, or ninth-grade individuals saw 5-s cues predicting "scary," "every day," or uncertain pictures, and here, blink reflexes and brain event-related potentials (ERPs) elicited by peripheral noise probes are analyzed. During the cue, blink reflexes and probe ERP (P200) amplitudes were increased when the cue predicted scary, compared to everyday, content. After picture onset, reflex enhancement by scary content then disappeared for predictable images, whereas ERP modulation was similar regardless of predictability. Patterns are similar to those in adults and suggest (1) sustained defensive response priming and enhancement of peripheral attention during aversive anticipation, and (2) an ability, even in pre-adolescents, to downregulate defensive priming while maintaining attentional modulation once an awaited predictable aversive event occurs.

Asthma is associated with bullying victimization in rural adolescents

OBJECTIVE

We characterized bullying among rural adolescents and examined the association between asthma and bullying victimization.

METHODS

Participants (N = 1905; 44.5% Black) were students attending rural high schools who were screened for a randomized trial to address uncontrolled asthma. Screening questions asked students about asthma diagnosis and symptoms, bullying victimization, and demographic characteristics. Logistic regression analyses with school as a fixed effect were employed to examine the extent to which demographic factors, asthma diagnosis, asthma status (i.e. current asthma, no asthma, possible undiagnosed asthma), and among those with current asthma, asthma severity, were associated with bullying victimization. Sensitivity analyses using bullying frequency as the outcome were also conducted.

RESULTS

26.0% reported being bullied. Younger age and self-identifying as White were associated with increased risk of bullying victimization. Compared to those with no asthma, those with current asthma or possible undiagnosed asthma were at increased risk for bullying victimization (adjusted odds ratio [AOR] = 2.46; 95% confidence interval (CI) = 1.76-3.46 and AOR = 2.42; 95% CI = 1.87-3.14, respectively). Among those with current asthma, persistent symptoms increased the risk for bullying victimization (AOR = 2.59; 95% CI = 1.45-4.71). Similar results were obtained with sensitivity analyses.

CONCLUSIONS

In a large rural community cohort, asthma was associated with bullying victimization. Findings suggest that rural students with asthma, with or without diagnosis, could benefit from schools creating inclusive environments that reduce victimization based on this medical condition. School administrators should foster environments that are accepting of all students' abilities and statuses, and healthcare providers can provide proper asthma management education to these adolescents.

Rumination as a Mediator of the Association Between Racial Discrimination and Depression Among Black Youth

BACKGROUND

Racial discrimination constitutes a significant risk factor for depressive symptoms among Black youth. Rumination, a maladaptive self-regulatory stress response, is a notable pathway by which racial discrimination contributes to depressive symptoms among racial/ethnic minority adults. Yet, examinations of the mechanistic nature of rumination in the context of racial discrimination among racial/ethnic minority youth remain limited. The present study investigated rumination as a mediator of the association between racial discrimination and depressive symptoms among Black youth.

METHODS

Data for the current study were drawn from baseline questionnaire responses of community recruited Black pre-and-early adolescents (N = 158, 53% female, Mage = 11.50) in the southeast USA participating in an ongoing longitudinal study examining the effects of interpersonal stressors on youth mental health outcomes.

RESULTS

After adjusting for age and gender, mediation analyses revealed a significant indirect effect of racial discrimination on depressive symptoms through rumination, estimate = 0.29, 95% confidence interval [0.12, 0.47]. Racial discrimination was positively associated with rumination (b = .74, SE = .23, p = .001), and rumination, in turn, was positively associated with depressive symptoms (b = .40, SE = .06, p < .001).

CONCLUSION

Consistent with previous research, we found racial discrimination to be directly and indirectly associated with depressive symptoms among Black youth. Findings provide evidence of the cognitive burden of discriminatory experiences and suggest that rumination represents a potential pathway that can be targeted at early developmental stages to reduce the deleterious impact of racism-related stressors.

Using readiness to understand implementation challenges in school mental health research

Schools and research partners are increasingly implementing complex, multicomponent interventions and school-wide frameworks to better meet students' social, emotional, behavioral, and academic needs; however, in the research and real-world contexts, implementation is often fraught with many challenges and barriers to success. This study explores implementation barriers encountered during a randomized controlled trial testing effects of one complex intervention strategy-the Interconnected Systems Framework-from the lens of a practical model for conceptualizing organizational readiness-the Interactive Systems Framework for Dissemination and Implementation. Implementation of the Interconnected Systems Framework was explored via focus group and key informant interviews with school and mental health professionals, and research team members responsible for implementing the intervention in randomly assigned study schools. Results from inductive thematic analysis of verbatim transcripts identified three primary implementation challenges: staff turnover, inadequate leadership buy-in, and insufficient time for training/planning. Each challenge is explored from interview participants' perspectives and the extant literature, then connected to recommendations from implementation science to help others avoid similar challenges in their well-intentioned efforts to address the mounting concern for students' wellbeing.

Neighborhood Disadvantage Associated With Blunted Amygdala Reactivity to Predictable and Unpredictable Threat in a Community Sample of Youth

BACKGROUND

Childhood socioeconomic disadvantage is a form of adversity associated with alterations in critical frontolimbic circuits involved in the pathophysiology of psychiatric disorders. Most work has focused on individual-level socioeconomic position, yet individuals living in deprived communities typically encounter additional environmental stressors that have unique effects on the brain and health outcomes. Notably, chronic and unpredictable stressors experienced in the everyday lives of youth living in disadvantaged neighborhoods may impact neural responsivity to uncertain threat.

METHODS

A community sample of children (N = 254) ages 8 to 15 years (mean = 12.15) completed a picture anticipation task during a functional magnetic resonance imaging scan, during which neutral and negatively valenced photos were presented in a temporally predictable or unpredictable manner. Area Deprivation Index (ADI) scores were derived from participants' home addresses as an index of relative neighborhood disadvantage. Voxelwise analyses examined interactions of ADI, valence, and predictability on neural response to picture presentation.

RESULTS

There was a significant ADI × valence interaction in the middle temporal gyrus, anterior cingulate cortex, hippocampus, and amygdala. Higher ADI was associated with less amygdala activation to negatively valenced images. ADI also interacted with predictability. Higher ADI was associated with greater activation of lingual and calcarine gyri for unpredictably presented stimuli. There was no three-way interaction of ADI, valence, and predictability.

CONCLUSIONS

Neighborhood disadvantage may impact how the brain perceives and responds to potential threats. Future longitudinal work is critical for delineating how such effects may persist across the life span and how health outcomes may be modifiable with community-based interventions and policies.

The Drug Abuse Research Training (DART) Program for Psychiatry Residents and Summer Fellows: 15-Year Outcomes

OBJECTIVE

To increase the number of physician-scientists in research, the Drug Abuse Research Training (DART) program at the Medical University of South Carolina offers a 2-year research track for psychiatry residents and a 10-week summer fellowship for students. The goal of this study was to examine program outcomes and alumni diversity levels over DART's 15-year history.

METHODS

To date, 215 trainees (44 residents, 171 summer fellows) have completed the program. An anonymous online survey was sent to the 143 program alumni with valid contact information. Survey data included demographic characteristics, post-program research involvement, and self-reported barriers to continued research engagement.

RESULTS

Overall survey completion response was 83.5% (N = 122). The alumni included 59.0% women, and 36.1% of respondents identified as a member of a minority racial/ethnic group. Following program completion, 77.0% of the alumni reported continued research involvement. More than half of the alumni reported scientific publications (57.4%) and conference presentations (63.1%) since completing DART. Among respondents who did not subsequently engage in research, the most common modifiable barriers included difficulty finding a mentor, self-perceived deficits in statistical skills and research methodology, and overall lack of confidence in research ability.

CONCLUSIONS

Over the past 15 years, the DART program has established a diverse research training program that now spans the educational spectrum from undergraduate to residency training. Future program goals include additional training to address self-reported modifiable research barriers. This program provides a model for other training programs designed to cultivate research interests and promote the diversity of clinical researchers.

The Role of Ethnic-Specific Gender Schemas in Ethnic Disparities in Adolescent Girls' Disruptive Behavior: A Preliminary Examination

African American adolescent girls have evidenced higher levels of disruptive behavior than girls from other ethnic groups. However, most research focused on understanding disparities in these outcomes has been conducted without consideration of gender or has focused exclusively on boys. Yet, prior research suggests that anger and aggression are less gender-typed in African American youth than they are among youth from other ethnic backgrounds. The purpose of this preliminary investigation was to examine the extent to which ethnic-specific gender schemas about anger mediated the relationship between ethnicity and girls' disruptive behavior. Participants were 66 middle school girls (24.1 % African American, 46.3 % European American; M_age= 12.06). They completed measures of ethnic-specific gender schemas about anger, reactive and instrumental aggression, and classroom disruptive behavior. Results indicated that relative to girls from other ethnic groups, African American girls had higher levels of reactive aggression and classroom disruptive behavior, both of which are rooted in anger. In contrast, no ethnic difference was found for instrumental aggression, which is not connected to anger. Ethnic-specific gender schemas about anger at least partially accounted for ethnic differences in reactive aggression and classroom disruptive behavior. Findings highlight the importance of examining gender schemas specific to ethnicity as factors in ethnic disparities in behavioral outcomes among adolescent girls.

Demographic differences in performance validity test failure

OBJECTIVE

The present study investigated demographic differences in performance validity test (PVT) failure in a Veteran sample.

METHOD

Data were extracted from clinical neuropsychological evaluations. Only veterans who identified as men, as either European American/White (EA) or African American/Black (AA) were included (n = 1261). We investigated whether performance on two frequently used PVTs, the Test of Memory Malingering (TOMM), and the Medical Symptom Validity Test (MSVT), differed by age, education, and race using separate logistic regressions.

RESULTS

Veterans with younger age, less education, and Veterans Affairs (VA) service-connected disability were significantly more likely to fail both PVTs. Race was not a significant predictor of MSVT failure, but AA patients were significantly more likely than EA patients to fail the TOMM. For all significant demographic predictors in the models, effects were small. In a subsample of patients who were given both PVTs (n = 461), the effects of race on performance remained.

CONCLUSIONS

Performance on the TOMM and MSVT differed by age and level of education. Performance on the TOMM differed between EA and AA patients, whereas performance on the MSVT did not. These results suggest that demographic factors may play a small but measurable role in performance on specific PVTs.

Making the "C-ACE" for a Culturally-Informed Adverse Childhood Experiences Framework to Understand the Pervasive Mental Health Impact of Racism on Black Youth

The high prevalence and psychological impact of childhood exposure to potentially traumatic events (PTE) is a major public health concern in the United States. Considerable evidence has demonstrated the significant racial disparities that exist with respect to PTE exposure, indicating that Black youth are particularly burdened by these harmful experiences. Racism may serve a unique role in explaining why Black youth are disproportionately exposed to PTEs, and why mental health disparities are more likely to occur following such experiences. Despite clear evidence acknowledging racism as a major life stressor for Black youth, theoretical models of early childhood adversity have largely neglected the multifaceted influence of racism on mental health outcomes. Inspired by bourgeoning literature highlighting the potentially traumatic nature of racism-related experiences for Black youth, we present a culturally-informed Adverse Childhood Experiences (ACEs) model, or "C-ACE", to understand the pervasive and deleterious mental health impact of racism on Black youth. This model extends the ACE framework by noting the significance of racism as an ACE exposure risk factor, a distinct ACE category, and a determinant of post-ACE mental health outcomes among Black youth. The model acknowledges and supports the advancement of ACEs research that takes a culturally informed approach to understanding the intergenerational and multilevel impact of racism on the mental health of Black youth. Future research utilizing the proposed C-ACE model is essential for informing clinical and public health initiatives centered on reducing the mental health impact of racism-related experiences and health disparities in the United States.

“If I Get Locked Up, I Get Locked Up”: Secondary Control and Adjustment among Juvenile Offenders

This study examined relations between two types of control (primary and secondary) and the psychological and community adjustment of adolescent offenders. Prior to release from confinement, 279 male adolescent offenders were interviewed about their control beliefs and a number of adjustment variables, including emotional/behavior problems, feelings of despair, expectations to avoid recontact with the law, and recognition of costs for reoffending. In addition, probation officers were interviewed regarding the participants’ adjustment to the community 8 weeks following their release and official records were searched for a 6-month period to determine the nature and timing of any reincarcerations. Secondary control was significantly associated with maladjustment for all psychological and behavioral outcomes. When predicting reincarceration, this relationship was qualified by a significant interaction with primary control, such that those who recidivated the soonest had high levels of both primary and secondary control. These data suggest that secondary control beliefs may be maladaptive among adolescent offenders, particularly when perceived primary control is high.

The pharmacology of fluparoxan: a selective alpha 2-adrenoceptor antagonist

1. This paper describes the pharmacology of the novel alpha 2-adrenoceptor antagonist fluparoxan (GR 50360) which is currently being studied clinically as a potential anti-depressant. Idazoxan and yohimbine were included in many studies for comparison. 2. In the rat isolated, field-stimulated vas deferens and the guinea-pig isolated, field-stimulated ileum preparations, fluparoxan was a reversible competitive antagonist of the inhibitory responses to the alpha 2-adrenoceptor agonist UK-14304 with pKB values of 7.87 and 7.89 respectively. In the rat isolated anococcygeus muscle, fluparoxan was a much weaker competitive antagonist of the contractile response to the alpha 1-adrenoceptor agonist phenylephrine with a pKB of 4.45 giving an alpha 2: alpha 1-adrenoceptor selectivity ratio of greater than 2500. 3. In the conscious mouse, fluparoxan (0.2-3.0 mg kg-1) was effective by the oral route and of similar potency to idazoxan in preventing clonidine-induced hypothermia and antinociception. In the rat, UK-14304-induced hypothermia (ED50 = 1.4 mg kg-1, p.o. or 0.5 mg kg-1, i.v.) and rotarod impairment (ED50 = 1.1 mg kg-1 p.o. or 1.3 mg kg-1, i.v.) were antagonized by fluparoxan. Fluparoxan, 0.67-6 mg kg-1, p.o., also prevented UK-14304-induced sedation and bradycardia in the dog. 4. In specificity studies fluparoxan had low or no affinity for a wide range of neurotransmitter receptor sites at concentrations up to at least 1 x 10(-5) M. It displayed weak affinity for 5-HT1A (pIC50 = 5.9) and 5-HT1B (pKi = 5.5) binding sites in rat brain. 5. We conclude that fluparoxan is a highly selective and potent alpha 2-adrenoceptor antagonist. The density of rat brain [3H]-dihydroalprenolol binding sites was reduced by 26% when fluparoxan was administered chronically for 6 days at a dose of 12 mg kg- 1 orally twice daily. The down-regulation of beta-adrenoceptors by fluparoxan is consistent with its antidepressant potential.

D2 dopamine receptors in rat striatum are homogeneous as revealed by ligand-binding studies

D2 dopamine receptors in rat striatum have been analysed using the binding of [3H]domperidone. Competition experiments were performed with classical dopamine antagonists and antagonists reported by other workers to discriminate D2 dopamine receptor sub-classes. In all cases competition data conformed to a single binding site interaction so that there is no evidence for heterogeneity of the D2 dopamine receptor.

Why is amitriptyline much weaker than desipramine at decreasing beta-adrenoceptor numbers?

Desipramine is consistently more effective than amitriptyline at causing beta-adrenoceptor down-regulation. Atropine, mepyramine, ketanserin, cyproheptadine and citalopram did not modify this action of desipramine in rats. Therefore inhibition of either muscarinic, histamine-H1, and 5-HT receptors or 5-HT uptake produced by amitriptyline is unlikely to account for its weaker effect on beta-adrenoceptors. A more likely explanation implicates noradrenaline uptake inhibition in vivo since amitriptyline was much weaker than desipramine and only effective after repeated dosing.