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Teaching is a demanding profession with teachers of very young children reporting high rates of stress and exhaustion. We tested the effects of a relationship-focused professional development intervention designed to enhance teachers' use of mindfulness-based strategies to support coping on trajectories of teachers' stress, exhaustion (emotional, physical, and mental), and coping. Infant and toddler teachers (N = 81) from Early Head Start (EHS) or EHS childcare partnerships (CCP) were randomized to the intervention or usual care control condition. Using ecological momentary assessment, teachers completed twice-weekly reports of stress, exhaustion, coping, and coping strategy effectiveness via smartphones for 40 weeks. Multilevel linear regression modeling, accounting for within-person repeated measures, showed no intervention effects on stress and exhaustion trajectories. Teachers in the intervention reported increased use of mindfulness-based strategies for coping over time as compared to the control group, although frequency of use peaked and then declined. While perceptions of stress and exhaustion did not change, teachers' increased use of mindfulness-based strategies suggests improvements in how teachers managed stress and exhaustion; however, the decline in use of coping suggests the need for ongoing support within the workplace.
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Fun For Wellness (FFW) is a self-efficacy theory-based online behavioral intervention that aims to promote growth in physical activity and well-being. The FFW conceptual model for the promotion of subjective well-being posits that FFW exerts both a positive direct effect, and a positive indirect effect through well-being self-efficacy, on subjective well-being. Subjective well-being is defined in FFW as an individual's satisfaction with their status in seven key domains of their life. Well-being self-efficacy is defined in FFW as the degree to which an individual perceives that they have the capability to attain a positive status in seven key domains of their life. The objective of this study was to use baseline target moderation to assess variation in the impact of FFW on subjective well-being dimensions in adults with obesity. Data (N = 667) from the Well-Being and Physical Activity Study (ClinicalTrials.gov, identifier: NCT03194854) were reanalyzed. There was evidence that well-being self-efficacy at baseline moderated the direct effect of FFW on well-being self-efficacy at 30 days post-baseline for the occupational and psychological dimensions. Both of these findings suggest a "compensatory" effect. Similarly, there was evidence that well-being self-efficacy at baseline moderated the indirect effect of FFW on subjective well-being at 60 days post-baseline through well-being self-efficacy at 30 days post-baseline for the occupational and psychological dimensions. Both of these findings suggest a "compensatory" effect. Finally, there was evidence that well-being self-efficacy at baseline moderated the direct effect of FFW on subjective well-being at 60 days post-baseline for the community, occupational, and physical dimensions. Each of these three findings suggests some version of a "rich-get-richer" effect. In summary, results provide both supportive and unsupportive (i.e., interpersonal, economic, and overall dimensions) evidence regarding variation in the impact of the FFW intervention and should impact the design of future FFW trials.
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Exercício Físico , Obesidade , Humanos , Adulto , AutoeficáciaRESUMO
The objective of this study was to improve the measurement of physical activity self-efficacy (PASE) in adults with obesity. To accomplish this objective, a latent variable approach was used to explore dimensionality, temporal invariance, and external validity of responses to a newly developed battery of PASE scales. Data (Nbaseline = 461 and N30 days postbaseline = 427) from the Well-Being and Physical Activity Study (ClinicalTrials.gov, identifier: NCT03194854), which deployed the Fun For Wellness intervention, were analyzed. A two-dimensional factor structure explained responses to each PASE scale at baseline. There was strong evidence for at least partial temporal measurement invariance for this two-dimensional structure in each PASE scale. There was mixed evidence that the effectiveness of the Fun For Wellness intervention exerted a direct effect on latent PASE in adults with obesity at 30 days postbaseline (i.e., external validity) of this two-dimensional structure.
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Exercício Físico , Autoeficácia , Adulto , Humanos , Obesidade , Psicometria , Reprodutibilidade dos TestesRESUMO
The purpose of this study was to evaluate the effectiveness of the Fun For Wellness (FFW) online intervention to increase well-being actions in adults with obesity in the United States in relatively uncontrolled settings. The FFW intervention is guided by self-efficacy theory. The study design was a large-scale, prospective, double-blind, and parallel-group randomized controlled trial. Data collection occurred at baseline, 30 days after baseline, and 60 days after baseline. Participants (N = 667) who were assigned to the FFW group (nFFW = 331) were provided with 30 days of 24-hr access to FFW. Supportive evidence was provided for the effectiveness of FFW in real-world settings to promote, either directly or indirectly, three dimensions of well-being actions: community, occupational, and psychological. This study shows that theory-based intervention may be effective in promoting well-being actions in adults with obesity in the United States.
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Intervenção Baseada em Internet , Sobrepeso , Adulto , Método Duplo-Cego , Humanos , Obesidade , Sobrepeso/terapia , Estudos ProspectivosRESUMO
Medical mistrust is an important risk factor for many health outcomes. For individuals with HIV and substance use co-morbidities, mistrust may influence engagement with health care, and affect overall health and transmission risk. Medical mistrust can be measured by an individual's mistrust of his/her physician, or mistrust of the medical system. This study examined both types of mistrust among 801 substance-using individuals with uncontrolled HIV infection. The aims were to determine how physician mistrust, medical system mistrust, and discrimination experiences were associated with engagement in HIV primary care. Findings indicated higher levels of physician mistrust, but not medical system mistrust, were associated with a longer time since the last visit to an HIV provider. Longer time since seeing an HIV care provider was associated with higher viral load. This study refines our understanding of the relationship between mistrust and HIV care engagement for a large, diverse sample of substance-using individuals.
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Infecções por HIV/psicologia , Adesão à Medicação/psicologia , Aceitação pelo Paciente de Cuidados de Saúde/psicologia , Discriminação Social , Transtornos Relacionados ao Uso de Substâncias/complicações , Confiança/psicologia , Adulto , Negro ou Afro-Americano/psicologia , Antirretrovirais/uso terapêutico , Atitude do Pessoal de Saúde , Feminino , Infecções por HIV/tratamento farmacológico , Infecções por HIV/virologia , Hispânico ou Latino/psicologia , Humanos , Masculino , Adesão à Medicação/estatística & dados numéricos , Pessoa de Meia-Idade , Aceitação pelo Paciente de Cuidados de Saúde/etnologia , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Estereotipagem , Transtornos Relacionados ao Uso de Substâncias/psicologia , Carga ViralRESUMO
BACKGROUND: Fun For Wellness (FFW) is an online behavioral intervention developed to encourage growth in well-being by providing capability-enhancing learning opportunities to participants. Self-efficacy theory guides the conceptual model underlying the FFW intervention. Some initial evidence has been provided for the efficacy of FFW to promote: well-being self-efficacy; interpersonal, community, psychological and economic subjective well-being; and, interpersonal and physical well-being actions. The purpose of this paper is to describe the protocol for a new randomized controlled trial (RCT) designed to provide the first investigation of the effectiveness of FFW to increase well-being and physical activity in adults with obesity in the United States of America. METHODS: The study design is a large-scale, prospective, parallel group RCT. Approximately 9 hundred participants will be randomly assigned to the FFW or Usual Care (UC) group to achieve a 1:1 group (i.e. , FFW: UC) assignment. Participants will be recruited through an online panel recruitment company. Data collection, including determination of eligibility, will be conducted online and enrollment is scheduled to begin on 8 August 2018. Data collection will occur at baseline, 30 days and 60 days after baseline. Instruments to measure demographic information, anthropometric characteristics, self-efficacy, physical activity and well-being will be included in the battery. Data will be modeled under an intent to treat approach and/or a complier average causal effect approach depending on the level of observed engagement with the intervention. DISCUSSION: The effectiveness trial described in this paper builds upon the 2015 FFW efficacy trial and has the potential to be important for at least three reasons. The first reason is based upon a general scientific approach that the potential utility of interventions should be evaluated under both ideal (e.g., more controlled) and real-world (e.g., less controlled) conditions. The second reason is based upon the global need for readily scalable online behavioral interventions that effectively promote physical activity in adults. The third reason is based upon the troubling global trend toward obesity along with evidence for obesity as a risk factor for several major non-communicable diseases. TRIAL REGISTRATION: ClinicalTrials.gov, identifier: NCT03194854 , registered 21 June 2017.
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Terapia Comportamental/métodos , Exercício Físico/psicologia , Promoção da Saúde/métodos , Internet , Adolescente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Avaliação de Programas e Projetos de Saúde , Estudos Prospectivos , Projetos de Pesquisa , Autoeficácia , Adulto JovemRESUMO
Using baseline data from the NIDA Clinical Trials Network 0049 study (Project HOPE), we performed latent class analyses (LCA) to identify discrete classes, or clusters, of people living with HIV (PLWH) based on their past year substance use behaviors and lifetime arrest history. We also performed multinomial logistic regressions to identify key characteristics associated with class membership. We identified 5 classes of substance users (minimal drug users, cocaine users, substantial cocaine/hazardous alcohol users, problem polysubstance users, substantial cocaine/heroin users) and 3 classes of arrest history (minimal arrests, non-drug arrests, drug-related arrests). While several demographic variables such as age and being Black or Hispanic were associated with class membership for some of the latent classes, participation in substance use treatment was the only covariate that was significantly associated with membership in all classes in both substance use and arrest history LCA models. Our analyses reveal complex patterns of behaviors among substance using PLWH and suggest that HIV intervention strategies may need to take into consideration such nuanced differences to better inform future studies and program implementation.
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Usuários de Drogas/estatística & dados numéricos , Infecções por HIV/epidemiologia , Análise de Classes Latentes , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Adulto , Feminino , Humanos , Aplicação da Lei , Modelos Logísticos , Masculino , Pessoa de Meia-IdadeRESUMO
AIMS: We aimed to identify psychosocial factors related to problem drinking among patients with poorly controlled human immunodeficiency virus (HIV) infection. SHORT SUMMARY: We aimed to identify psychosocial factors related to problem drinking among those with poorly controlled HIV infection. Increased levels of interpersonal conflict were associated with greater severity of alcohol problems. Poorer mental health, medical mistrust and less satisfaction with one's physician related to excessive drinking. METHODS: This secondary analysis used baseline data from a large multisite randomized controlled trial of substance users whose HIV infection was currently poorly controlled, from 11 urban hospitals across the USA. Participants were HIV-infected adult inpatients (n = 801; 67% male, 75% African American) with substance use histories. Participants self-reported on their drinking, perceived health, mental health, social relationships and patient-provider relationship. Structural equation models examined psychosocial factors associated with problem drinking, controlling for demographic covariates. RESULTS: Increased levels of interpersonal conflict were associated with greater severity of alcohol problems. Poorer mental health, medical mistrust and less satisfaction with one's physician were associated with excessive drinking. CONCLUSIONS: Several psychosocial factors, including interpersonal conflict, poor mental health (i.e. anxiety, depression and somatization), medical mistrust and less satisfaction with one's provider, were associated with problem drinking among HIV-infected substance users with poorly controlled HIV infection. The co-occurrence of these concerns highlights the need for comprehensive services (including attention to problem drinking, social services, mental health and quality medical care) in this at-risk group.
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Alcoolismo/psicologia , Usuários de Drogas/psicologia , Infecções por HIV/psicologia , Relações Interpessoais , Saúde Mental , Transtornos Relacionados ao Uso de Substâncias/psicologia , Adulto , Alcoolismo/epidemiologia , Feminino , Infecções por HIV/epidemiologia , Inquéritos Epidemiológicos/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Transtornos Relacionados ao Uso de Substâncias/epidemiologiaRESUMO
Hierarchical data are becoming increasingly complex, often involving more than two levels. Centering decisions in multilevel models are closely tied to substantive hypotheses and require researchers to be clear and cautious about their choices. This study investigated the implications of group mean centering (i.e., centering within context; CWC) and grand mean centering (CGM) of predictor variables in three-level contextual models. The goals were to (a) determine equivalencies in the means and variances across the centering options and (b) use the algebraic relationships between the centering choices to clarify the interpretation of the estimated parameters. We provide recommendations to assist the researcher in making centering decisions for analysis of three-level contextual models.
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Modelos Lineares , Análise Multivariada , Algoritmos , Comportamento Infantil , Pré-Escolar , Interpretação Estatística de Dados , Tomada de Decisões , Intervenção Educacional Precoce , Feminino , Humanos , Masculino , Testes Psicológicos , Comportamento SocialRESUMO
BACKGROUND: Young adult drug use and law-breaking behaviors often have roots in adolescence. These behaviors are predicted by early drug use, parental substance use disorders, and disrupted and conflict-ridden family environments. AIM: To examine long-term outcomes of Brief Strategic Family Therapy (BSFT) compared to treatment as usual (TAU) in the rates of drug use, number of arrests and externalizing behaviors in young adults who were randomized into treatment conditions as adolescents. DESIGN: 261 of 480 adolescents who had been randomized to BSFT or TAU in the BSFT effectiveness study were assessed at a single time, 3-7 years post randomization. METHODS: Assessments of drug use, externalizing behaviors, arrests and incarcerations were conducted using Timeline Follow Back, Adult Self Report, and self-report, respectively. Drug use, arrests and incarcerations were examined using negative binomial models and externalizing behaviors were examined using linear regression. RESULTS: When compared with TAU, BSFT youth reported lower incidence of lifetime (IRR = 0.68, 95%CI [0.57, 0.81]) and past year (IRR = 0.54, 95%CI [0.40, 0.71]) arrests; lower rates of lifetime (IRR = 0.63, 95%CI [0.49, 0.81]) and past year (IRR = 0.70, 95%CI [0.53, 0.92]) incarcerations; and lower scores on externalizing behaviors at follow-up (B = -0.42, SE = .15, p = .005). There were no differences in drug use. CONCLUSIONS AND SCIENTIFIC SIGNIFICANCE: BSFT may have long term effects in reducing the number of arrests, incarcerations and externalizing problems. These effects could be explained by the improvements in family functioning that occurred during the effectiveness study. This study contributes to the literature by reporting on the long term outcomes of family therapy for adolescent drug abuse.
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Transtornos de Deficit da Atenção e do Comportamento Disruptivo/psicologia , Conflito Familiar/psicologia , Terapia Familiar , Psicoterapia Breve , Transtornos Relacionados ao Uso de Substâncias/terapia , Adolescente , Transtornos de Deficit da Atenção e do Comportamento Disruptivo/complicações , Crime/estatística & dados numéricos , Estudos Transversais , Feminino , Humanos , Masculino , AutorrelatoRESUMO
The Complier Average Causal Effect (CACE) method has been increasingly used in prevention research to provide more accurate causal intervention effect estimates in the presence of noncompliance. The purpose of this study was to provide an applied demonstration of the CACE analytic approach to evaluate the relative effects of a family-based prevention intervention, Familias Unidas, in preventing/reducing illicit drug use for those participants who received the intended dosage. This study is a secondary data analysis of a randomized controlled trial designed to evaluate the relative efficacy of Familias Unidas with high-risk Hispanic youth. A total of 242 high-risk Hispanic youth aged 12-17 years and their primary caregivers were randomized to either Familias Unidas or Community Practice and assessed at baseline, 6 months and 12 months postbaseline. CACE models were estimated with a finite growth mixture model. Predictors of engagement were included in the CACE model. Findings indicate that, relative to the intent-to-treat (ITT) analytic approach, the CACE analytic approach yielded stronger intervention effects among both initially engaged and overall engaged participants. The CACE analytic approach may be particularly helpful for studies involving parent/family-centered interventions given that participants may not receive the intended dosage. Future studies should consider implementing the CACE analysis in addition to ITT analysis when examining the effects of family-based prevention programs to determine whether, and the extent to which, the CACE analysis has more power to uncover intervention effects.
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Atitude Frente a Saúde/etnologia , Terapia Familiar/organização & administração , Hispânico ou Latino/estatística & dados numéricos , Drogas Ilícitas/efeitos adversos , Assunção de Riscos , Transtornos Relacionados ao Uso de Substâncias/prevenção & controle , Adolescente , Comportamento do Adolescente , Criança , Feminino , Humanos , Masculino , Avaliação de Programas e Projetos de Saúde , Reprodutibilidade dos Testes , Medição de Risco , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Estados UnidosRESUMO
Purpose: We examined the psychometric properties and criterion validity of the Sexual Minority Adolescent Stress Inventory (SMASI) among 730 sexual minority (SM) and transgender and gender-diverse (TGD) youth aged 14 to 24 years who participated in a human immunodeficiency virus study. Methods: We tested the factor structure of the global scale and subscales and measurement invariance across age, gender identity, sex assigned at birth, sexual identity, ethnoracial identity, and city. For criterion validity, we regressed mental health and substance use measures on the global scale. Results: The global scale had excellent fit (comparative fit index = 0.95) and high reliability (omega = 0.89). Subscale model fit was adequate. We confirmed invariance by gender identity and age and established criterion validity. Conclusion: The SMASI exhibits strong psychometric properties among SM emerging adults and TGD youth. Modifications could enhance the SMASI to better capture both sexual and gender minority stress among ethnoracial minority youth.
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Physical activity promotion is a best buy for public health because it has the potential to help individuals feel better, sleep better, and perform daily tasks more easily, in addition to providing disease prevention benefits. There is strong evidence that individual-level theory-based behavioral interventions are effective for increasing physical activity levels in adult populations but causal inference from these interventions often is unclearly articulated. A directed acyclic graph (DAG) can be, but rarely is, used to determine if the causal effect of an individual-level theory-based physical activity-promoting intervention is identifiable (e.g. stripped of any spurious association). The primary objective of the current study was to demonstrate how a DAG can be used to determine if the total causal effect of an individual randomized physical activity-promoting intervention is identifiable. The demonstration was based on the Well-Being and Physical Activity study (ClinicalTrials.gov, identifier: NCT03194854). Annotated files from DAGitty and Mplus are provided.
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OBJECTIVE: Understanding the causal mechanisms through which telephone and mobile health continuing care approaches reduce alcohol use can help develop more efficient interventions that effectively target these mechanisms. Self-efficacy for successfully coping with high-risk alcohol relapse situations is a theoretically and empirically supported mediator of alcohol treatment. This secondary analysis aims to examine self-efficacy as a mechanism through which remote-delivered continuing care interventions reduce alcohol use. METHOD: The study included 262 adults (Mage = 46.9, SD = 7.4) who had completed 3 weeks of an intensive outpatient alcohol treatment program. The sample was predominantly male (71%), African American (82%), and completed a high school education (71%). The four-arm randomized clinical trial compared three active continuing care interventions (telephone monitoring and counseling [TMC], addiction comprehensive health enhancement support system [ACHESS], and combined delivery of TMC and ACHESS) to usual care and assessed longitudinal measures of alcohol use and self-efficacy. Analyses employed the potential outcomes framework and sensitivity analyses to address threats to causal inference resulting from an observed mediator variable. RESULTS: Relative to usual care, the two intervention conditions that included TMC reduced alcohol use through improvements to self-efficacy. There was no evidence that self-efficacy mediated the effect of ACHESS on alcohol use. CONCLUSIONS: Based on our findings, self-efficacy is an important mechanism through which telephone continuing care interventions affect alcohol use. Future research to identify which components of TMC influence self-efficacy and factors that mediate ACHESS effects could enhance the effectiveness of remote delivery of continuing care. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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Background: The purported benefits of online physical activity interventions, in terms of reduced costs, high reach, and easy access, may not be fully realized if participants do not engage with the programs. However, there is a lack of research on modifiable predictors (e.g., beliefs) of engagement with online physical activity interventions. The objective of this brief report was to investigate if self-efficacy to engage at baseline predicted subsequent engagement behavior in an online physical activity intervention at post-baseline. Methods: Data (N = 331) from the 2018 Fun For Wellness effectiveness trial (ClinicalTrials.gov, identifier: NCT03194854) were analyzed in this brief report. Multiple logistic regression was fit in Mplus 8 using maximum-likelihood estimation. Results: There was evidence that self-efficacy to engage beliefs at baseline positively predicted subsequent engagement behavior in the Fun For Wellness intervention at 30 days post-baseline. Conclusions: Some recommendations to increase self-efficacy to engage in future online physical activity intervention studies were provided consistent with self-efficacy theory.
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OBJECTIVE: Youth in the legal system are vulnerable to initiation and escalation of opioid use. The transition period during which a young person is released from the institutional setting to the community is a critical window of opportunity for preventive intervention targeting the uptake and intensification of opioid and other drug use. Adaptive preventive interventions are a promising approach to systematically varying the timing and intensity of substance use preventive interventions for these youth. METHOD: This pilot study of 30 youth (97% young men; 37% White; Mage = 18.34, SD = 1.84) examined the feasibility and acceptability of adaptive and nonadaptive preventive interventions that incorporate components of the Adolescent Community Reinforcement Approach with Assertive Continuing Care, Trauma Affect Regulation: Guide for Education and Treatment, and Motivational Interviewing using the Sequential Multiple Assignment Randomized Trial study design. Participants completed assessments at baseline, 1-month postrelease, and 2-months postrelease. RESULTS: Enrollment rate was 65%. Nearly three-quarters (73%) of enrolled youth had substance use disorder at intake. Moreover, 60% of enrolled participants completed the 2-month postrelease follow-up assessment. Participants reported high satisfaction with the interventionist interactions, and 95% indicated they would recommend the program to other youth. The pilot study revealed the need for several adaptations to study and intervention protocols. CONCLUSIONS: This pilot study provides evidence of the feasibility of a research-practice partnership with state juvenile rehabilitation facilities, successful recruitment of youth involved in the legal system, and feasibility and acceptability of adaptive preventive interventions spanning pre- and post-release for legal system-involved youth. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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The primary purpose of this study is to provide an overview of multilevel modeling for Psychosomatic Medicine readers and contributors. The article begins with a general introduction to multilevel modeling. Multilevel regression modeling at two levels is emphasized because of its prevalence in psychosomatic medicine research. Simulated data sets based on some core ideas from the Familias Unidas effectiveness study are used to illustrate key concepts including communication of model specification, parameter interpretation, sample size and power, and missing data. Input and key output files from Mplus and SAS are provided. A cluster randomized trial with repeated measures (i.e., three-level regression model) is then briefly presented with simulated data based on some core ideas from a cognitive-behavioral stress management intervention in prostate cancer.
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Modelos Estatísticos , Análise Multinível/métodos , Medicina Psicossomática/estatística & dados numéricos , Pesquisa/estatística & dados numéricos , Aculturação , Adolescente , Viés , Comunicação , Estudos Transversais , Educação , Relações Familiares/etnologia , Infecções por HIV/epidemiologia , Infecções por HIV/etnologia , Infecções por HIV/prevenção & controle , Infecções por HIV/psicologia , Hispânico ou Latino/psicologia , Hispânico ou Latino/estatística & dados numéricos , Humanos , Computação Matemática , Ensaios Clínicos Controlados Aleatórios como Assunto , Análise de Regressão , Tamanho da Amostra , Parceiros Sexuais/psicologia , Software , Estados Unidos , Sexo sem Proteção/etnologia , Sexo sem Proteção/prevenção & controle , Sexo sem Proteção/psicologia , Adulto JovemRESUMO
This study examined cutoff scores on the new (2014) US-AUDIT (Alcohol Use Disorders Identification Test), adapted for U.S. standard drinks. No studies have examined optimal cutoff scores on the US-AUDIT for college students. 250 undergraduates (65% men) completed the US-AUDIT. At-risk drinkers reported at least four binge drinking episodes per week. Likely alcohol use disorder was assessed with a self-report diagnostic measure. Using the Youden method, the ideal cutoff to identify at-risk drinkers for the US-AUDIT was 5 for men (sensitivity = .93, specificity = .96) and 6 for women (sensitivity = .77, specificity = .86); and to identify likely alcohol use disorder was 13 for men (sensitivity = .69, specificity = .81) and 8 for women (sensitivity = .83, specificity = .80). Cutoffs were lower than the original AUDIT. Different US-AUDIT cutoffs for men and women should be used for likely alcohol use disorder, which may reflect differences in drinking quantity and frequency. Empirical guidelines for alcohol screening with the new US-AUDIT may be used to enhance research or identification of at-risk drinkers in college settings, or for college students in primary care or other health care settings.
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For the past 30 years, scholars across the fields of epidemiology, education, psychology, and numerous other fields have worked to develop interventions designed to reduce risk and enhance protection to prevent mental, emotional, and behavioral problems across the lifespan. This article presents a series of next steps that leverage this foundational science to inform the development of adaptive preventive interventions. Adaptive preventive interventions (APIs) tailor the intervention to fit the diverse, sometimes changing, needs of participants with the goal of better prevention outcomes for more individuals. Secondary analyses of data from preventive intervention trials to identify moderators, mediators, and antecedents of attrition and intervention failure can be useful for designing effective APIs. Moderators that identify intervention effect heterogeneity can be used within an API to tailor the intervention to meet the unique needs of important participant subgroups. Mediators and predictors of disengagement and attrition can be helpful tailoring variables in an API to trigger change to the intervention. Preventive intervention trials that incorporate frequent assessment of potential mediators, moderators, and antecedents of attrition during the intervention period are needed. Secondary analyses of data from preventive intervention trials provide an important foundation for next-generation APIs.
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BACKGROUND: Sedentary behaviors, including screen-based activities, are associated with obesity, cardiovascular, and mental health risks. In the US, minority and socioeconomically disadvantaged youth engage in substantial sedentariness, requiring targeted interventions. Familias Unidas for Health and Wellness (FUHW) is a family intervention to reduce risks among Hispanic youth with overweight and obesity. Analyses examined (1) FUHW's impact on parent and adolescent screen-based sedentary behavior and (2) differential intervention effects by adolescent gender, internalizing symptoms, and body mass index. METHODS: A total of 280 overweight/obese Hispanic middle schoolers and parents were randomized to FUHW or control and assessed at baseline, 6, 12, and 24 months between 2015 and 2019. RESULTS: Linear growth models showed that exposure to FUHW was not associated with parent sedentary behavior over time (b = -0.11, P = .32) but was associated with decreases in adolescent sedentary behavior (b = -0.27, P = .03). Neither gender nor internalizing symptoms moderated intervention effects, but there were differential effects by body mass index. Compared to controls, FUHW showed significant decreases in sedentary behavior among overweight (b = -0.85, P < .01) and obese (b = -0.79, P < .01) youth but not severely obese youth. CONCLUSIONS: FUHW reduced youth screen-based sedentary behavior. Youth with severe obesity require additional intervention.