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1.
Early Child Educ J ; 52(2): 243-257, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-39092205

RESUMO

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.

2.
Prev Sci ; 24(2): 204-213, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-33880691

RESUMO

Family-based preventive interventions have been found to prevent youth internalizing symptoms, yet they operate through diverse mechanisms with heterogeneous effects for different youth. To better target preventive interventions, this study examines the effects of the Familias Unidas preventive intervention on reducing internalizing symptoms with a universal sample of Hispanic youth in a real-world school setting (i.e., effectiveness trial). The study utilizes emerging methods in baseline target moderated mediation (BTMM) to determine whether the intervention reduces internalizing symptoms through its impact on three distinct mechanisms: family functioning, parent stress, and social support for parents. Data are from a randomized controlled effectiveness trial of 746 Hispanic eighth graders and their parents assessed at baseline, 6-, 18-, and 30-month post-baseline. BTMM models examined three moderated mechanisms through which the intervention might influence 30-month adolescent internalizing symptoms. The intervention decreased youth internalizing symptoms through improvements in family functioning in some models, but there was no evidence of moderation by baseline level of family functioning. There was some evidence of mediation through increasing social support for parents for those intervention parents presenting with lower baseline support. However, there was no evidence of mediation through parent stress. Post hoc analyses suggest a possible cascading of effects where improvements in support for parents strengthened parental monitoring of youth and ultimately reduced youth internalizing symptoms. Findings support the intervention's effects on internalizing symptoms in a universal, real-world setting, and the value of BTMM methods to improve the targeting of preventive interventions. ClinicalTrials.gov Identifier: NCTO1038206, First Posted: December 23, 2009.


Assuntos
Hispânico ou Latino , Pais , Humanos , Adolescente , Apoio Social
3.
Prev Sci ; 24(2): 286-298, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-34173135

RESUMO

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.


Assuntos
Exercício Físico , Obesidade , Humanos , Adulto , Autoeficácia
4.
Prev Sci ; 24(2): 249-258, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36626022

RESUMO

To understand which families are likely to benefit most from resource-intensive family-based, evidence-based interventions (EBIs), we must examine the key, modifiable determinant of family functioning. The purpose of this study was to (1) identify whether there are subgroups of Hispanic parents that differ meaningfully based on their family functioning at baseline, (2) test whether the Familias Unidas preventive intervention was differentially effective across the baseline family functioning subgroups, and (3) understand the mechanisms of intervention effectiveness within each baseline family functioning subgroup. On a pooled data set of 4 completed efficacy and effectiveness trials of Familias Unidas (n = 1445 low-income, Hispanic immigrant origin, parents and their adolescent between the ages of 12-17), we conducted a series of secondary data analyses. Latent profile analyses revealed four significantly different profiles: (1) low family functioning (n = 210, 14.55%), (2) low-to-moderate family functioning (n = 554, 38.39%), (3) moderate-to-high family functioning (n = 490, 33.96%), and (4) high family functioning (n = 189, 13.10%). A structural equation modeling approach found there were significant differences in intervention effectiveness between the subgroups. The low family functioning subgroup experienced gains in family functioning, and in turn, lower levels of adolescent substance use, internalizing, and externalizing symptoms. The high family functioning subgroup showed significant direct effects of the intervention on adolescent substance use, internalizing, and externalizing symptoms, but no indirect effects through improvements in family functioning. Implications for screening, targeting, and adapting interventions are discussed.


Assuntos
Infecções por HIV , Transtornos Relacionados ao Uso de Substâncias , Humanos , Adolescente , Criança , Pais , Sexo sem Proteção/prevenção & controle , Hispânico ou Latino , Transtornos Relacionados ao Uso de Substâncias/prevenção & controle , Infecções por HIV/prevenção & controle
5.
Early Educ Dev ; 34(7): 1545-1564, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37849911

RESUMO

This study described infant/toddler teachers' (N = 106) perceptions of stress intensity and exhaustion (emotional, physical, mental) intensity. We examined the associations between stress and exhaustion and teachers' reports of stress sources and coping strategy use. Using ecological momentary assessment (EMA), teachers from Early Head Start (EHS), EHS childcare-partnerships, or independent childcare programs (midwestern U.S.) completed twice-weekly reports of: stress and exhaustion intensity; stress sources (workload, children's behaviors, personal life); and, coping strategies (support from colleagues, distraction, mindfulness techniques, reframing). Research Findings: Stress and exhaustion reports were similar to studies of preschool teachers. Workload and personal life stressors were associated with stress and all exhaustion types. Teachers used fewer than two different coping strategies/per reporting day. Only reframing was negatively associated with stress and emotional exhaustion. Teachers reported greater stress at end-of-week than beginning-of-week. Older teachers reported greater stress and emotional exhaustion. Although one-third of teachers reported ≥4 ACEs, early adversity was not associated with stress or exhaustion. Practice or Policy: We discuss the results relative to the sparse literature on infant/toddler teachers' well-being and suggest areas for professional development supports while underscoring the need for EHS federal policy makers and program administrators to consider how to reduce/streamline workload.

6.
J Sport Exerc Psychol ; 43(6): 497-513, 2021 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-34794118

RESUMO

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.


Assuntos
Exercício Físico , Autoeficácia , Adulto , Humanos , Obesidade , Psicometria , Reprodutibilidade dos Testes
7.
J Sport Exerc Psychol ; 43(1): 83-96, 2020 Dec 17.
Artigo em Inglês | MEDLINE | ID: mdl-33333492

RESUMO

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.


Assuntos
Intervenção Baseada em Internet , Sobrepeso , Adulto , Método Duplo-Cego , Humanos , Obesidade , Sobrepeso/terapia , Estudos Prospectivos
8.
AIDS Behav ; 23(10): 2859-2869, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-30879211

RESUMO

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.


Assuntos
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 Viral
9.
BMC Public Health ; 19(1): 737, 2019 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-31196052

RESUMO

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.


Assuntos
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 Jovem
10.
J Adolesc ; 72: 91-100, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30877842

RESUMO

INTRODUCTION: The pervasive use of technology has raised concerns about its association with adolescent mental health, including internalizing symptoms. Existing studies have not always had consistent findings. Longitudinal research with diverse subgroups is needed. METHODS: This study examines the relationship between screen-based sedentary (SBS) behaviors and internalizing symptoms among 370 Hispanic adolescents living in Miami, Florida- United States, who were followed for 2 ½ years and assessed at baseline, 6, 18 and 30 months post-baseline between the years 2010 and 2014. Approximately 48% were girls, and 44% were foreign-born, most of these youth being from Cuba. Mean age at baseline was 13.4 years, while at the last time-point it was 15.9 years. RESULTS: Findings show that girls had higher internalizing symptoms and different patterns of screen use compared to boys, including higher phone, email, and text use. SBS behaviors and internalizing symptoms cooccurred at each time-point, and their trajectories were significantly related (r = 0.45, p < .001). Cross-lagged panel analyses found that SBS behaviors were not associated with subsequent internalizing symptoms. Among girls, however, internalizing symptoms were associated with subsequent SBS behaviors during later adolescence, with internalizing symptoms at the 18-month assessment (almost 15 years old) associated with subsequent SBS behaviors at the 30-month assessment (almost 16 years old; ß = 0.20, p < .01). CONCLUSIONS: Continued research and monitoring of internalizing symptoms and screen use among adolescents is important, especially among girls. This includes assessments that capture quantity, context, and content of screen time.


Assuntos
Mecanismos de Defesa , Tempo de Tela , Comportamento Sedentário , Adolescente , Comportamento do Adolescente , Feminino , Florida , Hispânico ou Latino/psicologia , Humanos , Estudos Longitudinais , Masculino , Estados Unidos
11.
AIDS Behav ; 22(9): 2757-2765, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29305761

RESUMO

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.


Assuntos
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-Idade
12.
Alcohol Alcohol ; 53(5): 603-610, 2018 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-29596589

RESUMO

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.


Assuntos
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/epidemiologia
13.
Prev Sci ; 19(Suppl 1): 49-59, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-27318951

RESUMO

Prevention programs that strengthen parenting and family functioning have been found to reduce poor behavioral outcomes in adolescents, including substance use, HIV risk, externalizing and internalizing problems. However, there is evidence that not all youth benefit similarly from these programs. Familias Unidas is a family-focused intervention designed to prevent substance use and sexual risk among Hispanic youth and has recently demonstrated unanticipated reductions in internalizing symptoms for some youth. This paper examines variation in intervention response for internalizing symptoms using individual-level data pooled across four distinct Familias Unidas trials: (1) 266 eighth grade students recruited from the general school population; (2) 160 ninth grade students from the general school population; (3) 213 adolescents with conduct, aggression, and/or attention problems; and (4) 242 adolescents with a delinquency history. Causal inference growth mixture modeling suggests a three-class model. The two largest classes represent youth with low (60 %) and medium (27 %) internalizing symptoms at baseline, and both intervention and control participants show reductions in internalizing symptoms. The third class (13 %) represents youth with high levels of baseline internalizing symptoms who remain at steady levels of internalizing symptoms when exposed to the intervention, but who experience an increase in symptoms under the control condition. Female gender, low baseline levels of parent-adolescent communication, and older age were associated with membership in the high-risk class. These synthesis analyses involving a large sample of youth with varying initial risk levels represent a further step toward strengthening our knowledge of preventive intervention response and improving preventive interventions.


Assuntos
Ansiedade/prevenção & controle , Depressão/prevenção & controle , Promoção da Saúde , Hispânico ou Latino/psicologia , Poder Familiar , Avaliação de Programas e Projetos de Saúde , Adolescente , Transtorno da Conduta/prevenção & controle , Feminino , Humanos , Delinquência Juvenil/prevenção & controle , Masculino , Serviços Preventivos de Saúde
14.
Prev Sci ; 19(Suppl 1): 74-94, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-28013420

RESUMO

This paper presents the first findings of an integrative data analysis of individual-level data from 19 adolescent depression prevention trials (n = 5210) involving nine distinct interventions across 2 years post-randomization. In separate papers, several interventions have been found to decrease the risk of depressive disorders or elevated depressive/internalizing symptoms among youth. One type of intervention specifically targets youth without a depressive disorder who are at risk due to elevated depressive symptoms and/or having a parent with a depressive disorder. A second type of intervention targets two broad domains: prevention of problem behaviors, which we define as drug use/abuse, sexual risk behaviors, conduct disorder, or other externalizing problems, and general mental health. Most of these latter interventions improve parenting or family factors. We examined the shared and unique effects of these interventions by level of baseline youth depressive symptoms, sociodemographic characteristics of the youth (age, sex, parent education, and family income), type of intervention, and mode of intervention delivery to the youth, parent(s), or both. We harmonized eight different measures of depression utilized across these trials and used growth models to evaluate intervention impact over 2 years. We found a significant overall effect of these interventions on reducing depressive symptoms over 2 years and a stronger impact among those interventions that targeted depression specifically rather than problem behaviors or general mental health, especially when baseline symptoms were high. Implications for improving population-level impact are discussed.


Assuntos
Depressão/prevenção & controle , Promoção da Saúde , Adolescente , Terapia Cognitivo-Comportamental , Análise de Dados , Depressão/fisiopatologia , Feminino , Humanos , Masculino , Avaliação de Resultados em Cuidados de Saúde , Poder Familiar , Pais/educação
15.
Prev Sci ; 19(Suppl 1): 60-73, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-28434055

RESUMO

Integrative Data Analysis (IDA) encompasses a collection of methods for data synthesis that pools participant-level data across multiple studies. Compared with single-study analyses, IDA provides larger sample sizes, better representation of participant characteristics, and often increased statistical power. Many of the methods currently available for IDA have focused on examining developmental changes using longitudinal observational studies employing different measures across time and study. However, IDA can also be useful in synthesizing across multiple randomized clinical trials to improve our understanding of the comprehensive effectiveness of interventions, as well as mediators and moderators of those effects. The pooling of data from randomized clinical trials presents a number of methodological challenges, and we discuss ways to examine potential threats to internal and external validity. Using as an illustration a synthesis of 19 randomized clinical trials on the prevention of adolescent depression, we articulate IDA methods that can be used to minimize threats to internal validity, including (1) heterogeneity in the outcome measures across trials, (2) heterogeneity in the follow-up assessments across trials, (3) heterogeneity in the sample characteristics across trials, (4) heterogeneity in the comparison conditions across trials, and (5) heterogeneity in the impact trajectories. We also demonstrate a technique for minimizing threats to external validity in synthesis analysis that may result from non-availability of some trial datasets. The proposed methods rely heavily on latent variable modeling extensions of the latent growth curve model, as well as missing data procedures. The goal is to provide strategies for researchers considering IDA.


Assuntos
Análise de Dados , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos de Validação como Assunto , Adolescente , Viés , Depressão , Humanos , Estudos Longitudinais
16.
Multivariate Behav Res ; 52(2): 149-163, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-27925836

RESUMO

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.


Assuntos
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 Social
17.
Prev Sci ; 17(5): 595-605, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-27154768

RESUMO

Familias Unidas is a family-focused preventive intervention that has been found to reduce drug use and sexual risk behaviors among Hispanic adolescents. In some trials, Familias Unidas has also been found to be efficacious in reducing adolescent internalizing symptoms (i.e., depressive and anxiety symptoms), even though the intervention did not specifically target internalizing symptoms. This study examines potential mediators or mechanisms by which Familias Unidas influences internalizing symptoms, specifically the role of intervention-targeted improvements in parent-adolescent communication and reductions in youth externalizing behaviors. A total of 213 Hispanic eighth grade students with a history of externalizing behavior problems and their primary caregivers were recruited from the public school system. Participants, with a mean age of 13.8 years, were randomized into the Familias Unidas intervention or community practice control condition and assessed at baseline, 6, 18, and 30 months post-baseline. A cascading mediation model was tested in which the Familias Unidas intervention was hypothesized to decrease adolescent internalizing symptoms through two mediators: improvements in parent-adolescent communication leading to decreases in externalizing behaviors. Findings show that the intervention had significant direct effects on youth internalizing symptoms at 30 months post-baseline. In addition, the cascading mediation model was supported in which the Familias Unidas intervention predicted significant improvements in parent-adolescent communication at 6 months, subsequently decreasing externalizing behaviors at 18 months, and ultimately reducing youth internalizing symptoms at 30 months post-baseline. Implications for prevention interventions are discussed.


Assuntos
Hispânico ou Latino , Relações Pais-Filho , Transtornos Relacionados ao Uso de Substâncias/prevenção & controle , Adolescente , Adulto , Feminino , Florida , Humanos , Masculino , Pessoa de Meia-Idade , Medição de Risco
18.
Fam Process ; 55(1): 91-106, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25683164

RESUMO

Familias Unidas is an intervention that has been found to be efficacious in preventing and reducing substance use, sexual risk, and problem behaviors among Hispanic youth. While it does not specifically target youth internalizing symptoms, the intervention works to strengthen parenting and family factors associated with reduced risk of internalizing symptoms (i.e., depression, anxiety symptoms). This study examines the effects of Familias Unidas on internalizing symptoms among high-risk youth, as well as the role of family level factors in the intervention's effects. A total of 242 12-17-year-old Hispanic youth with a history of delinquency and their primary caregivers were recruited from the school and juvenile justice systems, and randomly assigned to the Familias Unidas intervention or community practice control. A linear latent growth model was used to examine intervention effects on the trajectory of adolescent internalizing symptoms from baseline to 6 and 12 months post-baseline. Results show that the Familias Unidas intervention was more efficacious than control in reducing youth internalizing symptoms. Baseline youth externalizing and internalizing symptoms did not moderate the intervention's effects on the trajectory of youth internalizing symptoms. While parent-adolescent communication did not significantly moderate the intervention's effects, changes in parent-adolescent communication mediated the intervention's effects on internalizing symptoms, showing stronger intervention effects for youth starting with poorer communication. Findings indicate that the Familias Unidas intervention can reduce internalizing symptoms among high-risk Hispanic youth, and that improving parent-youth communication, a protective family factor, may be one of the mechanisms by which the intervention influences youth internalizing symptoms.


Assuntos
Ansiedade/prevenção & controle , Comunicação , Depressão/prevenção & controle , Terapia Familiar/métodos , Hispânico ou Latino/psicologia , Delinquência Juvenil , Adolescente , Criança , Depressão/psicologia , Feminino , Humanos , Masculino , Relações Pais-Filho , Transtornos Relacionados ao Uso de Substâncias/prevenção & controle , Sexo sem Proteção/prevenção & controle
19.
Stat Med ; 34(26): 3399-414, 2015 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-26095855

RESUMO

There are many advantages to individual participant data meta-analysis for combining data from multiple studies. These advantages include greater power to detect effects, increased sample heterogeneity, and the ability to perform more sophisticated analyses than meta-analyses that rely on published results. However, a fundamental challenge is that it is unlikely that variables of interest are measured the same way in all of the studies to be combined. We propose that this situation can be viewed as a missing data problem in which some outcomes are entirely missing within some trials and use multiple imputation to fill in missing measurements. We apply our method to five longitudinal adolescent depression trials where four studies used one depression measure and the fifth study used a different depression measure. None of the five studies contained both depression measures. We describe a multiple imputation approach for filling in missing depression measures that makes use of external calibration studies in which both depression measures were used. We discuss some practical issues in developing the imputation model including taking into account treatment group and study. We present diagnostics for checking the fit of the imputation model and investigate whether external information is appropriately incorporated into the imputed values.


Assuntos
Antidepressivos de Segunda Geração/uso terapêutico , Depressão/tratamento farmacológico , Fluoxetina/uso terapêutico , Metanálise como Assunto , Modelos Estatísticos , Adolescente , Calibragem , Criança , Feminino , Humanos , Estudos Longitudinais , Masculino , Psicologia do Adolescente , Ensaios Clínicos Controlados Aleatórios como Assunto , Projetos de Pesquisa , Resultado do Tratamento
20.
Am J Addict ; 24(7): 637-45, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26359441

RESUMO

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.


Assuntos
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 , Autorrelato
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