Change in Body Mass Index in Youth in the First 5 Years After Type 1 Diabetes Mellitus Diagnosis.

OBJECTIVE: Examine body mass index (BMI) trajectories in American youth with type 1 diabetes (T1D) over the first 5 years following diagnosis. METHODS: Retrospective record review of BMI trajectories in youth with T1D diagnosed in 2015 to 2016. RESULTS: Near the time of diabetes diagnosis, 35.5% of youth had BMIs in the overweight/obesity range. These rates increased over time (P < .001), with 52.8% having overweight/obesity 5 years after diagnosis. Average age when BMI rose from healthy to overweight/obese or overweight to obese (rise group) was at 12.7 years, occurring 2.5 years after diagnosis. There were no differences between hemoglobin A1c, use of continuous glucose monitors, or use of insulin pumps between the rise group and those with healthy BMI throughout the study period. CONCLUSIONS: Alarmingly high rates of overweight/obesity in youth were observed within 5 years following T1D diagnosis. Awareness and further research are necessary to address this independent risk factor for morbidities.

Profiles of disordered eating behaviour in type 1 diabetes using the DEPS-R and behaviour and glycaemic outcomes in a real-life setting.

AIMS: The Diabetes Eating Problems Survey - Revised (DEPS-R) is commonly used to assess disordered eating behaviour (DEB) in individuals with type 1 diabetes and has advantages compared to other measures not specifically tailored to diabetes. A score ≥20 on the DEPS-R is used to indicate clinically significant DEB; however, it does not distinguish between eating disorder (ED) phenotypes necessary to guide treatment decisions, limiting clinical utility. METHODS: The current study used latent class analysis to identify distinct person-centred profiles of DEB in adults with type 1 diabetes using the DEPS-R. Analysis of Variance with Games Howell post-hoc comparisons was then conducted to examine the correspondence between the profiles and binge eating, insulin restriction and glycaemic control (HbA1c, mean blood glucose, and percent time spent in hyperglycaemia) during 3 days of assessment in a real-life setting. RESULTS: Latent class analysis indicated a 4-class solution, with patterns of item endorsement suggesting the following profiles: Bulimia, Binge Eating, Overeating and Low Pathology. Differences in binge eating, insulin restriction and glycaemic control were observed between profiles during 3 days of at-home assessment. The Bulimia profile was associated with highest HbA1c and 3-day mean blood glucose. CONCLUSIONS: There are common patterns of responses on the DEPS-R that appear to reflect different ED phenotypes. Profiles based on the DEPS-R corresponded with behaviour in the real-life setting as expected and were associated with different glycaemic outcomes. Results may have implications for the use of the DEPS-R in research and clinical settings.

Adolescent Females' Dyadic Conversations About Body, Weight, and Appearance.

Body talk among adolescent females has been associated with negative outcomes, including depressed mood, disordered eating, and body dissatisfaction. Yet, little work has investigated the manifestation of body talk in actual conversations between adolescent females or explored pathways through which body talk is spread (e.g., co-rumination). The present study examined body talk among adolescent female dyads (N = 23 dyads) ages 13 to 17 (Mage = 15.12) using an observational design. Reciprocally nominated dyads were recruited from a high school in the southeastern United States. Conversations between dyads were qualitatively coded using an applied thematic analysis approach. Identified themes were related to weight, appearance, and personality. Results provide insight into the social context in which sociocultural norms of weight stigma, body dissatisfaction, and eating-related psychopathology may be reinforced. Findings have implications for informing the development of interventions to reduce co-rumination of negative weight- and appearance-related body talk and to promote positive body image and healthy weight among adolescent girls.

Leveraging seasonality and timing to optimize pediatric weight management interventions: Novel directions for future research.

National estimates suggest that more than 35% of American children, ages 2-19 years, are overweight or obese, which increases their risk for weight-related comorbidities including diabetes, cancer, cardiovascular disease risk factors, depression, and anxiety. While obesity prevention is most cost-effective, for youth with existing obesity, the United States Preventive Services Task Force recommends ≥26 h of comprehensive lifestyle intervention over 6-12 months. This include standard behavioral therapy, dietary counseling, and an emphasis on physical activity. Although such programs are effective in reducing weight status, there are many barriers to completing these programs. A novel consideration for both the prevention and treatment of childhood obesity is the recognition that the timing of intervention, both duration and time of the year, can impact family engagement and intervention effectiveness. This paper discusses the potential of targeting high-risk periods for weight gain and offering brief behavioral intervention, in hopes of inspiring research on novel approaches to the prevention and treatment of childhood obesity.

Referral to Adolescent Weight Management Interventions: Qualitative Perspectives From Providers.

OBJECTIVE: Current guidelines for treatment of obesity in adolescence include screening and referring youth with obesity to appropriate weight management (WM) care. However, prior work has not explored the referral process to adolescent WM programs, especially for youth from lower-income backgrounds, who are at increased risk of obesity and related negative health outcomes. This qualitative study sought to understand pediatricians' current practices regarding referrals to adolescent WM interventions with a focus on adolescents from lower-income backgrounds. METHODS: Individual interviews were conducted with 11 medical providers that had referred at least 5 adolescents from low-income backgrounds to WM interventions. Applied thematic analysis was used for data analysis. RESULTS: Identified themes included weight-related discussions with adolescents as potentially fraught, as providers want to address weight-related health concerns while being thoughtful about potential harm. Providers also noted varied factors affecting their decision to refer to WM programs, including health implications, perceived motivation of the patient and family, and availability of programs. Providers identified that many families experience shame or guilt around referral to WM. Few themes were identified regarding impact of income on weight-related conversations with adolescents. CONCLUSION: Findings were novel in regard to discussions of weight in adolescents with obesity leading to WM referral. Despite being a primary focus of the present study, few themes were identified regarding specific considerations for adolescents from low-income backgrounds. Future clinical research should focus on provider-focused interventions to increase sensitivity regarding weight-related discussions and attention to diversity, equity, and inclusion.

Formative Development of a Weight Management Intervention for Adolescents with Type 1 Diabetes Mellitus and Obesity.

The prevalence of overweight and obesity in youth with type 1 diabetes mellitus (T1D) now exceeds that of youth without T1D. Comorbid T1D and excess adiposity are associated with multiple serious negative health outcomes. Unfortunately, youth with T1D are often excluded from and/or not referred to standard behavioral lifestyle interventions. This is often attributed to the complexities of managing T1D and an effort not to overburden persons who have T1D. Furthermore, standard behavioral weight management intervention recommendations can be perceived as contradicting T1D disease management (e.g., removing sugar-sweetened beverages from diet, energy balance with exercise, and caloric restriction). A weight management intervention specifically designed for youth with T1D is needed to provide treatment to youth with comorbid T1D and overweight/obesity. The current study interviewed adolescents with T1D and overweight/obesity (n = 12), their caregivers (n = 12), and pediatric endocrinologists (n = 9) to understand (a) whether they would be interested in a weight management intervention adapted for youth with T1D and (b) specific adaptations they would want and need. Five central themes emerged following applied thematic analysis: (1) program content, (2) programmatic messaging, (3) program structure, (4) social support, and (5) eating disorder risk. Results provide detailed recommendations for the adaptation of a behavioral weight management intervention for youth with T1D.

Weight Management Engagement for Teens From Low-Income Backgrounds: Qualitative Perspectives From Adolescents and Caregivers.

OBJECTIVE: Adolescents from low-income backgrounds are at increased risk for obesity and related negative health outcomes. Furthermore, these adolescents have less access to, and success in, weight management (WM) programs. This qualitative study sought to better understand engagement in a hospital-based WM program from the perspective of adolescents and caregivers at different levels of program initiation and engagement. METHODS: Qualitative interviews were conducted with 55 participants (29 adolescents and 26 caregivers). This included: (a) those that were referred to, but never initiated, WM treatment (non-initiators); (b) those that prematurely disengaged from treatment (drop-outs); and (c) those that had ongoing participation in treatment (engaged). Data were analyzed using applied thematic analysis. RESULTS: Related to program initiation, participants across all groups (including adolescents and caregivers) noted that they did not have a full understanding of the scope or goals of the WM program following initial referral. In addition, many participants identified misperceptions of the program (e.g., perceptions of a screening visit as compared to an intensive program). Both caregivers and adolescents identified caregivers as drivers of engagement, with adolescents often hesitant about participation in the program. However, engaged adolescents found the program valuable and sought ongoing participation following caregiver initiation. CONCLUSIONS: When considering initiation and engagement in WM services for adolescents at highest risk, healthcare providers should provide more detailed information concerning WM referrals. Future research is needed to improve adolescent perception of WM, especially for adolescents from low-income backgrounds, which could increase initiation and engagement for this population.

The association between negative body talk and body shame on disordered eating symptoms among college students.

Negative body talk (NBT), defined as negative communication about one's body, is associated with disordered eating, yet factors that may enhance these effects are understudied. Using objectification theory as a framework, NBT may reflect a vocal manifestation of self-objectification and endorsement of body shame may enhance the association between NBT and disordered eating. Given relatively consistent NBT and objectification theory-based conclusions across male and female college samples, the current study hypothesized that for college students high in body shame, NBT would be more strongly associated with disordered eating than for those low in body shame. A total of 849 college students (77.4 % female) completed measures of NBT (sex-specific), body shame, and eating disorder symptoms. Negative binomial regressions tested hypotheses separately by sex. Moderation results identified that the association between NBT and eating disorder symptoms was stronger for females reporting lower body shame compared to higher body shame. Among males, only significant main effects of NBT and body shame were observed. Body image and disordered eating preventive interventions may benefit from targeting NBT and/or body shame in males and females, and college females reporting lower body shame may be at greatest risk for the negative impact of NBT.

Impact of mothers' distress and emotional eating on calories served to themselves and their young children: An experimental study.

BACKGROUND: Parents play a significant role in children's eating behaviours and food environment. Emotional eating (i.e., eating due to/to cope with emotions regardless of hunger) can contribute to excess energy consumption and subsequent weight gain. Yet, there is a paucity of research examining mothers' feeding and eating behaviours in the presence of their young children during times of acute distress. OBJECTIVE: The current study examined whether manipulated maternal mood impacted subsequent eating and parental-feeding in mothers with overweight or obesity with their preschool aged children in a laboratory-based experiment. METHODS: Mothers (n = 47) with overweight or obesity and their preschool aged children were randomized to either an acute distress or control group. After completing a task which manipulated mothers' moods, respectively, dyads were offered a buffet of snack foods. Measures of mothers' reported emotional eating and distress were collected, and calories served and consumed were objectively measured. RESULTS: There were no between-group differences regarding calories served or consumed. Mothers across both groups who reported higher emotional eating served themselves (p = 0.014) and their children (p = 0.007) less food, and mothers consumed less food (p = 0.045). Mothers who reported higher emotional eating and increased acute distress fed their children less food (p = 0.02) and both children and mothers ate less food (p < 0.05). CONCLUSIONS: Results suggest that mothers who report emotional eating tendencies may feed their children less food during periods of acute distress.

Weight Stigma and Mental Health in Youth: A Systematic Review and Meta-Analysis.

OBJECTIVE: Over the past two decades, there has been a steady increase in research focused on the association between weight-based stigma and mental health outcomes in children and adolescents. The present study is a systematic review and meta-analysis of the associations between weight stigma and mental health in youth. METHODS: A systematic search of PubMed, PsychInfo, and Embase databases was conducted in January 2020. Inclusion criteria included the following: (a) examined an association between weight stigma and a mental health outcome, (b) mean sample age <18 (+1 standard deviation) years, (c) written in English, and (d) peer reviewed. Forty eligible articles were identified. The moderating effects of age, sex (percent female), weight status (percent with overweight/obesity), and study quality were examined. RESULTS: Overall, meta-analytic findings using a random-effects model indicated a statistically significant moderate association between weight stigma and poorer mental health outcomes (r = .32, 95% confidence interval [0.292, 0.347], p < .001). Age and study quality each moderated the association between weight stigma and mental health. Generally, the study quality was fair to poor, with many studies lacking validated measurement of weight stigma. CONCLUSIONS: Although there was a significant association between weight stigma and mental health in youth, study quality hinders the current body of literature. Furthermore, findings highlight the lack of consideration of internalized weight stigma in child populations, the importance of using validated measures of weight stigma, and the need for increased awareness of how these associations affect populations of diverse backgrounds.

Protocol for the Rhode Island CORD 3.0 Study: Adapting, Testing, and Packaging the JOIN for ME Family-Based Childhood Obesity Program in Low-Income Communities.

Background: Overweight and obesity in children is a public health crisis in the United States. Although evidence-based interventions have been developed, such programs are difficult to access. Dissemination of evidence-based pediatric weight management interventions (PWMIs) to families from diverse low-income communities is the primary objective of the CDC Childhood Obesity Research Demonstration (CORD) projects. Methods: The goal of the Rhode Island CORD 3.0 project is to adapt the evidence-based PWMI, JOIN for ME, for delivery among diverse families from low-income backgrounds and to test it in a hybrid effectiveness-implementation trial design in which the aims are to examine implementation and patient-centered outcomes. Children between the ages of 6 and 12 years with BMI ≥85th percentile and a caregiver will be recruited through two settings, a federally qualified health center, which serves as a patient-centered medical home, or low-income housing. Dyads will receive a remotely delivered group-based intervention that is 10 months in duration and includes 16 weekly sessions, followed by 4 biweekly and 4 monthly meetings. Assessments of child and caregiver weight status and child health-related quality of life will be conducted at baseline, and at 4 and 10 months after the start of intervention. Implementation outcomes assessing intervention acceptability, adoption, feasibility, fidelity, and penetration/reach will be collected to inform subsequent dissemination. Conclusions: If the adapted version of the JOIN for ME intervention can be successfully implemented and is shown to be effective, this project will provide a model for a scalable PWMI for families from low-income backgrounds. ClinicalTrials.gov no. NCT04647760.

Reactions to the U.S. Preventive Services Task Force guidelines for the management of adolescent obesity: A multi-informant qualitative approach.

The U.S. Preventive Services Task Force (USPSTF) has set forth recommendations for clinicians to screen youth (6-18 years) for obesity. Those identified should be referred to comprehensive weight management programs consisting of at least 26 contact hours and focus on multiple targets of behaviour (ie, diet, physical activity, behaviour change). However, these recommendations are primarily based upon outcomes from randomized controlled trials and the feasibility of meeting these guidelines for adolescents in a clinical setting is unknown. The present study employed a multi-informant qualitative approach with adolescents, parents, and physicians, to identify and understand multiple perspectives on the feasibility and acceptability of implementing the USPSTF guidelines. In-depth interviews with seven adolescents, seven parents, and four physicians were analysed. Generally, participants viewed the guidelines positively but identified changes that may be necessary to increase the feasibility of adolescents engaging in programs that meet these guidelines. Participants also noted the importance of flexibility within programs, indicating that it would be difficult for many adolescents to participate in a program that was not tailored to their needs and resources. Future research should focus on adapting clinical weight management programs to meet both USPSTF guidelines and the needs of adolescents and their families.

Use of Ecological Momentary Assessment to Measure Self-Monitoring of Blood Glucose Adherence in Youth With Type 1 Diabetes.

OBJECTIVE: Daily self-monitoring of blood glucose (SMBG) is essential for type 1 diabetes management yet is challenging during adolescence. Ecological momentary assessment (EMA) is the repeated sampling of behaviors and experiences in real time in the natural environment. The purpose of this study was to evaluate 1) the validity of self-reported SMBG values via text message-delivered EMA surveys compared with objective SMBG values via glucose meters and 2) in-the-moment motivators and barriers to performing SMBG in a pediatric type 1 diabetes population. METHODS: Youth (n = 62, aged 11-21 years) with type 1 diabetes received three text messages daily for 10 days containing surveys inquiring about SMBG engagement. Objective SMBG values were downloaded from glucose meters. RESULTS: On average, participants reported performing SMBG 4 times/day. Of the self-reported SMBG values, 39.6% were accurate. Inaccurate values included additions (i.e., self-reported value with no objective value), omissions (i.e., objective value with no self-reported value), and alterations (difference between self-report and objective SMBG values ≥10 mg/dL). Of the matched pairs of self-reported and objective SMBG values, 41.3% were altered. Bland-Altman plots determined that the mean difference between self-reported and objective glucose data were -5.43 mg/dL. Participants reported being motivated to check their blood glucose because it was important for their health, and reported barriers included wanting to ignore the task, forgetting, and not having devices. CONCLUSION: Youth's self-reported SMBG values may not align with objective readings. The results of this study can facilitate future research to determine individual factors related to SMBG and accuracy of self-reporting.

The use of internet sources for nutritional information is linked to weight perception and disordered eating in young adolescents.

The internet serves as an accessible and confidential resource for young adolescents seeking nutritional information. However, the quality of information retrieved online is mixed and could have serious implications for users. Young adolescents who perceive themselves as overweight may be disproportionately affected as they are at greater risk for disordered eating. The current study aimed to (1) assess whether the frequency of use of different internet sources to obtain nutritional information differs between healthy weight young adolescents and those with overweight/obesity based on both objective and perceived weight status and (2) evaluate the relationships between different internet sources utilized for nutritional information and disordered eating. Young adolescents (n = 167; 10-15 years) completed the Children's Eating Attitudes Test (ChEAT; total disordered eating), indicated their perceived weight status, and reported how often they obtained nutritional information from the following internet sources: professional websites, personal websites, social media, commercial weight loss websites, and forums. Objective height and weight measurements were obtained. Young adolescents that perceived themselves to be a little overweight or overweight reported greater use of personal websites (p = .012), commercial weight loss websites (p = .011), and social media (p = .019) for nutritional information than those that did not perceive themselves to be a little overweight or overweight. The frequency of use of internet sources for nutritional information did not differ based on objective weight status. Greater use of each of the internet sources for nutritional information was related to greater disordered eating (p's < 0.05). While longitudinal research is needed to further examine these relationships, healthcare providers and teachers should provide young adolescents with guidance for interpreting and using online nutritional information to encourage valid and reliable health recommendations.

Family functioning mediates the relationship between child behavior problems and parent feeding practices in youth with overweight or obesity.

Parental feeding practices play a significant role in children's health behaviors. Given the high prevalence of childhood obesity, it is important to examine factors that may influence parental feeding practices. This study examined the role of family functioning on the relationship between child behavior problems and parent feeding practices. We hypothesized that higher problematic child behavior would correlate with lower parental engagement in healthy parent feeding practices, with greater family dysfunction mediating that relationship. Participants (n = 220) were rural-dwelling parents of school-aged children with overweight or obesity. Participants completed the McMaster Family Assessment Device, Child Behavior Checklist (CBCL), and Child Feeding Questionnaire at baseline. Mediation models were used with youth behavioral problems (CBCL) as the independent variable, parental feeding practices as the dependent variable, and family functioning as the mediator. Two significant mediation models revealed (a) family functioning mediated the relationship between child behavior problems and parental perception of responsibility taking for child eating, and (b) family functioning mediated the relationship between child behavior problems and parental monitoring of their child's eating. More child behavior problems were associated with unhealthier family functioning, which was associated with less parental monitoring of children's unhealthy food intake and reduced responsibility taking for feeding and meal planning of their children. These findings suggest the synergistic effect of child behavior problems with poorer family functioning may be a risk factor for unhealthy parent feeding practices in children with overweight or obesity. If these relationships are supported by longitudinal research, behavior interventions for children with obesity should consider poor family functioning and child behavior as potential barriers to parental monitoring and responsibility of children's feeding practices.

Perceptions of Health Behaviors and Mobile Health Applications in an Academically Elite College Population to Inform a Targeted Health Promotion Program.

BACKGROUND: College is a critical developmental time when many emerging adults engage in unhealthy behaviors (i.e., lack of exercise, poor diet, smoking) and consequently experience an increased risk for a decline in cardiovascular health. Understanding the beliefs and opinions of the target population is important to develop effective health promotion interventions. The goal of this study was to understand opinions regarding health and health-related mobile technology of college students at an academically elite Midwestern university in order to inform a mobile health promotion intervention following the integrated behavioral model framework. METHOD: Eighteen college students between the ages of 18 and 22 participated in one of four focus groups, where they discussed perceptions of health behaviors, technology use, and their college environment. Data were analyzed using inductive thematic analysis as well as consensus and conformity analysis. RESULTS: Students reported prioritizing academic success over health and believed in a cultural norm within the university that unhealthy behavioral practices lead to increased academic success. Other identified barriers to achieving good health were (a) low self-efficacy for engaging in healthy behaviors when presented with conflicting academic opportunities and (b) low estimation of the importance of engaging in health behaviors. Regarding mobile health applications (apps), students reported preferring apps that were visually attractive, personalized to each user, and that did not involve competing against other users. CONCLUSION: These results have implications for the development of mobile health promotion interventions for college students, as they highlight facilitators and barriers to health behavior change in an academically elite student body.

Objectively Measured Adherence in Adolescents With Type 1 Diabetes on Multiple Daily Injections and Insulin Pump Therapy.

Objectives: Type 1 diabetes (T1D) poses unique challenges to adherence-related behavior because of complex treatment regimens that vary by use of specific technologies. This study used objective data to determine (1) prevalence rates of adherence behaviors in adolescents with T1D, and (2) relationships between adherence and glycemic control. Methods: Data were downloaded for the past 30 consecutive days from glucose meters and multiple insulin pump models for 80 youth (11-17 years old; n = 40 on multiple daily injections (MDIs) and n = 40 on continuous subcutaneous insulin infusion [CSII]). Frequency of self-monitoring of blood glucose (SMBG; MDI and CSII users); carbohydrate entry (CSII users); daily insulin bolus delivery (CSII users); episodes of high, very high, and dangerously high hyperglycemia; and correction bolusing for hyperglycemia (CSII users) were calculated. Results: Participants completed SMBG ≥4 times/day on 46.13% of days (MDI users), 48.74% of days (CSII users nonmanual entries only), and 59.07% of days (CSII users; manual plus nonmanual entries). CSII users entered carbohydrates ≥3 times/day on 61.47% of days and bloused insulin ≥3 times/ day on 87.34% of days. Hyperglycemic readings were followed by a correction bolus in <70% of cases. Greater SMBG, carbohydrate entry, bolus insulin delivery, and correction bolusing for high and very high hyperglycemia predicted lower glycated hemoglobin (sample M = 8.74%, SD = 1.75%). Conclusions: Objective data from diabetes technology are helpful to differentiate adherence to specific domains of treatment but are complex in nature. Findings support a need for further research to elucidate predictive factors of suboptimal adherence in adolescents with T1D.

New-Onset Diabetes Educator to Educate Children and Their Caregivers About Diabetes at the Time of Diagnosis: Usability Study.

BACKGROUND: Diabetes self-management education is essential at the time of diagnosis. We developed the New-Onset Diabetes Educator (NODE), an animation-based educational web application for type 1 diabetes mellitus patients. OBJECTIVE: Our hypothesis is that NODE is a feasible, effective and user-friendly intervention in improving diabetes self-management education delivery to child/caregiver-dyads at the time of diagnosis. METHODS: We used a pragmatic parallel randomized trial design. Dyads were recruited within 48 hours of diagnosis and randomized into a NODE-enhanced diabetes self-management education or a standard diabetes self-management education group. Dyads randomized in the NODE group received the intervention on an iPad before receiving the standard diabetes self-management education with a nurse educator. The Diabetes Knowledge Test 2 assessed disease-specific knowledge pre- and postintervention in both groups, and was compared using t tests. Usability of the NODE mobile health intervention was assessed in the NODE group. RESULTS: We recruited 16 dyads (mean child age 10.75, SD 3.44). Mean Diabetes Knowledge Test 2 scores were 14.25 (SD 4.17) and 18.13 (SD 2.17) pre- and postintervention in the NODE group, and 15.50 (SD 2.67) and 17.38 (SD 2.26) in the standard diabetes self-management education group. The effect size was medium (Δ=0.56). Usability ratings of NODE were excellent. CONCLUSIONS: NODE is a feasible mobile health strategy for type 1 diabetes education. It has the potential to be an effective and scalable tool to enhance diabetes self-management education at time of diagnosis, and consequently, could lead to improved long-term clinical outcomes for patients living with the disease.

Physical activity: a synopsis and comment on "community-wide interventions for increasing physical activity".

In this synopsis, we summarize and comment on Baker and colleagues' Cochrane review of studies on the population-level impact of community-wide physical activity (PA) interventions. Insufficient PA remains a major public health problem. Community-wide interventions offer an opportunity to extend reach by increasing the proportion of the population experiencing the intervention. A previous Cochrane review of community-wide PA interventions concluded that evidence for effectiveness was mixed. Hence, Baker and colleagues incorporated new data about community-based PA interventions. This Cochrane review concluded there is an overall lack of evidence that community-wide interventions improve PA outcomes at the population level. Recommendations are that future research should use high quality research design, more explicitly test ways to increase reach, and utilize objective measurements of PA to increase validity. We suggest that future research should first optimize the intervention by systematically evaluating treatment components and selecting a maximally efficient and effective treatment package.