Racial/ethnic and weight status disparities in dieting and disordered weight control behaviors among early adolescents.

BACKGROUND: This study examined whether racial/ethnic minority early adolescents with overweight/obesity are at increased risk of disordered weight control behaviors, defined as unhealthy behaviors aiming to control or modify shape and weight, ranging from self-induced vomiting to the use of dietary supplements. METHODS: U.S. Middle school children (n=12.511) provided self-report of gender, race/ethnicity, height, and weight as well as dieting and disordered weight control behaviors. RESULTS: In the entire sample, 25.6% (n=1514) of girls and 16.6% (n=1098) of boys reported dieting within the last month, while 3.5% (n=200) of girls and 2.7% (n=176) of boys reported DWCB. Within all racial/ethnic groups, participants classified as being overweight/obese (34% to 50%) were more likely to report dieting compared to their counterparts without overweight/obesity (9.6% to 29.6%). Racial/ethnic minority children with overweight/obesity had an increased risk of dieting and disordered weight control behaviors compared to their counterparts without overweight/obesity, and, for some outcomes, compared to their White peers with overweight/obesity. CONCLUSIONS: Racial/ethnic minority early adolescents with overweight/obesity are a particularly vulnerable group for disordered eating.

Three-Year Improvements in Weight Status and Weight-Related Behaviors in Middle School Students: The Healthy Choices Study.

INTRODUCTION: Few dissemination evaluations exist to document the effectiveness of evidence-based childhood obesity interventions outside the research setting. OBJECTIVE: Evaluate Healthy Choices (HC), a multi-component obesity prevention program, by examining school-level changes in weight-related behaviors and weight status and the association of implementation components with odds of overweight/obesity. METHODS: We compared baseline and Year 3 school-level behavioral and weight status outcomes with paired t-tests adjusted for schools' socio-demographic characteristics. We used generalized estimating equations to examine the odds of overweight/obesity associated with program components. SETTING/PARTICIPANTS: Consecutive sample of 45 of 51 middle schools participating in the HC program with complete baseline and follow-up survey data including a subsample of 35 schools with measured anthropomentry for 5,665 7th grade students. INTERVENTION: Schools developed a multi-disciplinary team and implemented an obesity prevention curriculum, before and after school activities, environmental and policy changes and health promotions targeting a 5-2-1 theme: eat ≥ 5 servings/day of fruits and vegetables (FV), watch ≤ 2 hours of television (TV) and participate in ≥ 1 hours/day of physical activity (PA) on most days. MAIN OUTCOME MEASURES: 1) School-level percent of students achieving targeted behaviors and percent overweight/obese; and 2) individual odds of overweight/obesity. RESULTS: The percent achieving behavioral goals over three years increased significantly for FV: 16.4 to 19.4 (p = 0.001), TV: 53.4 to 58.2 (p = 0.003) and PA: 37.1 to 39.9 (p = 0.02), adjusting for school size, baseline mean age and percent female, non-Hispanic White, and eligible for free and reduced price lunch. In 35 schools with anthropometry, the percent of overweight/obese 7th grade students decreased from 42.1 to 38.4 (p = 0.016). Having a team that met the HC definition was associated with lower odds of overweight/obesity (OR = 0.83, CI: 0.71-0.98). CONCLUSIONS AND RELEVANCE: The HC multi-component intervention demonstrated three-year improvements in weight-related behaviors and weight status across diverse middle schools. Team building appears important to the program's effectiveness.

Implementing a multicomponent school-based obesity prevention intervention: a qualitative study.

OBJECTIVE: To explore barriers and facilitators to implementing and sustaining Healthy Choices, a 3-year multicomponent obesity prevention intervention implemented in middle schools in Massachusetts. METHODS: Using purposive sampling, 56 in-depth interviews were conducted with middle school employees representing different positions (administrators, teachers, food service personnel, and employees serving as intervention coordinators). Interviews were recorded and transcribed. Emergent themes were identified using thematic analyses. RESULTS: State-mandated testing, budget limitations, and time constraints were viewed as implementation barriers, whereas staff buy-in, external support, and technical assistance were seen as facilitating implementation. Respondents thought that intervention sustainability depended on external funding and expert assistance. CONCLUSIONS AND IMPLICATIONS: Results confirm the importance of gaining faculty and staff support. Schools implementing large-scale interventions should consider developing sustainable partnerships with organizations that can provide resources and ongoing training. Sustainability of complex interventions may depend on state-level strategies that provide resources for implementation and technical assistance.

Middle school food environments and racial/ethnic differences in sugar-sweetened beverage consumption: findings from the Healthy Choices study.

BACKGROUND: Prior studies have demonstrated disproportionate clustering of fast food outlets around schools. PURPOSE: The purpose of this study is to determine if racial/ethnic differences in middle school student self-reported sugar-sweetened beverage (SSB) consumption is explained by differential distributions of food outlets surrounding their schools. METHODS: Baseline (2005) data were analyzed from 18,281 middle school students in 47 Massachusetts schools participating in Healthy Choices, an obesity prevention program. Linear mixed effects models were used to examine the association of individual race/ethnicity and daily SSB consumption and the potential mediating effect of the density of food outlets (the number of fast food outlets and convenience stores in a 1500 m buffer area surrounding the school) on this association adjusting for individual and school demographics. RESULTS: More SSB consumption was reported by students of all racial/ethnic minority groups compared to their White peers except Asians. The density of fast food restaurants and convenience stores was not associated with individual SSB consumption (ß=0.001, p=0.875) nor did it mediate the association of race/ethnicity and SSB consumption. CONCLUSIONS: Racial and ethnic differences in SSB consumption among MA middle school students cannot be fully explained by the location of fast food restaurants and convenience stores.

Effect of the planet health intervention on eating disorder symptoms in Massachusetts middle schools, 2005-2008.

INTRODUCTION: The Planet Health obesity prevention curriculum has prevented purging and abuse of diet pills (disordered weight control behavior [DWCB]) in middle-school girls in randomized trials, but the effects of Planet Health on DWCB when implemented by schools under dissemination conditions are not known. METHODS: Massachusetts Department of Public Health and Blue Cross Blue Shield of Massachusetts disseminated Planet Health as part of the 3-year, Healthy Choices obesity prevention program in middle schools. We conducted an evaluation in 45 schools from fall 2005 to spring 2008. We gathered data from school staff to quantify intervention activities, and we gathered anonymous cross-sectional survey data from students on DWCB at baseline and Year 3 follow-up (n = 16,369). Multivariate logistic analyses with generalized estimating equations examined the effect of intervention activities on odds of students reporting DWCB at follow-up. RESULTS: Students in schools reaching a high number of youth with Planet Health lessons on reducing television viewing had lower odds of DWCB at follow-up (odds ratio [OR], 0.80 per 100 lesson-exposures; 95% confidence interval [CI], 0.74-0.85). In addition, reduced odds of DWCB at follow-up were found in schools with active staff teamwork (OR, 0.76; 95% CI, 0.66-0.86) and the presence of programs addressing television viewing goals with staff (OR, 0.38; 95% CI, 0.28-0.53). CONCLUSION: Combined evidence from efficacy and effectiveness trials and now from dissemination research indicates that appropriately designed obesity prevention programs can achieve DWCB prevention on a large scale.