Racial/Ethnic Differences in the Effectiveness of a Multisector Childhood Obesity Prevention Intervention.

OBJECTIVES: To investigate racial/ethnic and language differences in the effectiveness of the Massachusetts Childhood Obesity Research Demonstration (MA-CORD) study among children aged 2 to 4 years enrolled in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC). METHODS: We performed a multisector quasiexperimental study in 2 MA-CORD intervention communities and 1 comparison community. Using WIC data from 2010 to 2015, we examined intervention effect on child weight and behavior outcomes by child race/ethnicity and parental primary language using multilevel linear regression models with an interaction term. RESULTS: Non-Hispanic Black children exposed to the intervention demonstrated a greater decrease in body mass index (BMI) than did other children (P < .05). Racial/ethnic minority children in the comparison site had greater increases in BMI than did their White counterparts (P < .05). There were no differences in intervention effectiveness by race/ethnicity or language for health behaviors. CONCLUSIONS: White children demonstrated decreased BMI in both the intervention and control groups. However, intervention minority children demonstrated greater improvements in BMI than did control minority children. Public Health Implications. To reduce racial/ethnic disparities, we need to disseminate effective obesity prevention interventions during early childhood in low-income settings.

Nutrition provider confidence in the Massachusetts Childhood Obesity Research Demonstration (MA-CORD) study.

OBJECTIVE: The multi-sector, multi-level Massachusetts Childhood Obesity Research Demonstration (MA-CORD) study resulted in improvements in obesity risk factors among children age 2-4 years enrolled in the Special Supplemental Nutrition program for Women, Infants, and Children (WIC). The goal of this study was to examine whether the MA-CORD intervention increased WIC provider confidence in their ability to identify childhood obesity and obesity-related behaviors. METHODS: As part of the MA-CORD intervention conducted from 2012 to 2015, we implemented WIC practice changes focused on childhood obesity prevention within two Massachusetts communities. We examined changes in provider confidence to assess childhood obesity risk factors and practice frequency among WIC practices located in MA-CORD intervention communities over a 3-year period, compared to non-intervention sites. We measured provider confidence on a continuous scale using questions previously developed to assess provider and parent confidence to make weight-related behavior change (range 0 to 24). RESULTS: There were 205 providers at baseline and 165 at follow-up. WIC providers at intervention sites reported greater confidence in their ability to identify childhood obesity and obesity-related behaviors compared to the usual care sites (ß = 1.01, standard error = 0.13). These findings persisted after adjusting for provider gender, years in practice, highest education level, and WIC position. CONCLUSIONS: The MA-CORD intervention was associated with increased WIC provider confidence to assess children's obesity risk. Interventions that increase confidence in assessing obesity-related behaviors may have salutary effects within WIC programs that serve low-income families.

Childhood obesity prevention in the women, infants, and children program: Outcomes of the MA-CORD study.

OBJECTIVE: To examine the extent to which a Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) intervention improved BMI z scores and obesity-related behaviors among children age 2 to 4 years. METHODS: In two Massachusetts communities, practice changes in WIC were implemented as part of the Massachusetts Childhood Obesity Research Demonstration (MA-CORD) initiative to prevent obesity among low-income children. One WIC program was the comparison. Changes in BMI z scores pre and post intervention and prevalence of obesity-related behaviors of WIC participants were assessed. Linear mixed models were used to examine BMI z score change, and logistic regression models were used to examine changes in obesity-related behaviors in each intervention site versus comparison over 2 years. RESULTS: WIC-enrolled children in both intervention sites (vs. comparison) had improved sugar-sweetened beverage consumption and sleep duration. Compared to the comparison WIC program (n = 626), no differences were observed in BMI z score among children in Intervention Site #1 (n = 198) or #2 (n = 637). In sensitivity analyses excluding Asian children, a small decline was observed in BMI z score (-0.08 units/y [95% confidence interval: -0.14 to -0.02], P = 0.01) in Intervention Site #2 versus comparison. CONCLUSIONS: Among children enrolled in WIC, the MA-CORD intervention was associated with reduced prevalence of obesity risk factors in both intervention communities and a small improvement in BMI z scores in one of two intervention communities in non-Asian children.