Small-area estimation and prioritizing communities for obesity control in Massachusetts

Objectives. We developed a method to evaluate geographic and temporal variations in community-level obesity prevalence and used that method to identify communities in Massachusetts that should be considered high priority communities for obesity control. Methods. We developed small-area estimation models to estimate community-level obesity prevalence among community-living adults 18 years or older. Individual-level data from the Behavioral Risk Factors Surveillance System from 1999 to 2005 were integrated with community-level data fromthe 2000 USCensus. Small-area estimation models assessed the associations of obesity (body mass index≥30 kg/m2) with individual- and community-level characteristics. A classi-fication system based on level and precision of obesity prevalence estimates was then used to identify high-priority communities. Results. Estimates of the prevalence of community-level obesity ranged from 9% to 38% in 2005 and increased in all communities from 1999 to 2005. Fewer than 7% of communities met the Healthy People 2010 objective of prevalence rates below 15%. The highest prevalence rates occurred in communities characterized by lower income, less education, and more blue-collar workers. Conclusions. Similar to the rest of the nation, Massachusetts faces a great challenge in reaching the national obesity control objective. Targeting highpriority communities identified by small-area estimation may maximize use of limited resources.