• Stephenie C Lemon, Monica L Wang, Nicole M Wedick, Barbara Estabrook, Susan Druker, Kristin L Schneider, Wenjun Li, and Lori Pbert.
• University of Massachusetts Medical School, Division of Preventive and Behavioral Medicine, Department of Medicine, 55 Lake Avenue North, Worcester, MA 01655, USA. Electronic address: Stephenie.Lemon@umassmed.edu.
• Prev Med. 2014 Mar 1; 60: 414741-7.

ObjectiveTo describe the effectiveness, reach and implementation of a weight gain prevention intervention among public school employees.MethodA multi-level intervention was tested in a cluster randomized trial among 782 employees in 12 central Massachusetts public high schools from 2009 to 2012. The intervention targeted the nutrition and physical activity environment and policies, the social environment and individual knowledge, attitudes and skills. The intervention was compared to a materials only condition. The primary outcome measures were change in weight and body mass index (BMI) at 24-month follow-up. Implementation of physical environment, policy and social environment strategies at the school and interpersonal levels, and intervention participation at the individual level were assessed.ResultsAt 24-month follow-up, there was a net change (difference of the difference) of -3.03 pounds (p=.04) and of -.48 BMI units (p=.05) between intervention and comparison conditions. The majority of intervention strategies were successfully implemented by all intervention schools, although establishing formal policies was challenging. Employee participation in programs targeting the physical and social environment was maintained over time.ConclusionThis study supports that a multi-level intervention integrated within the organizational culture can be successfully implemented and prevent weight gain in public high school employees.Copyright © 2013. Published by Elsevier Inc.

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