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ABSTRACT | 163 Consortium for School Health was adopted to consider the following domains for HPS activities: social and physical environment, teaching and learning, healthy school policy, and partnerships and services. The rubric, a familiar assessment tool in educational settings, defines HPS best practices at different levels of implementation, and was developed in consultation with local stakeholders. The tool will be administered to all schools in Nova Scotia with Grade 5 students as part of a larger CIHR-funded research project (The Children’s Lifestyle and School Performance Study, CLASS II). A quantitative system will be developed to score schools according to their level of implementation. The findings will highlight the need to consider local policy contexts in the development and administration of tools, to accurately measure implementation of health promotion activities. Results will help advance future tool development and provide insight into what schools need to create a healthy school environment, thereby contributing to childhood obesity prevention. 83 Influencing physical activity and nutrition knowledge, attitudes, and behaviours of Métis children through a Health Promoting School Intervention S.N. Oosman 1 , K.E. Chad 1 , and J. Smylie 2 1 University of Saskatchewan, Saskatoon, Saskatchewan, Canada; 2 University of Toronto, Toronto, Ontario, Canada Introduction: Obesity rates are increasing among children living in Canada and disproportionately affecting Métis children. Lifestyle choices related to physical activity (PA) and nutrition are linked to the development of childhood obesity and are influenced by the social determinants of health. The Métis lifestyle historically involved activities like hunting, fishing, berry-gathering and gardening, all of which provided a nutritious and local diet. Implementing PA and nutrition interventions that integrate Métis culture, traditions and values may encourage healthy lifestyle choices in Métis children and further prevent the development of obesity. The goal of this project is to examine the effectiveness of a health-promoting school (HPS) program on PA and nutrition knowledge, attitudes, beliefs, and behaviours (KABB) of rural Métis children. Methods: A Participatory Action Research (PAR) framework is applied to ensure the emergence of Métis knowledge. Focus group discussions, key informant interviews, photovoice, accelerometry, and questionnaires provide information on PA and nutrition KABB of Métis children. Results: The impact of the HPS intervention on PA and nutrition knowledge, attitudes, and beliefs is identified. Moderate and vigorous physical activity is compared before and after the HPS intervention to determine the influence of HPS programming on PA behaviours. Photographs and quotes from the participants highlight enablers and barriers to children participating in healthy PA and nutrition practices Conclusions: This project clarifies the role a HPS may have on influencing PA and nutrition KABB among Métis children, and may further provide community-specific solutions to the challenges Métis children face in making healthy choices. 84 Effectiveness of three overweight and obesity prevention strategies in high school adolescents: The PRALIMAP trial E. Bonsergent 1,2 , S. Briançon 1,2,3 , N. Agrinier 1,2,3 , S. Tessier 3,4 , K. Legrand 2,3 , E. Lecomte 5 , E. Aptel 6 , S. Hercberg 4 , J-F. Collin 2,3 , and PRALIMAP Trial Group 2,5,6,7 1 Nancy-University, Paul Verlaine Metz University, Paris Descartes University, Nancy, France; 2 Nancy-University, Faculty of medicine, School of Public Health, Nancy, France; 3 Nancy University Hospital, Epidemiology and clinical evaluation department, Nancy, France; 4 UMR U557 INSERM/ U1125 Inra/CNAM/Paris 13, SBMH-Paris Bobigny, France; 5 National conservatory of arts and crafts (CNAM), Nancy, France; 6 Local school office of the Nancy-Metz academy, Nancy, France; 7 Regional institute for health education (IREPS), Nancy, France Introduction: Regarding the improvement of nutritional behaviours and knowledge in the PRALIMAP trial, we assessed the effectiveness of three health promotion strategies to reduce overweight and obesity prevalence. Methods: PRALIMAP was a stratified 2x2x2 factorial cluster randomized trial including 24 high schools in France. The follow- up consisted of three visits over a two-year-period at grade 10(T0), grade 11(T1), and grade 12(T2) entries. Body size indicators were derived from weight and height measured by trained nurses. The three interventional strategies were implemented over two academic years: “educational” included nutritional lessons, working groups, and a final party; “screening” included overweight/obesity detection, followed by an adapted education and care program; “environmental” included high school nutritional offerings improvement. An intention-to-treat analysis was conducted on completers T0 and T2 data using a three- level mixed model. Results: 3,790 adolescents completed the trial. At baseline, 57.6% were girls, their mean age was 15.7±0.7yo, their mean body mass index (BMI) was 21.5±3.5kg/m², and 18.6% were overweight or obese. The proportion of overweight and obese adolescents more significantly decreased over the two-year-period in screening strategy alone high schools, as compared to control high schools (OR=0.59,p=0.0094), whereas educational strategy had a negative impact (OR=1.97,p=0.0003). The mean waist circumference decreased with a combined educational and environmental strategy (=-1.46,p=0.0001). Conclusions: A screening strategy performed alone reduces overweight and obesity prevalence in adolescence. Agreement and discrepancies between behaviours and knowledge evolution and overweight and obesity prevalence evolution will be discussed. They allow for public health recommendations. 85 Physical activity & obesity among preschool- aged children: A meta-analytic review of the effectiveness of health promotion interventions E.S. Gordon 1 , P.A. Tucker 2 , S.M. Burke 3 , and A.V. Carron 4 1 The University of Western Ontario-Child Health and Physical Activity Lab, London, Ontario, Canada; 2 The University of Western Ontario-Elborn College, University of Western Ontario, London, Ontario, Canada; 3 The University of Western Ontario-Arthur and Sonia Labatt Health Sciences, London, Ontario, Canada; 4 The University of Western Ontario-Thames Hall London, Ontario, Canada The World Health Organization (2010) has estimated that globally, there are more than 42 million overweight children under the age of five. Many adult health behaviours, such as physical activity participation, develop during the preschool years. Thus, it is worthwhile to investigate the efficacy of health promotion interventions directed at this cohort. The main purpose of the study was to examine the effectiveness of health promotion interventions aimed at increasing physical activity levels and/or decreasing obesity among preschool- aged children (aged two to five years). A secondary purpose was to investigate the influence of a number of moderator variables (e.g., gender, location of intervention, follow-up period, etc.) on the physical activity behaviours and obesity rates of preschoolers. Nine databases were systematically searched using several combinations of keywords. A total of 20 studies met the inclusion criteria (i.e., were available in English; contained a health promotion intervention; and presented data pertaining to physical activity levels and/or obesity-related outcomes in preschool-aged children), and were included in the analyses. Effect sizes (i.e., Hedges g values) were calculated using Comprehensive Meta-Analysis (CMA) software, and a random effects model was used to reduce Type 1 error and generalize the results beyond the sample of observed studies. Results pertaining to the overall effectiveness of
