title: Impact of a school-based intervention program on obesity risk factors in Mexican children.
abstract: OBJECTIVE
  To evaluate the impact of an 18-month school obesity prevention intervention on the health behaviors of 4th and 5th grade students based on ecological principles and formative research conducted in Mexico.
  
  
  METHODS
  A Randomized Control Trial (RCT), design was used to assign 27 schools to one of three conditions: basic or plus interventions and control. School environment measures, children's eating and physical activity behaviors, and body mass index were assessed four times over a 2-year period in a sample of 830 students.
  
  
  RESULTS
  In the intervention schools, the availability of healthy foods increased with a concomitant decrease in unhealthy food availability. Food intake showed the same trend. In the intervention schools, children did not engage in more moderate to vigorous physical activity (MVPA) in physical education (PE) class or recess but increased steps taken. Obesity prevalence did not change.
  
  
  CONCLUSIONS
  The intervention improved the school food environment and child healthy behaviors.
authors.affiliation: Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Margarita
authors.initials: M
authors.lastname: Safdie
authors.affiliation: Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Nancy
authors.initials: N
authors.lastname: Jennings-Aburto
authors.affiliation: School of Kinesiology and Health Studies, Queen's University, Ontario, Canada.
authors.forename: Lucie
authors.initials: L
authors.lastname: Lévesque
authors.affiliation: School of Kinesiology and Health Studies, Queen's University, Ontario, Canada.
authors.forename: Ian
authors.initials: I
authors.lastname: Janssen
authors.affiliation: Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Fabricio
authors.initials: F
authors.lastname: Campirano-Núñez
authors.affiliation: Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Nancy
authors.initials: N
authors.lastname: López-Olmedo
authors.affiliation: Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Tania
authors.initials: T
authors.lastname: Aburto
authors.affiliation: Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México.
authors.forename: Juan A
authors.initials: JA
authors.lastname: Rivera
mesh_terms: D001294:Attitude to Health; D001823:Body Composition; D002648:Child; D004032:Diet; D060766:Drinking Water; D005247:Feeding Behavior; D005260:Female; D005518:Food Preferences; D005523:Food Supply; D006293:Health Promotion / Q000458:organization & administration*; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D009043:Motor Activity; D063766:Pediatric Obesity / Q000453:epidemiology / Q000517:prevention & control*; D010809:Physical Fitness; D015397:Program Evaluation; D012572:School Health Services / Q000458:organization & administration*; D012574:Schools
chemical_list: D060766:Drinking Water