title: [Estimation of overweight and obesity in preschoolers according to national and international normativity].
abstract: BACKGROUND
  Prevalence of overweight and obesity in children under 5 years can be affected by type of anthropometric indicator and selected threshold values. We assessed variation on estimates according to national and international regulations (NOM-031-SSA2-1999, NOM-008-SSA3-2010, GPC-SSA-025-08 and GPC-IMSS-029-08; WHO-2006, CDC-2000 and IOTF, respectively).
  
  
  METHODS
  Cross-sectional study in all the daycare centers (100 %) affiliated to Instituto Mexicano del Seguro Social-Nuevo León during June-December, 2010 (n = 11 141 children). Overweight and obesity were defined on the basis of each regulation, and total and stratified prevalences by age and sex were estimated.
  
  
  RESULTS
  According to national regulation, overweight/obesity estimates varied from 12 to 22 %, and to international normativity, from 3 to 14 %. The highest prevalence was given by NOM-008-SSA3-2010 and GPC-SSA-025-08; and the lowest by WHO-2006. There were no differences by sex, but they existed by age; the highest discrepancy occurred in the 3.0-3.9 age group with 28 %.
  
  
  CONCLUSIONS
  Health personnel and health policy makers should be aware of variation on estimates according to the definition employed. We recommend to standardize national regulation for pointing out overweight/obesity in preschoolers.
authors.affiliation: Unidad de Investigación Epidemiológica y en Servicios de Salud, Delegación Regional Nuevo Lerón, Instituto Mexicano del Seguro Social, Monterrey, Nuevo León, México. ana.salinasm@imss.gob.mx.
authors.forename: Ana María
authors.initials: AM
authors.lastname: Salinas-Martínez
authors.forename: Álvaro
authors.initials: Á
authors.lastname: Mathiew-Quirós
authors.forename: Ricardo Jorge
authors.initials: RJ
authors.lastname: Hernández-Herrera
authors.forename: Eduardo José
authors.initials: EJ
authors.lastname: González-Guajardo
authors.forename: María Guadalupe
authors.initials: MG
authors.lastname: Garza-Sagástegui
mesh_terms: D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D038622:Internationality; D008297:Male; D008800:Mexico; D050177:Overweight / Q000175:diagnosis*; D063766:Pediatric Obesity / Q000175:diagnosis*; D012016:Reference Values
keywords: Body weight; Child preschool; Pediatric obesity