title: Methods of the National Nutrition Survey 1999.
abstract: OBJECTIVE
  To describe the methods and analyses of the 1999 National Nutrition Survey (NNS-99).
  
  
  METHODS
  The 1999 National Nutrition Survey (NNS-99) is a probabilistic survey with nationwide representativity. The NNS-99 included four regions and urban and rural areas of Mexico. The last sampling units were households, selected through stratified cluster sampling. The study population consisted of children under five years of age, school-age children (6-11 years), and women of childbearing age (12-49 years). Data were collected on anthropometric measurements, hemoglobin levels, morbidity and its determinants, and socioeconomic and demographic characteristics. In addition, data on diet and micronutrients intakes (iron, zinc, vitamin A, folic acid, vitamin C, and iodine) were obtained in a sub-sample of subjects.
  
  
  RESULTS
  The response rate for the NNS-99 was 82.3%; the non-response rate was 5.9% and the remaining did not participate due to uninhabited houses.
  
  
  CONCLUSIONS
  This survey updates the information on nutritional status in Mexico and should serve as the basis for food and nutrition policy-making and priority program design. The English version of this paper is available too at: http://www.insp.mx/salud/index.html.
authors.affiliation: Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México. eresano@correo.insp.mx
authors.forename: Elsa
authors.initials: E
authors.lastname: Resano-Pérez
authors.forename: Ignacio
authors.initials: I
authors.lastname: Méndez-Ramírez
authors.forename: Teresa
authors.initials: T
authors.lastname: Shamah-Levy
authors.forename: Juan A
authors.initials: JA
authors.lastname: Rivera
authors.forename: Jaime
authors.initials: J
authors.lastname: Sepúlveda-Amor
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003625:Data Collection / Q000379:methods; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008800:Mexico; D008875:Middle Aged; D009749:Nutrition Surveys