title: [A decade of lead monitoring in schoolchildren in the metropolitan area of Monterrey NL, Mexico].
abstract: OBJECTIVE
  To establish the blood lead concentration and associated risk factors in schoolchildren during 1998 and 2008.
  
  
  METHODS
  A blood lead screening was conducted in schoolchildren of 6-12 years of age, enrolled in 17 elementary schools of the metropolitan area of Monterrey, México, during 1998 and 2008.
  
  
  RESULTS
  The mean blood lead level were 9.6 ± 3.0 (µg/dL range of 3.18 to 20.88) in 1998 and 4.5±4.8 µg/dL (range of 3.3 to 53.7) showing a 2.1-times reduction in blood lead levels (p<0.01).
  
  
  CONCLUSIONS
  This reduction in blood lead levels demonstrate environmental and industrial control improvements and the benefits of fading out the leaded gasoline during the 1990's.
authors.affiliation: Escuela de Medicina del Tecnológico de Monterrey, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: Jesús
authors.initials: J
authors.lastname: Santos-Guzmán
authors.affiliation: Escuela de Medicina del Tecnológico de Monterrey, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: Claudia
authors.initials: C
authors.lastname: Madrigal-Ávila
authors.affiliation: Escuela de Medicina del Tecnológico de Monterrey, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: José Ascención
authors.initials: JA
authors.lastname: Hernández-Hernández
authors.affiliation: Centro de Calidad Ambiental, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Mejía-Velázquez
authors.affiliation: Escuela de Medicina del Tecnológico de Monterrey, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: Irma Elisa
authors.initials: IE
authors.lastname: Eraña-Rojas
authors.affiliation: Escuela de Medicina del Tecnológico de Monterrey, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: Leticia
authors.initials: L
authors.lastname: Elizondo-Montemayor
authors.affiliation: Escuela de Medicina del Tecnológico de Monterrey, Instituto Tecnológico y de Estudios Superiores de Monterrey, Monterrey, Nuevo León, México.
authors.forename: Luis
authors.initials: L
authors.lastname: Villela
mesh_terms: D000393:Air Pollutants / Q000009:adverse effects; D000740:Anemia / Q000097:blood / Q000453:epidemiology; D002648:Child; D003430:Cross-Sectional Studies; D004521:Educational Measurement; D004781:Environmental Exposure / Q000706:statistics & numerical data; D005260:Female; D005506:Food Contamination; D005742:Gasoline; D006400:Hematocrit; D006801:Humans; D007221:Industry; D007854:Lead / Q000097:blood*; D007855:Lead Poisoning / Q000097:blood / Q000453:epidemiology / Q000209:etiology; D008297:Male; D008800:Mexico / Q000453:epidemiology; D011446:Prospective Studies; D012494:Sampling Studies; D014505:Urban Population / Q000706:statistics & numerical data; D001335:Vehicle Emissions / Q000331:legislation & jurisprudence; D014874:Water Pollutants, Chemical / Q000009:adverse effects
chemical_list: D000393:Air Pollutants; D005742:Gasoline; D001335:Vehicle Emissions; D014874:Water Pollutants, Chemical; D007854:Lead