title: [The intelligence quotient and malnutrition. Iron deficiency and the lead concentration as confusing variables].
abstract: This study gave us the opportunity to know the roles iron deficiency and the presence of lead in blood play, as confounding variables, in relation to the state of malnutrition and the intellect of those children. A sample of 169 school children were classified according to their state of nutrition, their condition in reference to serum iron and lead concentrations. In addition, their intelligence was evaluated. The results confirmed that those children with lower weights and heights registered lesser points of intelligence; in fact, iron deficiency cancels out the difference in favor of those taller and weighing more. Lead did not contribute as a confounding variable, but more than half of the children showed possible toxic levels of this metal.
authors.affiliation: Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México.
authors.forename: L
authors.initials: L
authors.lastname: Vega-Franco
authors.forename: A M
authors.initials: AM
authors.lastname: Mejía
authors.forename: B
authors.initials: B
authors.lastname: Robles
authors.forename: L
authors.initials: L
authors.lastname: Moreno
authors.forename: Y
authors.initials: Y
authors.lastname: Pérez
mesh_terms: D000747:Anemia, Hypochromic / Q000097:blood / Q000453:epidemiology / Q000523:psychology; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D005260:Female; D006801:Humans; D007360:Intelligence / Q000502:physiology*; D007361:Intelligence Tests; D007501:Iron / Q000097:blood; D000090463:Iron Deficiencies; D007854:Lead / Q000097:blood*; D008297:Male; D008800:Mexico / Q000453:epidemiology; D009748:Nutrition Disorders / Q000097:blood / Q000453:epidemiology / Q000523:psychology*
chemical_list: D007854:Lead; D007501:Iron
vernacular_title: Cociente intelectual y desnutrición. La deficiencia de hierro y la concentración de plomo como variables confusoras.