title: [Growth secular trend during early childhood in Northern Spain].
abstract: OBJECTIVE
  To check whether secular changes exist in growth pattern of caucasic children from the North of Spain up to 2 years of age compared with 25-30 years ago population growth curves.
  
  
  METHODS
  Longitudinal study of a representative cohort of caucasic infants born a term in Aragon (n=1.099). Standard deviation scores (z-scores) for weight, length and body mass index (BMI) have been calculated by two available 25-30 years ago population growth curves (Sobradillo et al. and Ferrández et al.).
  
  
  RESULTS
  At all ages, weight, length and BMI mean z-scores significantly vary depending on the growth standard curve used (p≤0.001). At birth, weight z-score is -0.36 (95%CI:-0.42;-0.30) according to Sobradillo et al. and -0.26 (95%CI:-0.29;0.33) according to Ferrández et al. These differences decreased progressively becoming minimum at 2 years (mean weight z-score -0.08 and -0.05; respectively). At this age, length mean z-score is +0.54 (95%CI:0.48;0.61) according to Sobradillo et al. and +0.19 (95%CI:0.12;0.25) according to Ferrández et al. Mean BMI z-scores of our sample showed lower values than selected standards.
  
  
  CONCLUSIONS
  Current birth weight of caucasic infants from Northern Spain is lower than in the previous generation. At 2 years of age there is a trend of increasing length, with a similar weight, resulting in lower BMI values.
authors: Grupo de Investigación GENUD (Growth, Exercise, Nutrition and Development) Universidad de Zaragoza. Zaragoza. España.. gereva@comz.org.
authors: Beatriz
authors: B
authors: Oves Suárez
authors: Departamento de Pediatría, Radiología y Medicina Física. Universidad de Zaragoza. Zaragoza. España. Hospital Clínico Universitario Lozano Blesa. Zaragoza. España. 4Departamento de Nutrición y Bromatología. Universidad del País Vasco. UPV/EHU. Vitoria. España..
authors: M Pilar
authors: MP
authors: Samper Villagrasa
authors: Departamento de Pediatría, Radiología y Medicina Física. Universidad de Zaragoza. Zaragoza. España. Hospital Clínico Universitario Lozano Blesa. Zaragoza. España. 4Departamento de Nutrición y Bromatología. Universidad del País Vasco. UPV/EHU. Vitoria. España..
authors: Laura
authors: L
authors: Escartín Madurga
authors: Grupo de Investigación GENUD (Growth, Exercise, Nutrition and Development) Universidad de Zaragoza. Zaragoza. España..
authors: M Luisa
authors: ML
authors: Álvarez Sauras
authors: Grupo de Investigación GENUD (Growth, Exercise, Nutrition and Development) Universidad de Zaragoza. Zaragoza. España..
authors: Luis A
authors: LA
authors: Moreno Aznar
authors: Grupo de Investigación GENUD (Growth, Exercise, Nutrition and Development) Universidad de Zaragoza. Zaragoza. España..
authors: Idoia
authors: I
authors: Labayen Goñi
authors: Grupo de Investigación GENUD (Growth, Exercise, Nutrition and Development) Universidad de Zaragoza. Zaragoza. España. Departamento de Pediatría, Radiología y Medicina Física. Universidad de Zaragoza. Zaragoza. España. Hospital Clínico Universitario Lozano Blesa. Zaragoza. España. 4Departamento de Nutrición y Bromatología. Universidad del País Vasco. UPV/EHU. Vitoria. España.. gereva@comz.org.
authors: Gerardo
authors: G
authors: Rodríguez Martínez
mesh_terms: D001724:Birth Weight / Q000502:physiology; D015992:Body Mass Index; D015331:Cohort Studies; D005260:Female; D006128:Growth / Q000502:physiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008137:Longitudinal Studies; D008297:Male; D013030:Spain / Q000453:epidemiology