title: Constitutional advancement of growth is associated with early puberty in girls.
abstract: BACKGROUND
  Constitutional advancement of growth (CAG) is the growth pattern of early growth acceleration that has been shown to be characteristic in girls with idiopathic precocious puberty (IPP). The aim of this study was to examine the growth pattern of girls with early puberty compared to girls with IPP.
  
  
  METHODS
  We studied the growth pattern, from birth to presentation, of 61 girls with early puberty, of 40 girls with IPP and of 100 healthy girls with normal pubertal onset that served as controls.
  
  
  RESULTS
  Height SDS (HSDS) at presentation was significantly different among the 3 groups (p < 0.001). Girls with early puberty were shorter than girls with IPP (HSDS 0.63 ± 1.09 vs. 0.98 ± 0.95, respectively, p < 0.001) and taller than control girls (HSDS 0.05 ± 0.94, p < 0.05). By comparing the linear growth pattern from birth to presentation, pairwise comparisons showed that it differed significantly between early puberty and control (p < 0.001) as well as between IPP and control girls (p < 0.001), whereas the difference between girls with IPP and early puberty was not significant (p = 0.09).
  
  
  CONCLUSIONS
  Girls with early puberty present the pattern of CAG suggesting that IPP lies at the extreme of the distribution of the normal timing of puberty onset.
authors.affiliation: Third Department of Pediatrics, University of Athens School of Medicine, Attikon University Hospital, Rimini 1 Street, Haidari, Athens, Greece. anpapad@med.uoa.gr
authors.forename: Anastasios
authors.initials: A
authors.lastname: Papadimitriou
authors.forename: George
authors.initials: G
authors.lastname: Kanakis
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Douros
authors.forename: Dimitrios T
authors.initials: DT
authors.lastname: Papadimitriou
authors.forename: Anastasios H
authors.initials: AH
authors.lastname: Boutsiadis
authors.forename: Polyxeni
authors.initials: P
authors.lastname: Nicolaidou
authors.forename: Andreas
authors.initials: A
authors.lastname: Fretzayas
mesh_terms: D001827:Body Height; D002648:Child; D005260:Female; D006128:Growth / Q000502:physiology*; D006130:Growth Disorders / Q000150:complications*; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008137:Longitudinal Studies; D011627:Puberty / Q000502:physiology; D011629:Puberty, Precocious / Q000150:complications*