title: [Prospective studies on dynamics of depression from preadolescence to early adolescence].
abstract: OBJECTIVE
  The aim of the study is to evaluate the changes in prevalence and dynamics of depression during puberty. It was conducted in prospective studies in a representative group of large-town primary school students.
  
  
  METHODS
  A group of 1993, 10 year-old students were chosen in a two-stage draw. They were studied with the Karków Depression Inwentory (KID) in the subsequent years 2001, 2002, 2003.
  
  
  RESULTS
  The point prevalence of depression was respectively 29%, 30% and 26% for 10, 11 and 12 year-olds. The spread-out rate of depressive disorder was relatively stable.
  
  
  CONCLUSIONS
  Depression is more common in pre-adolescent boys than girls. The dynamics of the disorder, when studied in these three years show that depression is a disorder with a very unequivocal course amongst the preadolescents.
authors.affiliation: Klinika Psychiatrii Dzieci i Młodzie2y Collegium Medicum UJ.
authors.forename: Jacek
authors.initials: J
authors.lastname: Bomba
authors.forename: Renata
authors.initials: R
authors.lastname: Modrzejewska
mesh_terms: D000293:Adolescent; D002648:Child; D003863:Depression / Q000175:diagnosis* / Q000453:epidemiology*; D003866:Depressive Disorder / Q000175:diagnosis* / Q000453:epidemiology*; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D011044:Poland / Q000453:epidemiology; D015995:Prevalence; D011446:Prospective Studies; D000297:Psychology, Adolescent; D012307:Risk Factors; D012720:Severity of Illness Index; D017678:Sex Distribution; D012737:Sex Factors; D012931:Social Environment; D014505:Urban Population / Q000706:statistics & numerical data