title: [Vitamin D blood levels of students in grades IV-Vl of primary schools in Katowice].
abstract: Results of studies conducted around the world show a drastic deficiency vitamin D in almost all populations, and the strongest in the group of children and the elderly. The aim of this study was to evaluate the concentration of vitamin D in children aged 10-12 years.
  
  
  
  The study included 42 children aged 10-12 years 24 girls and 18 boys).The obtained data were statistically analyzed using STATISTICA 10 (StatSoft Inc. Dell)
  
  
  
  Half of the subjects (n = 21) had levels of vitamin D i not greater than 14.872 ng/ml (median). The median concentrations of vitamin D was higher in the studied group of boys than girls and amounted to 16.54 vs 14.02. Most patients (n = 18; 42.8%) had levels of vitamin D between 10 and 20 ng / ml (deficiency),7 persons (16.7%) had a severe deficiency (≤10 ng/ml), a significant number of patients (n = 15; 35 7%) had a slight deficiency of vitamin D called moderate hypovitaminosis. Only two individuals (4.8%) had concentrations in the range defined as optimum.
  
  
  
  The results of the present study show a deficiency of vitamin D in the study group children aged 10 - 12 years.
authors.forename: Ryszard
authors.initials: R
authors.lastname: Braczkowski
authors.forename: Bogumiła
authors.initials: B
authors.lastname: Braczkowska
authors.forename: Piotr J
authors.initials: PJ
authors.lastname: Stryjewski
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Kuczaj
authors.forename: Gamal
authors.initials: G
authors.lastname: Al-Srory
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D011044:Poland / Q000453:epidemiology; D015995:Prevalence; D012307:Risk Factors; D012574:Schools / Q000706:statistics & numerical data; D012621:Seasons; D012727:Sex Characteristics; D013334:Students / Q000706:statistics & numerical data*; D014807:Vitamin D / Q000097:blood*; D014808:Vitamin D Deficiency / Q000097:blood* / Q000175:diagnosis / Q000453:epidemiology*
chemical_list: D014807:Vitamin D