title: Assessment of bone ages: is the Greulich-Pyle method sufficient for Turkish boys?
abstract: BACKGROUND
  The Greulich-Pyle (GP) Atlas of skeletal maturation has been prepared in white children who born between 1917 and 1942 in the USA, and is frequently used for assessment of skeletal maturity. In this study, we investigated whether or not the GP method is sufficient for Turkish children for the determination of the skeletal age.
  
  
  METHODS
  Plain radiographies of left hands and wrists of 225 healthy boys between 7 and 17 years of age were taken. Pubic hair (PH) stages of boys were determined by using the Tanner criteria. Mean chronological ages and mean skeletal ages according to GP Atlas were compared for each age groups and each PH stage.
  
  
  RESULTS
  Mean skeletal ages were delayed 0.61, 0.72, 0.54, 0.39, 0.25, 0.39, and 0.32 years than the mean chronological ages in the 7-13 years age groups, respectively, and advanced 0.13, 0.01, 0.89, and 0.52 years in the 14-17 years age groups. In PH stages 1, 2, and 3, mean skeletal ages were delayed 0.67, 0.51 and 0.40 years than the mean chronological ages, respectively. In PH stages 4 and 5, mean skeletal ages were advanced 0.66 and 0.76 years than mean chronological ages.
  
  
  CONCLUSIONS
  The results suggest that Turkish boys may have a different tempo of skeletal maturation during pubertal development from that of American children which GP standards were derived. Therefore, GP Atlas is not completely applicable to Turkish boys but can be used with some modification.
authors.affiliation: Department of Pediatrics, Faculty of Medicine, Harran University, 63 100 Sanliurfa, Turkey. ahmetkoc1@hotmail.com
authors.forename: A
authors.initials: A
authors.lastname: Koc
authors.forename: M
authors.initials: M
authors.lastname: Karaoglanoglu
authors.forename: M
authors.initials: M
authors.lastname: Erdogan
authors.forename: M
authors.initials: M
authors.lastname: Kosecik
authors.forename: Y
authors.initials: Y
authors.lastname: Cesur
mesh_terms: D000293:Adolescent; D000365:Age Determination by Skeleton / Q000379:methods*; D000367:Age Factors; D002648:Child; D006225:Hand / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D011627:Puberty / Q000502:physiology; D012016:Reference Values; D014421:Turkey; D014953:Wrist / Q000000981:diagnostic imaging