title: First report on the nationwide incidence and prevalence of Type 1 diabetes among children in Turkey.
abstract: To report, for the first time, the incidence and prevalence of childhood Type 1 diabetes in Turkey using a nationwide registry.
  
  
  
  Information on birth date, city of birth, diagnosis date and gender of all patients with Type 1 diabetes aged < 18 years were obtained from the Turkish Social Security Institute for the period from January 2011 to December 2013.
  
  
  
  There were 17 175 prevalent cases of Type 1 diabetes over the 3-year period. The prevalence of Type 1 diabetes was 0.75/1 000 (95% CI 0.74-0.76) and was higher in girls than in boys (0.79 vs 0.72 /1 000; P < 0.01). There were 2465 incident cases in 2013. The incidence was slightly higher among girls (50.6%) than boys (49.4%); the girl:boy case ratio was 1.02. The incidence was 10.4/100 000 for boys and 11.3/100 000 for girls. The age-standardized incidence rate was 10.8 per 100 000 (95% CI 10.1-11.5) according to the WHO standard population, estimated using the direct method. The mean patient age at diagnosis was 10.6 ± 4.6 years. The highest proportion of cases (40.6%) was diagnosed in children aged 10-14 years.
  
  
  
  This is the first study to report the incidence and prevalence of Type 1 diabetes in children in Turkey. The incidence of Type 1 diabetes reflects the geographical location of Turkey, bridging Asia and Europe, with the incidence being higher than in Asia but lower than in Europe.
authors.affiliation: Gülhane Military Medical Academy, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: E
authors.identifier: 0000-0002-6343-9788
authors.initials: E
authors.lastname: Yeşilkaya
authors.affiliation: Gazi University Medicine School, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: P
authors.initials: P
authors.lastname: Cinaz
authors.affiliation: Keçiören Education and Research Hospital, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: N
authors.initials: N
authors.lastname: Andıran
authors.affiliation: Gazi University Medicine School, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Bideci
authors.affiliation: Kocaeli University Medicine School, Department of Pediatric Endocrinology, Kocaeli, Turkey.
authors.forename: Ş
authors.initials: Ş
authors.lastname: Hatun
authors.affiliation: Gülhane Military Medical Academy, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Sarı
authors.affiliation: Gülhane Military Medical Academy, Department of Biostatistics, Ankara, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Türker
authors.affiliation: Gülhane Military Medical Academy, Department of Biochemistry, Ankara, Turkey.
authors.forename: Ö
authors.initials: Ö
authors.lastname: Akgül
authors.affiliation: Gülhane Military Medical Academy, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Saldır
authors.affiliation: Turkish Social Security Institute, Ankara, Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Kılıçaslan
authors.affiliation: Gülhane Military Medical Academy, Department of Pediatric Endocrinology, Ankara, Turkey.
authors.forename: C
authors.initials: C
authors.lastname: Açıkel
authors.affiliation: School of Women's and Children's Health UNSW Medicine, Sydney, Australia.
authors.forename: M E
authors.initials: ME
authors.lastname: Craig
mesh_terms: D000293:Adolescent; D041923:Adolescent Development; D000367:Age Factors; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000453:epidemiology* / Q000208:ethnology; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D015995:Prevalence; D012042:Registries; D012306:Risk; D012737:Sex Factors; D014421:Turkey / Q000453:epidemiology