Incidence of type 1 diabetes in 0 to 14 year olds in Australia from 2002 to 2017

Pediatr Diabetes. 2020 Aug;21(5):707-712. doi: 10.1111/pedi.13025. Epub 2020 May 31.


Objective: To determine the incidence of childhood onset type 1 diabetes in Australia from 2002 to 2017, and analyze incidence rate trends by calendar year, sex, and age at diagnosis.

Research design and methods: Children newly diagnosed with type 1 diabetes aged <15 years between 2002 and 2017 were identified from the National Diabetes Register, estimated to be ~99% complete. Data were obtained for diagnosis year, sex, age, and residential State/Territory at time of diagnosis. Population estimates by year, sex, single year of age, and State/Territory were obtained from the Australian Bureau of Statistics and Poisson regression used to examine incidence and trends by calendar year, sex, and age group at diagnosis.

Results: Between 2002 and 2017, there were 16 783 newly diagnosed cases of type 1 diabetes in children aged < 15 years (8684 boys: 8099 girls), giving a mean incidence of 25.0/1 00 000 person years (95%CI: 24.6, 25.4). A sinusoidal pattern in the incidence rate trend was observed with 5-yearly cycles providing the best model fit. No significant difference was observed in boys compared to girls (IRR 0.98 [95%CI: 0.95, 1.01]). Compared to 0 to 4 year olds, the mean incidence was 75% higher in 5 to 9 year olds, and 224% higher in 10 to 14 year olds. A decreasing incidence rate trend was observed in 0 to 4 year old boys and girls.

Conclusions: This study reports updated incidence and incidence rate trends in children and adolescents diagnosed with type 1 diabetes in Australia. A cyclical pattern in incidence trend persists, with an overall decreasing trend observed only in the youngest age group.

Keywords: Australia; epidemiology; pediatric; type 1 diabetes.

Publication types

  • Historical Article

MeSH terms

  • Adolescent
  • Age of Onset
  • Australia / epidemiology
  • Child
  • Child, Preschool
  • Diabetes Mellitus, Type 1 / epidemiology*
  • Diabetes Mellitus, Type 1 / history
  • Female
  • History, 21st Century
  • Humans
  • Incidence
  • Infant
  • Infant, Newborn
  • Male
  • Registries