title: Epidemiology of IDDM in southern Chinese children in Hong Kong.
abstract: OBJECTIVE
  To provide reliable data on the incidence of IDDM in southern Chinese children in Hong Kong.
  
  
  METHODS
  A registry was established in 1991 to collect childhood IDDM cases retrospectively and prospectively from four districts in Hong Kong. The study included all newly diagnosed cases of IDDM with onset < 15 yr of age from 1 January 1986 to 31 December 1990. Primary ascertainment was based on review of medical records at a regional hospital serving the four districts. An independent school survey validated registry data.
  
  
  RESULTS
  The completeness of ascertainment was 93.8%. The age-standardized incidence of IDDM was 2.0/100,000/yr with the 95% confidence interval of 1.2-3.0/100,000/yr for children < 15 yr of age during the study period. The incidence rates/100,000/yr for the three age-groups were: < or = 4 yr, 0.8; 5-9 yr, 2.2; 10-14 yr, 2.8. The incidence for males was 1.5/100,000/yr (95% confidence interval 0.7-2.9/100,000/yr) and for females, 2.4/100,000/yr (95% confidence interval 1.3-4.0/100,000/yr).
  
  
  CONCLUSIONS
  This study documents a very low incidence rate of childhood IDDM in southern Chinese in Hong Kong.
authors.affiliation: Department of Pediatrics, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, N.T.
authors.forename: G W
authors.initials: GW
authors.lastname: Wong
authors.forename: S S
authors.initials: SS
authors.lastname: Leung
authors.forename: S J
authors.initials: SJ
authors.lastname: Oppenheimer
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D002681:China / Q000208:ethnology; D003922:Diabetes Mellitus, Type 1 / Q000453:epidemiology*; D005260:Female; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D012042:Registries; D012737:Sex Factors