[Incidence of insulin-dependent diabetes mellitus in the metropolitan region]. / Incidencia de diabetes mellitus insulinodependiente en la región metropolitana.

We used a retrospective search and confirmation method to establish the number of new cases of insulin dependent diabetes mellitus diagnosed between Jan 1, 1986 and Dec 31, 1989 in subjects under 15 years of age in the Metropolitan region of Chile. All hospitals and outpatient facilities of the National Health Service, other hospitals and private offices of endocrinologists and specialists in diabetes were surveyed, as well as the registry from the Juvenile Diabetes Foundation. A total of 115 cases, 52 in males and 63 in females were found, for an annual incidence of 1.69 and 2.15 per 100,000, respectively. Overall, the annual incidence rates were 2.22 in 1986, 1.22 in 1987 (p < 0.001), 2.13 in 1988 and 2.09 in 1989. A greater number of cases was diagnosed at age 4 in males and at age 12 in females (p < 0.001). The greater number of cases were diagnosed from June to August (winter) and the lowest in October (p < 0.001).

[Prevalence of insulin dependent diabetes mellitus in school children of the metropolitan area]. / Prevalencia de diabetes mellitus insulinodependiente en escolares de la region metropolitana.

The prevalence of insulin dependent diabetes mellitus was determined in 1,078,109 students of 2,150 schools between 5 and 19 years of age. 147 diabetic females and 107 diabetic males were found, for a prevalence of 25/100,000 in females and 20/100,000 in males (p less than 0.01). Prevalence of diabetes among 3 age groups, 5-9, 10-14 and 15-19 years, was 17, 22 and 19 per 100,000 in males and 22, 32 and 28 per 100,000 in females, respectively. The higher prevalence in females was significant at all age levels. Overall prevalence according to age was 19, 27 and 24 per 100,000 in the corresponding age groups (significantly higher in the 10-14 year old age group, p less than 0.01).