ABSTRACT
The 5-year results of the incidence study of insulin-dependent diabetes mellitus (IDDM) in children (0-14 years) and young adults (15-29 years) which began in Warsaw on 1 July 1983 are presented. The overall number of new IDDM patients aged 0-29 registered in Warsaw during 5 years was 165. The average incidence rates in the age groups 0-14 and 15-29 were respectively 5.2 and 6.5 per 100,000 population in males and 4.5 and 4.4 in females. The highest incidence was observed in the age groups 25-29, 10-14 and 15-19 in males, and 5-9 and 25-29 in females. More patients reported the onset of their first symptoms in autumn and winter than in spring and summer. The IDDM incidence rates in Warsaw appear to be lower than those in some other countries for which data on IDDM at ages 0-29 years are available.