Quality management has been applied in recent years to improve the care of children and adolescents with insulin dependent diabetes mellitus (IDDM). In 1995 the German Paediatric Diabetology Working Group published standards on quality control, in which relevant parameters on structure, process and outcome of care were defined. A computer software programme-developed at the University of Ulm under the auspices of the German Secretary of Health-has been used for quality control with central anonymous analysis in a nationwide survey. Data from 23 paediatric centres with 2407 patients seen between January and June 1996 were evaluated. The results showed an admission rate to hospital of 23.8 per 100 patient-years with an average duration of in-patient stay of 2.74 days/year. 80% of the patients were treated with an intensive insulin therapy regimen comprising three or more injections daily. The overall metabolic control was reasonably good with a mean HbA1c value of 7.8%. The rate of severe hypoglycaemia complicated by coma and/or convulsions was six per 100 patient-years and of ketoacidosis one per 100 patient-years. Unfortunately screening for diabetic retinopathy and nephropathy was not carried out consistently. The incidence was 44% and 33% respectively.