Diabetes is a complex metabolic disorder diagnosed on the basis of hyperglycemia. Diagnostic criteria for the disorder are periodically revised (1). Diabetes may be classified mainly into types 1 and 2 based on the etiology and severity of insulin deficiency (1). Most patients with type 1 diabetes show evidence of immune-mediated damage to the insulin-secreting β-cells. Diabetes is characterized by considerable morbidity and mortality. About 50% of patients with type 2 diabetes are not aware of having the disorder. Many patients are diagnosed with diabetes when being evaluated for a complication of diabetes. In contrast, patients with type 1 diabetes are dependent on insulin and need to be prescribed a complex insulin program consisting of rapidly absorbable insulin with each meal and long-acting insulin between meals and during the night. The incidence of type 1 diabetes has risen worldwide. The disorder is occurring earlier and is increasing even in regions with low prevalence (2). It is projected that the greatest increase in the prevalence of type 1 diabetes will occur in regions that currently have a low incidence (3). It is estimated that the incidence of type 1 diabetes in Finland will exceed 50/100,000 by the year 2010 (3). The Diabetes Control and Complica-progression of retinopathy and neuropathy (4). However, achieving long-term satisfactory glycemic control in people with type 1 diabetes is often diffcult in clinical pratice.