['To characterize the clinical features and biochemical status at presentation of diabetic ketoacidosis (DKA) in different age groups of children, and to analyze the outcomes of a certain treatment protocol.', 'We reviewed records of patients with DKA who were admitted to our hospital between January 2007 and December 2010. Patients were divided into three subgroups according to age, and the results were compared between these groups.', 'One hundred thirty-four episodes in 111 patients (64 females, 47 males) were analyzed. Of these 134 episodes, 60% was in patients with new-onset diabetes and 40% was in those with established diabetes. Patients younger than 5 years had lower C-peptide and HbA1c levels than older patients at clinical onset. They were also given more alkali therapy. The initial conscious level was found closely related to plasma osmolality and serum sodium levels. Seven of 11 patients with recurrent DKA were females. No major complication was observed.'] Are clinical features and management of diabetic ketoacidosis in different age groups of children : children less than 5 years of age at higher risk of metabolic decompensation?