Aims/hypothesis We determined the impact of insulin pump therapy on long-term glycaemic control, BMI, rate of severe hypoglycaemia and diabetic ketoacidosis (DKA) in children. Methods Patients on pump therapy at a single paediatric tertiary hospital were matched to patients treated by injections on the basis of age, duration of diabetes and HbA 1c at the time of pump start. HbA 1c , anthropometric data, episodes of severe hypoglycaemia and rates of hospitalisation for DKA were collected prospectively.