Inclusion Criteria:  All patients (adults and adolescents) with diabetes and an insulin pump initiation from 1 January 2015 to 30 June 2018 in the diabetes department of the Centre hospitalier sud francilien.  Exclusion Criteria:  Pregnant women (or women planning pregnancy in the short term) with an insulin pump initiation from 1 January 2015 to 30 June 2018 Patients hospitalized for an insulin pump replacement or change between 1 January 2015 and 30 June 2018. Patients with a history of insulin pump initiation within a period of less than 6 months before a new pump start between 1 January 2015 and 30 June 2018.