Inclusion Criteria:  Adult patient (≥ 18 years old) Diabetic patient (type 1 or type 2) regardless of their diabetes treatment who experienced complete confinement in their own home, in France. Patients who had a measured HbA1 or an estimated HbA1c with a glucose sensor Freestyle libre with a known result, between November 1, 2019 and February 29, 2020. Patients agreeing to have their HbA1c measured between May 15 and July 31, 2020. Having been informed of the study and not objecting to participating in it  Exclusion Criteria:  - Adults over the age of legal protection (safeguard of justice, curatorship, guardianship), persons deprived of their liberty.