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1. 2951 people screened with diabetes admitted to hospital for COVID-19 from March 10 to April 10, 2020 2854 patients reviewed for availability of the main outcome 97 patients (3.3%) ruled out for at least one of the following non- inclusion criteria: 35 not admitted for COVID-19 or transfe rred from an other hospital 47 without confirmed diabetes mellitus 19 with legal protection 19 database duplicates 8 opposition to use of personal data 3 not admitted during the proper time window 2820 patient s 34 patients (1.2%) excluded because of at least one data not available for key outcome s 10 with tracheal intubation occurring before admission 24 with missing data on main outcome , including 7 with missing data on death 22 with missing data on tracheal intubation FIGURE S1 . Flow diagram 2442 patients treated for diabetes before hospitalisation 2237 patients with T2D, candidates for matched sample 176 controls ( avg . 2.6 per NOD patient) in the matched sample 205 patients (9.1% without T2D) 226 patients excluded on HbA 1c criterium 67 patients (17.7%) with known HbA 1c ≥ 6.5% before hospitalisation 185 patients (48.9%) without HbA 1c during hospitalisation l’hospitalisation or < 6.5% 378 patient s not treated for diabetes before hospitalisation 152 patient s not treated for diabetes before hospitalisation and with HbA 1c compatible with NOD 69 patients (46.3%) with known history of diabetes reported during hospitalisation 3 patients (2.0%) with known diabetic retinopathy 149 patients not treated for diabetes before hospitalization, with HbA 1c compatible with NOD and without known diabetic retinopathy 80 patient s included as NOD 13 unmatched patients (16.2%) regarding sex , center and age (+/- 5 y) 67 NOD patient s (83.8%) in the matched sample 2061 patients not selected for matched sample