Inclusion Criteria:  All hospitalizations with at least one act of each surgery between January 1, 2019, and June 30, 2021 from the National Health Data System (SNDS) datanase.  SNDS is a set of strictly anonymous databases, comprising all mandatory national health insurance reimbursement data, particularly data derived from processing of health care claims (electronic or paper claims) and data from health care facilities (PMSI).  Exclusion Criteria:  Hospitalizations for personal identifier problems in the SNDS data