Development and Validation of Automated Indicators on the Appropriateness of Oral Anticoagulant Prescriptions

Inclusion Criteria: * Patients aged over 18; * Patients hospitalized at the Bordeaux University Hospital or the Georges-Pompidou European hospital for a clinical situation that could justify a prescription of oral anticoagulants or for an at risk situation in patients under oral anticoagulants, among targeted frequent clinical situations; * Patients hospitalized in medicine-surgery-obstetrics care or rehabilitation care (conventional hospitalization or outpatient) between the 1st of January 2015 and the 31th of December 2017; * Patients whose medical and administrative data are available in an electronic format in the hospital information system Exclusion Criteria: * Patients not hospitalized at the Bordeaux University Hospital or the Georges-Pompidou European hospital for a clinical situation that could justify a prescription of oral anticoagulants or for an at risk situation in patients under oral anticoagulants, among targeted frequent clinical situations; * Patients whose medical and administrative data are not available in an electronic format in the hospital information system; * Patients who do not give consent for research data use.