Inclusion Criteria:  Prospective cohort study:  Patients with intertrochanteric fractures that need a surgical fixation and under treatment with a DOAC medication  Control group:  Patients with intertrochanteric fractures under DOAC medication with a delayed surgical fixation from January 2014 to December 2018 (≥ 48 hours after the trauma)  Exclusion Criteria:  Prospective cohort group:  patients with multiple fractures acute heart failure, kidney and lung failure and other concomitant diseases which prevent prompt fixation  Retrospective cohort group:  Patients with delayed surgical fixation due to other causes than DOAC medication (e.g. multimorbidity, acute myocardial infarction, acute heart, lung or kidney failure)