Interventions and Assessments
knee arthroplasty, death, Death
Patients in the aspirin group received oral aspirin 100 mg daily for 35 days after hip arthroplasty and for 14 days after knee arthroplasty, beginning within 24 hours postoperatively. Patients in the enoxaparin group received subcutaneous enoxaparin 40 mg daily for the same time periods, with the dose reduced to 20 mg for patients weighing less than 50 kg and for patients with an estimated glomerular filtration rate less than 30 mL/min/1.73 mData from all patients included in this study were obtained through the AOANJRR. The AOANJRR routinely collects demographic and outcome data for all patients undergoing hip or knee arthroplasty in Australia, including age, sex, body mass index (BMI; calculated as weight in kilograms divided by height in meters squared), American Society of Anesthesiologists (ASA) classification,Mortality data within 90 days of surgery were collected through linkage between the AOANJRR and the National Death Index. The National Death Index is a national database administered by the Australian Institute of Health and Welfare that relies on data submitted by jurisdictional death registers. A quality statement on the national death index is available elsewhere.