Patients
PROM, tumor
TUMOR
Study nurses and/or physicians aimed to include all eligible patients in the trial. Patients 18 years of age or older with prespecified surgery codes for hip replacement and knee replacement were included. Exclusion criteria were emergency and life-threatening cases, tumor prothesis, American Society of Anesthesiologists classifications 4 to 6, and patients without email access or without a relative supporting the PROM response. Randomization was triggered automatically at hospital discharge via the PROM-IT-software. A total of 6807 patients were included in the final analysis (