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Table 1 Secondary outcome parameters

From: Wear, bone density, functional outcome and survival in vitamin E-incorporated polyethylene cups in reversed hybrid total hip arthroplasty: design of a randomized controlled trial

1. polyethylene wear at 1, 3, 5 and 7 years postoperatively
2. relative decrease/increase in acetabular bone mineral density (BMD) at 1 and 2 years postoperatively
3. acetabular and proximal femoral osteolytic changes at 1, 3, 5, 7 and 10 years postoperatively
4. patient-reported functional outcome (HOOS and SQUASH) at 6 weeks and at 1, 3, 5, 7 and 10 years postoperatively
5. physician-reported functional outcome (Harris Hip Score) at 6 weeks and at 1, 3, 5 and 10 years postoperatively
6. survival (number of revisions) determined at 5 and 10 years postoperatively
  1. Other study parameters: gender, age, BMI, severity of arthrosis, complications, size and inclination of the cup, surgical time and intraoperative blood loss.