Cost-utility analysis of total hip arthroplasties - Technology assessment of surgical procedures by mailed questionnaires

A retrospective study comparing 700 consecutive total hip arthroplasties, u tilizing four types of implants, was performed. Questionnaires based on hip scores were sent to 593 living patients. Useful responses were received fr om 363 (61%) patients, Hip scores and quality-adjusted life-years were calc ulated. Multiple regression analysis, controlling for all possible biases, demonstrated one cementless implant as superior to all others. We believe t hat the use of mailed questionnaires is a simple and convenient system of f ollow-up, saving patients the need for outpatient clinic visits. The validi ty of such replies, however, has yet to be established.