hta_ knee intro.qxp - Ministero della Salute

We initially intended to compare revision rates at 5 years for each knee system using performance
data from both clinical studies and arthroplasty registers. Due to the lack of high quality
studies we decided not to perform this kind of comparison. Although we noted that the knee
systems for which we identified clinical studies are among the most used in Italy, we also noted
that this number was very low (four models only).
However we recognise that our inclusion criteria were extremely stringent as they are based
only on the names of the knee systems used with certainty in Italy, and we excluded groups of
patients aged 50 and below and only considered a minimum follow-up of 5-years.
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