<qa>  What is the risk of amputees falling because of their physical ability, associated disability andModerately active amputees may have lost their limb due to diabetes, vascular conditions, trauma, tumour or congenital causes. These amputees currently cannot benefit from having a computerised knee because of the performance criteria associated with being given one. However, these amputees have a very high risk of falling because they use a non microprocessor controlled knee joint NMPK and because their physical ability, associated disability and persistent contralateral leg weakness do not allow them to compensate for a balance deficit. These amputees restrict how much they move around and their participation because of their instability and elevated risk of falling. 