Subjects recruitment and eligibility criteria
cognitive impairment
All participants were identified from the prosthetics clinic at the SRT National Prosthetic Center, Indianapolis, USA. Potential subjects were initially screened for their eligibility to participate in the study. The study team then verified if an identified subject was interested in participating in the study. If interest was expressed at this point, the study team made an appointment for signing the informed consent form followed by evaluation by a certified study prosthetist confirming all eligibility criteria to participate in the study were met.The subjects were deemed eligible to participate in the study if the following inclusion and exclusion criteria were met: (1) subjects of age more than 18 years; (2) body weight in the range of 50–136 kg; (3) no cognitive impairment; (4) unilateral or bi-lateral transfemoral amputation; (5) able to walk on a treadmill for 20 min; (6) using Seal-In Silicone Liner and Direct Socket (Össur). The subjects were using the same liner profile and the same socket material as for direct socket. The AeroFit is a variant of the direct socket transfemoral (DSTF)