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. 2004 Jan 26;2004(1):CD003978. doi: 10.1002/14651858.CD003978.pub2

Perry 1997.

Methods Quasi‐randomised controlled trial. 
 Within‐subject, cross‐over design.
Participants 10 men with vascular transtibial amputation, mean age 62.4 years (range 49‐72), with completely healed amputation and residual stump volume stability. All participants were fitted with a prosthesis that allowed interchange of the foot components. 
 Country: USA
Interventions 1. Single Axis 
 2. Seattle Lite 
 3. Flex‐foot 
 Gait analyses were done at a self‐selected velocity over a level 10m walkway with a force plate. Foot switches were taped to the soles of the shoes to calculate stride characteristics and foot‐floor contact patterns. Reflective markers were placed at anatomical landmarks.
Outcomes 1. gait velocity 
 2. cadence 
 3. stride length 
 4. foot floor contact patterns 
 5. joint motion in the sagittal plane
Notes Each foot was worn for approximately 1 month prior to testing.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? High risk C ‐ Inadequate