title: Repeatability of the Pedar-X in-shoe pressure measuring system.
abstract: BACKGROUND
  The Pedar-X is one of the newer versions of in-shoe pressure measuring devices and the current study aimed to assess the repeatability of this device.
  
  
  METHODS
  Twenty-seven healthy male volunteers were recruited and requested to walk on a 26-feet walkway wearing appropriate sized standardised off-the-shelf neutral running shoes (Donnay International). The Pedar-X insole was sandwiched between the foot and the shoe. Data were collected on two occasions, one week apart. Clinically relevant parameters studied were contact area, contact time in percentage roll over process, maximum force, pressure-time integral, force-time integral, peak pressure, mean force and mean area.
  
  
  RESULTS
  Repeatability was analysed using the coefficient of variation. Of the 160 parameters considered, 93.1% revealed a coefficient of variation value of less than 25. Heel and the metatarsal head areas were the most repeatable.
  
  
  CONCLUSIONS
  The Pedar-X in-shoe pressure measuring system is repeatable and as such can be used as a valuable tool in the assessment of in-shoe plantar pressure distribution.
authors.affiliation: Institute of Motion Analysis & Research, Department of Orthopaedic and Trauma Surgery, TORT Centre, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK.
authors.forename: A K
authors.initials: AK
authors.lastname: Ramanathan
authors.forename: P
authors.initials: P
authors.lastname: Kiran
authors.forename: G P
authors.initials: GP
authors.lastname: Arnold
authors.forename: W
authors.initials: W
authors.lastname: Wang
authors.forename: R J
authors.initials: RJ
authors.lastname: Abboud
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D004867:Equipment Design; D005528:Foot / Q000502:physiology*; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D011312:Pressure; D012016:Reference Values; D015203:Reproducibility of Results; D012775:Shoes; D016138:Walking / Q000502:physiology*; D055815:Young Adult