title: Repeatability of body sway measurements; day-to-day variation measured by sway magnetometry.
abstract: The postural stability of 30 normal subjects in the age range 15 to 64 years was measured on five separate occasions, using the sway magnetometry technique, to determine the day-to-day repeatability of this measurement technique. On each occasion the pathlength and area enclosed by movement of the hips in a horizontal plane were measured over two 30 s periods with eyes open and eyes closed, with subjects standing on a firm base. Day-to-day repeatability had a standard deviation of 14% for pathlength and 42% for area. Neither the age nor the sex of the subject had any demonstrable effect on the results.
authors.affiliation: Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, UK.
authors.forename: C
authors.initials: C
authors.lastname: Elliott
authors.forename: A
authors.initials: A
authors.lastname: Murray
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006615:Hip / Q000502:physiology*; D006801:Humans; D008280:Magnetics; D008297:Male; D008875:Middle Aged; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology; D015203:Reproducibility of Results