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Repeatability of body sway measurements; day-to-day variation measured by sway magnetometry

Lookup NU author(s): Emeritus Professor Alan MurrayORCiD


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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.

Publication metadata

Author(s): Elliott C, Murray A

Publication type: Article

Publication status: Published


Year: 1998

Volume: 19

Issue: 2

Pages: 159-164

Print publication date: 01/05/1998

ISSN (print):

ISSN (electronic):