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Prediction of slips: an evaluation of utilized coefficient of friction and available slip resistance

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The purpose of this study was to investigate the relationship between measures of floor surface slip resistance and an individual's peak utilized coefficient of friction (COF U ) on the probability of a slip occurring during level walking. Video, kinematic and ground reaction force data were recorded simultaneously as subjects walked at a self-selected speed during conditions of normal and reduced floor surface slip resistance. Peak COF U during weight acceptance was calculated and the available floor surface slip resistance was measured using the variable incidence tribometer (VIT). Separate logistic regression analyses identified that knowledge of the available slip resistance (as measured by the VIT) in combination with an individual's peak COF U allowed for greater accuracy in classifying slip outcomes (89.5%; p  = 0.004), while knowledge of only the available slip resistance reduced the accuracy of categorization to 78.9% ( p  = 0.021).
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Keywords: Coefficient of friction; Slip resistance; Slips and falls; Tribometer; Walking

Document Type: Research Article

Affiliations: Movement Sciences Center, Institute for Rehabilitation Science and Engineering, Madonna Rehabilitation Hospital, 5401 South Street, Lincoln, NE, 68506–2134, USA

Publication date: August 15, 2006

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