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Reliability of the ISO Wheelchair Cushion Test for Loaded Contour Depth

By Sprigle, Stephen, PhD, PT; Press, Larry; Assistive Technology, Vol. 15, No. 2, pp. 145-150
Publication Date: Winter 2003

Study conducted to determine the reliability of overload deflection tests and the Loaded Contour Depth (LCD) test, which is one of the testing methods included in the International Organization for Standardization protocols for wheelchair cushions. The LCD measures the depth of immersion into a cushion via an LCD jig, which can be mounted to any standard mechanical testing system. The test rig must be able to measure displacement to 1 millimeter while imparting a load up to 20 kilograms. The LCD and overload deflection tests were repeated on 17 cushions, and intraclass correlation coefficient and repeatability coefficient were calculated. The reliability of both test were determined to be very high. The authors conclude that LCD measurements can be used to differentiate cushions that vary by at least 1 centimeter. The overload test was determined to be valid as a criterion-referenced measure.
Published by: Rehabilitation Engineering & Assistive Technology Society of North America (RESNA)   (Website:http://www.resna.org)

This publication is included in the library of the National Rehabilitation Information Center (NARIC), accession number J47479
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