Reliability of Goniometric Measurements of Hip Motion in Spastic Cerebral Palsy

Abstract
Reliability of goniometric measurements of ranges of motion in the right hip of 4 children with mild or moderate spastic diplegia was studied by comparing results when physical therapists used specific and non-specific measurement instructions. Measurements of hip extension, abduction and external rotation were made. The use of specific measurement instructions improved inter-rater reliability only in the case of external rotation. Inter-session reliability was not improved by the use of specific measurement instructions. Goniometric measurements have such a low level of reliability that they can only be used to assist clinical judgment, and they are not sufficiently reliable to be used in studies of cerebral palsy.

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