Publication

Analyzing 180 degrees turns using an inertial system reveals early signs of progression of Parkinson's disease

Kamiar Aminian, Arash Salarian
2009
Conference Papers

Abstract

Changes in turning are one of the early motor deficiencies in Parkinson's Disease (PD). We have proposed a system based on wearable, inertial sensors and a novel automatic analysis algorithm that can assess 180 degrees turns. Twelve patients in early stages of PD and 14 age-matched healthy subjects were enrolled in this study. Inertial sensors were attached on shanks and sternum. Measurement protocol included walking on a straight pathway, turning 180 degrees and returning back. Subjects were measured 4 times, once every 6 months during an 18 months period. At the baseline, 9 subjects from each group repeated the test twice to assess test-retest reliability. Patients with mild PD had a very low Postural Instability Gait Difficulty (PIGD subscore of UPDRS III) score (average 0.67, min 0, max 3). The analysis showed that the patients had a significantly longer turning duration (2.18+/-0.43 vs. 1.79+/-0.27 seconds, p

Official source

https://infoscience.epfl.ch/entities/publication/9aa52846-50c3-4009-9eef-71ef1c418edb

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Kamiar Aminian, Arash Salarian
2009
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9aa52846-50c3-4009-9eef-71ef1c418edb

About this result

Related concepts (29)

Reliability (statistics)

In statistics and psychometrics, reliability is the overall consistency of a measure. A measure is said to have a high reliability if it produces similar results under consistent conditions:"It is the characteristic of a set of test scores that relates to the amount of random error from the measurement process that might be embedded in the scores. Scores that are highly reliable are precise, reproducible, and consistent from one testing occasion to another.

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