Using fractal dimension derived from trajectory measured by motion sensing carpet to assess wandering behaviors of dementia patients
Chang, W.-Y. Chang, K.-W. Hsu, Y.-L.
DOI:10.6283/JOCSG.2015.3.3.333
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中文摘要 Wandering is a prevalent behavior in dementia patients. Warren (1999) compared the frequency of wandering. Of the 638 community-residing dementia patients examined, wandering behavior occurred in 17.4% of participants. It was significantly more prevalent in patients with Alzheimer dementia than those with vascular dementia or other dementia. Martino-Saltzman et al. (1991), characterize ambulation in older people with dementia according to its geographical pattern as direct, lapping, pacing, or random. Travel efficiency (percentage of direct travel) was significantly related to cognitive status (r =0.56), with inefficient travel most prevalent in severely demented participants.
In recent years, a variety of assistive technologies based on “ambient-assisted living” (AAL) tools are developed to assess the wandering behavior. Kim et al. (2009) tried to distinguish wandering patterns from normal patterns in a nursing home by using triaxial accelerometer sensors. Campo et al. (2010) developed methods for determining normal trajectory classes and triggering alarms when the trajectories are unusual by using infrared sensors. Vuong et al. (2014) automatically classify wandering patterns of dementia patients with active RFID system based on the Martino–Saltzman typology into direct, random, pacing, and lapping patterns. Kearns (2010) used “fractal dimension” (Fractal D), a measure of movement path tortuosity (directed vs. irregular or apparently aimless locomotion) to access wandering behaviors of dementia patients. Ultra-wideband sensors were used to measure day time locomotion to an accuracy of 20 cm in 14 elderly residents in an assisted living facility. Fractal D was found to be significantly and negatively correlated with cognitive status as measured by the Mini Mental State Examination (MMSE) administered to each participant at the study’s end. The purpose of the research is to use fractal dimension derived from trajectory measured by motion sensing carpet to assess wandering behaviors of dementia patients. In the initial study, this system has been implemented in the rooms of 4 demented older adults to collect data.
文章建立時間：2015-06-15
引用格式(APA)：
Chang, W.-Y. Chang, K.-W. Hsu, Y.-L.(2015)。 Using fractal dimension derived from trajectory measured by motion sensing carpet to assess wandering behaviors of dementia patients。
福祉科技與服務管理學刊， 3(3)， 333-334。