The harmonic ratio of trunk acceleration predicts falling among older people: results of a 1-year prospective study

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• 作者：Takehiko Doi (1) (2)
  Soichiro Hirata (3)
  Rei Ono (4)
  Kota Tsutsumimoto (1) (2)
  Shogo Misu (2)
  Hiroshi Ando (2)
  
• 关键词：Trunk ; Gait ; Acceleration ; Falls
• 刊名：Journal of NeuroEngineering and Rehabilitation
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：10
• 期：1
• 全文大小：177KB
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• 作者单位：Takehiko Doi (1) (2)
  Soichiro Hirata (3)
  Rei Ono (4)
  Kota Tsutsumimoto (1) (2)
  Shogo Misu (2)
  Hiroshi Ando (2)
  
  1. Section for Health Promotion, Department for Research and Development to Support Independent Life of Elderly, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, 35 Gengo Morioka, Obu, Aichi, 474-8511, Japan
  2. Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Sumaku Tomogaoka, Kobe, Hyogo, Japan
  3. Higashihiroshima Orthopedic Clinic, Higashihiroshima Clinic Building, 4281-1 Saijochomisono, Higashiroshima, Hiroshima, Japan
  4. Department of Community Health Sciences, Kobe University Graduate School of Health Sciences, 7-10-2 Sumaku Tomogaoka, Kobe, Hyogo, Japan
  

文摘

Background Gait variables derived from trunk accelerometry may predict the risk of falls; however, their associations with falls are not fully understood. The purpose of the study was to determine which gait variables derived from upper and lower trunk accelerometry are associated with the incidence of falls, and to compare the discriminative ability of gait variables and physical performance. Methods This study was a 1-year prospective study. Older people (n = 73) walked normally while wearing accelerometers attached to the upper and lower trunk. Participants were classified as fallers (n = 16) or non-fallers (n = 57) based on the incidence of falls over 1 year. The harmonic ratio (HR) of the upper and lower trunk was measured. Physical performance was measured in five chair stands and in the timed up and go test. Results The HR of the upper and lower trunk were consistently lower in fallers than non-fallers (P < 0.05). Upper trunk HR, was independently associated with the incidence of falls (P < 0.05) after adjusting for confounding factors including physical performances. Consequently, upper trunk HR showed high discrimination for the risk of falls (AUC = 0.81). Conclusions HR derived from upper trunk accelerometry may predict the risk of falls, independently of physical performance. The discriminative ability of HR for the risk of falls may have some validity, and further studies are needed to confirm the clinical relevance of trunk HR.