Relationship between characteristics of plantar pressure distribution while standing and falls in community-dwelling elderly

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Abstract

【Objectives】 : The purpose of this study was to clarify the characteristics of plantar pressure distribution while the community-dwelling elderly were standing, and to investigate the relationship between plantar pressure distribution and falls. 【Methods】 : Subjects comprised 87 community-dwelling elderly individuals (14 men, 73 women ; mean age, 75.0 ± 6.4 years) who were independent in activities of daily living. Data were obtained over time using a plantar pressure measuring system. The foot arch area was divided into 5 sections (divided into forefoot, midfoot, and heel) and the toe area was divided into 5 sections (each toe). Plantar pressure was then quantitatively calculated in center of foot pressure (CFP) position of 45%FL (relative distance from the heel with respect to foot length), 50%FL, 55%FL amd 60%FL. CFP position was based on the findings of preceding studies. CFP position of 45%FL was the highly stable quiet stance position. And CFP position of 60%FL was the forward limit of a quiet stance. Load values for the 10 areas are shown as relative values (%) with respect to the full load on the plantar portion of one foot. The loads on the 10 parts of each foot were calculated based on the CFP position, and similarities and differences between them were examined to identify any variation in the toe pressure. So toe pressur of 45%FL and 60 %FL was classified. 【Results】 : 1. Plantar pressure distribution was classified into 3 pattern. Group 1 : toe pressure was lower than the mean value of the toe puressures at 45%FL and higher than the mean value of the toe puressures at 60%FL. Group 2 : toe pressure was higher than the mean value of the toe puressures at 45%FL and higher than the mean value of the toe puressures at 60%FL. Group 3 : toe pressure was lower than the mean value of the toe puressures at 45%FL and lower than the mean value of the toe puressures at 60%FL. 2. It related to the 3 pattern of plantar pressure distribution and walking time, the history of falls. And there were a lot of occurrences of the falls in Group 3. The highest relativ risk of falls was Group 3 (RR : 4.0). 【Conclusion】 : To prevent falls in the elderly, we focused on stability in standing posture and quantitatively investigated plantar pressure distribution. Characteristics of toe pressure showed 3 patterns related to falls. This suggests that plantar pressure distribution in a standing posture may be one indicator for predicting falls may be effective in preventing falls. 【目的】:地域高齢者の立位姿勢における足底圧分布の特徴を明らかにした。さらに、転倒 との関係を検討した。【方法】:日常生活の自立した地域高齢者87名(750. ±64. 歳)を対象 として、足底圧計測システムに経年的に蓄積された安静立位から前傾に至るデータを取得 した。足弓部を5分割(前足3分割、中足、踵)、足指部を5分割(足指毎)し、足圧中心 (CFP)が踵から足長に対して45%の位置(以下45%FL)、50%FL、55%FL、60%FLの足底 圧を算出した。CFP位置は、45%FLは平均安静立位位置であり、60%FLまでは成人の立位 姿勢の前方向の安定域とされていることから選択した。各部位の足底圧は、一側の全足底 圧に対する相対値(%)で示した。個々のデータ間を比較し、足指圧の変動の相違が特徴 的であったことから、CFP位置45% FLと60% FLにおける足指圧の平均値を基準として足 底圧分布を類型化した。さらに、転倒との関連を検討した。【結果】:足底圧に左右差およ び経年的な変化はみられなかった。足底圧分布は、CFP位置45%FLの足指圧が低値であり、 60%FLは高値であるⅠ群、2地点とも高値であるⅡ群、2地点とも低値であるⅢ群に分類 された。3群とも、前傾に伴い足指圧も増加していた。足弓部の圧は、前足と中足は変化 なく、踵は減少していた。3群と転倒要因である歩行速度および転倒経験に関連がみられ た。また、測定後1年間の転倒発生はⅢ群に多く、相対危険比は40. であった。【結論】:高 齢者の転倒予防のために立位姿勢の安定性に注目して足底圧分布を量的に検討した。足指 圧の特徴から3パターンを見出し、転倒との関連がみられたことから、立位姿勢における 足底圧分布は転倒予測指標の1つとなる可能性が示唆された。[原著]

Journal

  • 金沢大学つるま保健学会誌 = Journal of the Tsuruma Health Science Society Kanazawa University

    金沢大学つるま保健学会誌 = Journal of the Tsuruma Health Science Society Kanazawa University 34(2), 51-63, 2011-01-04

    金沢大学つるま保健学会 = the Tsuruma Health Science Society, Kanazawa University

Codes

  • NII Article ID (NAID)
    120002723539
  • NII NACSIS-CAT ID (NCID)
    AA11599711
  • Text Lang
    ENG
  • Article Type
    departmental bulletin paper
  • ISSN
    1346-8502
  • Data Source
    IR 
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