Development of Evaluation Methods for Lower Limb Function between Aged and Young Using Principal Component Analysis

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  • Nomoto Yohei
    University of Niigata Prefecture, Faculty of International Studies and Regional Development, Department of International Studies and Regional Development
  • Yamashita Kazuhiko
    Tokyo Healthcare University, Faculty of Health Care, Division of Healthcare Informatics
  • Ohya Tetsuya
    Tokyo Denki University, School of Science and Technoligy For Future Life, Department of Information Systems and Multimedia Design
  • Koyama Hironori
    Tokyo Denki University, School of Science and Technoligy For Future Life, Department of Information Systems and Multimedia Design
  • Kawasumi Masashi
    Tokyo Denki University, School of Science and Technoligy For Future Life, Department of Information Systems and Multimedia Design

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Other Title
  • 主成分分析を用いた高齢者と若年者の下肢機能の評価手法の開発
  • シュセイブン ブンセキ オ モチイタ コウレイシャ ト ジャクネンシャ ノ カシ キノウ ノ ヒョウカ シュホウ ノ カイハツ

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There is the increasing concern of the society to prevent the fall of the aged. The improvement in aged people's the muscular strength of the lower-limb, postural control and walking ability are important for quality of life and fall prevention. The aim of this study was to develop multiple evaluation methods in order to advise for improvement and maintenance of lower limb function between aged and young. The subjects were 16 healthy young volunteers (mean ± S.D: 19.9 ± 0.6 years) and 10 healthy aged volunteers (mean ± S.D: 80.6 ± 6.1 years). Measurement items related to lower limb function were selected from the items which we have ever used. Selected measurement items of function of lower are distance of extroversion of the toe, angle of flexion of the toe, maximum width of step, knee elevation, moving distance of greater trochanter, walking balance, toe-gap force and rotation range of ankle joint. Measurement items summarized by the principal component analysis into lower ability evaluation methods including walking ability and muscle strength of lower limb and flexibility of ankle. The young group demonstrated the factor of 1.6 greater the assessment score of walking ability compared with the aged group. The young group demonstrated the factor of 1.4 greater the assessment score of muscle strength of lower limb compared with the aged group. The young group demonstrated the factor of 1.2 greater the assessment score of flexibility of ankle compared with the aged group. The results suggested that it was possible to assess the lower limb function of aged and young numerically and to advise on their foot function.

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