title: Generating linear regression model to predict motor functions by use of laser range finder during TUG.
abstract: OBJECTIVE
  The purpose of this study was to investigate which spatial and temporal parameters of the Timed Up and Go (TUG) test are associated with motor function in elderly individuals.
  
  
  METHODS
  This study included 99 community-dwelling women aged 72.9 ± 6.3 years. Step length, step width, single support time, variability of the aforementioned parameters, gait velocity, cadence, reaction time from starting signal to first step, and minimum distance between the foot and a marker placed to 3 in front of the chair were measured using our analysis system. The 10-m walk test, five times sit-to-stand (FTSTS) test, and one-leg standing (OLS) test were used to assess motor function. Stepwise multivariate linear regression analysis was used to determine which TUG test parameters were associated with each motor function test. Finally, we calculated a predictive model for each motor function test using each regression coefficient.
  
  
  RESULTS
  In stepwise linear regression analysis, step length and cadence were significantly associated with the 10-m walk test, FTSTS and OLS test. Reaction time was associated with the FTSTS test, and step width was associated with the OLS test. Each predictive model showed a strong correlation with the 10-m walk test and OLS test (P < 0.01), which was not significant higher correlation than TUG test time.
  
  
  CONCLUSIONS
  We showed which TUG test parameters were associated with each motor function test. Moreover, the TUG test time regarded as the lower extremity function and mobility has strong predictive ability in each motor function test.
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan. Electronic address: d.adachi06@gmail.com.
authors.forename: Daiki
authors.initials: D
authors.lastname: Adachi
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Shu
authors.initials: S
authors.lastname: Nishiguchi
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Fukutani
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Hotta
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Yuto
authors.initials: Y
authors.lastname: Tashiro
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Saori
authors.initials: S
authors.lastname: Morino
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Hidehiko
authors.initials: H
authors.lastname: Shirooka
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Yuma
authors.initials: Y
authors.lastname: Nozaki
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Hinako
authors.initials: H
authors.lastname: Hirata
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Moe
authors.initials: M
authors.lastname: Yamaguchi
authors.affiliation: School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, Japan.
authors.forename: Ayanori
authors.initials: A
authors.lastname: Yorozu
authors.affiliation: School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Takahashi
authors.affiliation: Department of Physical Therapy, Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Aoyama
mesh_terms: D000058:Accidental Falls / Q000706:statistics & numerical data*; D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D005500:Follow-Up Studies; D005684:Gait / Q000502:physiology*; D015577:Geriatric Assessment / Q000379:methods*; D006801:Humans; D007834:Lasers; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D012044:Regression Analysis; D012189:Retrospective Studies; D018570:Risk Assessment