title: Concept Software Based on Kinect for Assessing Dual-Task Ability of Elderly People.
abstract: OBJECTIVE
  Assessment of fall risk of elderly people is a critical issue. Dual-task (DT) ability is a criterion for risk assessment. We developed new concept software based on Microsoft (Redmond, WA) Kinect™ for assessing DT ability. The software is named "Dual-Task Tai Chi" (DTTC) and includes Tai Chi and number place (Sudoku) components. The purpose of this study is to validate the DTTC test for assessment of DT ability.
  
  
  METHODS
  Forty-five community-dwelling elderly (mean age, 74.1±6.6 years) individuals participated in this study. They performed DTTC, locomotive, cognitive, and DT tests. DT ability was evaluated with a 10-m walk under a cognitive-task condition and a 10-m walk under a manual-task condition. The correlation between the time taken to complete the DTTC test and each function test was determined using Pearson correlation coefficients. Stepwise multiple regression analysis was conducted to assess the relationship between the DTTC test results and results of the other tests.
  
  
  RESULTS
  The time taken to complete the DTTC test was correlated with DT ability, locomotive functioning, and cognitive functioning. Results of stepwise multiple regression analysis confirmed that DT, balance, and cognitive ability are statistically significant. No statistically significant association was found for the other variables.
  
  
  CONCLUSIONS
  The DTTC test quantitatively evaluates a compound function including DT, balance, and cognitive abilities.
authors.affiliation: 1 Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University , Kyoto, Japan .
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kayama
authors.affiliation: 2 Division of Medical Information Technology and Administration Planning, Kyoto University Hospital , Kyoto, Japan .
authors.forename: Kazuya
authors.initials: K
authors.lastname: Okamoto
authors.affiliation: 1 Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University , Kyoto, Japan .
authors.forename: Shu
authors.initials: S
authors.lastname: Nishiguchi
authors.affiliation: 3 Faculty of Health Science, Department of Physical Therapy, Kyoto Tachibana University , Kyoto, Japan .
authors.forename: Koutatsu
authors.initials: K
authors.lastname: Nagai
authors.affiliation: 1 Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University , Kyoto, Japan .
authors.forename: Minoru
authors.initials: M
authors.lastname: Yamada
authors.affiliation: 1 Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University , Kyoto, Japan .
authors.forename: Tomoki
authors.initials: T
authors.lastname: Aoyama