Abstract
BackgroundThe Timed Up and Go (TUG) test may be a useful tool to detect not only mobility impairment but also possible cognitive impairment. In this cross-sectional study, we used the TUG test to investigate the associations between trajectory-based spatial parameters measured by laser range sensor (LRS) and cognitive impairment in community-dwelling older adults.MethodsThe participants were 63 community-dwelling older adults (mean age, 73.0 ± 6.3 years). The trajectory-based spatial parameters during the TUG test were measured using an LRS. In each forward and backward phase, we calculated the minimum distance from the marker, the maximum distance from the x-axis (center line), the length of the trajectories, and the area of region surrounded by the trajectory of the center of gravity and the x-axis (center line). We measured mild cognitive impairment using the Mini-Mental State Examination score (26/27 was the cut-off score for defining mild cognitive impairment).ResultsCompared with participants with normal cognitive function, those with mild cognitive impairment exhibited the following trajectory-based spatial parameters: short minimum distance from the marker (p = 0.044), narrow area of center of gravity in the forward phase (p = 0.012), and a large forward/whole phase ratio of the area of the center of gravity (p = 0.026) during the TUG test. In multivariate logistic regression analyses, a short minimum distance from the marker (odds ratio [OR]: 0.82, 95% confidence interval [CI]: 0.69–0.98), narrow area of the center of gravity in the forward phase (OR: 0.01, 95% CI: 0.00–0.36), and large forward/whole phase ratio of the area of the center of gravity (OR: 0.94, 95% CI: 0.88–0.99) were independently associated with mild cognitive impairment.ConclusionsIn conclusion, our results indicate that some of the trajectory-based spatial parameters measured by LRS during the TUG test were independently associated with cognitive impairment in older adults. In particular, older adults with cognitive impairment exhibit shorter minimum distances from the marker and asymmetrical trajectories during the TUG test.
Highlights
The Timed Up and Go (TUG) test may be a useful tool to detect mobility impairment and possible cognitive impairment
While there were no significant differences in age, sex, body mass index (BMI), years of education, walking speed, handgrip strength, and TUG time, a significant difference in Mini-Mental State Examination (MMSE) score was observed
The results of this study show that some of trajectorybased spatial parameters measured by laser range sensor (LRS) during the TUG test were independently associated with cognitive impairment in older adults
Summary
The Timed Up and Go (TUG) test may be a useful tool to detect mobility impairment and possible cognitive impairment. In this cross-sectional study, we used the TUG test to investigate the associations between trajectory-based spatial parameters measured by laser range sensor (LRS) and cognitive impairment in community-dwelling older adults. Dementia, including AD, is associated with mortality [4], evidential treatment strategies in daily living have not been detected. TUG requires no special equipment or training and is included as part of a routine examination of physical function for older adults. The TUG test may be a useful tool to detect mobility impairment and possible cognitive impairment
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