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Mobility performance tests for discriminating high risk of frailty in community-dwelling older women

Mi-Ji Kim, Noriko Yabushita, Maeng-Kyu Kim, Miyuki Nemoto, Satoshi Seino, Kiyoji Tanaka
Archives of Gerontology and Geriatrics 2010, 51 (2): 192-8
19939477
We aimed to compare and identify high and low risk of frailty in community-dwelling older women by using five mobility performance tests. The participants were 166 older women at high risk and 171 age-matched controls at low risk of frailty according to the long-term care insurance (LTCI) system (age: 65-90 years). The mobility performance tests included 5-chair sit-to-stand (STS), alternate step, timed up-and-go (TUG), timed rapid gait (TRG), and usual gait speed (UGS). Data analysis showed that high-risk individuals (81.9%) were more likely to be pre-frail than low-risk individuals (55.0%) by Fried's frailty phenotype. The four mobility performance tests, except the 5-chair STS, had the largest areas under the curve (AUC) for discriminating older women at high and low risk (AUC>0.80, p<0.001). The optimal cutpoint (6 s) for the TRG test had the highest sensitivity (78%) and specificity (83%) in identifying high risk of frailty. Our results suggest that walking ability tests are clinically useful in screening older individuals at high risk of frailty. In particular, the TRG test is more likely than other tests to discriminate older women at high risk of frailty based on the LTCI system.

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