TY  - JOUR
PY  - 2015//
TI  - The discriminant value of phase-dependent local dynamic stability of daily life walking in older adult community-dwelling fallers and nonfallers
JO  - BioMed research international
A1  - Ihlen, Espen A. F.
A1  - Weiss, Aner
A1  - Helbostad, Jorunn L.
A1  - Hausdorff, Jeffrey M.
SP  - e402596
EP  - e402596
VL  - 2015
IS  - 
N2  - The present study compares phase-dependent measures of local dynamic stability of daily life walking with 35 conventional gait features in their ability to discriminate between community-dwelling older fallers and nonfallers. The study reanalyzes 3D-acceleration data of 3-day daily life activity from 39 older people who reported less than 2 falls during one year and 31 who reported two or more falls. Phase-dependent local dynamic stability was defined for initial perturbation at 0%, 20%, 40%, 60%, and 80% of the step cycle. A partial least square discriminant analysis (PLS-DA) was used to compare the discriminant abilities of phase-dependent local dynamic stability with the discriminant abilities of 35 conventional gait features. The phase-dependent local dynamic stability λ at 0% and 60% of the step cycle discriminated well between fallers and nonfallers (AUC = 0.83) and was significantly larger (p < 0.01) for the nonfallers. Furthermore, phase-dependent λ discriminated as well between fallers and nonfallers as all other gait features combined. The present result suggests that phase-dependent measures of local dynamic stability of daily life walking might be of importance for further development in early fall risk screening tools.<p />  <p>Language: en</p>
LA  - en
SN  - 2314-6133
UR  - http://dx.doi.org/10.1155/2015/402596
ID  - ref1
ER  -