[Purpose] This study aimed to identify kinematic gait indicators for a fall risk
screening test through quantitative comparisons of gait characteristics measured using
mobile inertial sensors between faller and non-faller groups in a population of
community-dwelling older people. [Participants and Methods] We enrolled 50 people aged
≥65 years who used long-term care prevention services, interviewed them to determine their
fall history during the past year, and divided them into faller and non-faller groups.
Gait parameters (velocity, cadence, stride length, foot height, heel strike angle, ankle
joint angle, knee joint angle, and hip joint angle) were assessed using the mobile
inertial sensors. [Results] Gait velocity and left and right heel strike angles were
significantly lower and smaller, respectively, in the faller versus non-faller group.
Receiver operating characteristic curve analysis revealed areas under the curve of 0.686,
0.722, and 0.691 for gait velocity, left heel strike angle, and right heel strike angle,
respectively. [Conclusion] Gait velocity and heel strike angle during gait assessed using
mobile inertial sensors may be important kinematic indicators in a fall risk screening
test to estimate the likelihood of falls among community-dwelling older people.
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