Potential of Kinect-assessed stepping test for assessing fall risk in community-dwelling older women

• Movement pattern assessed during a 20-sec Stepping Test with eyes open may be an indicator of fall risk. • Motion analysis using an infrared depth sensor facilitates movement analysis and is easily employed anywhere. • Logistic analysis revealed an association between falls and total knee movement distance during a 20-sec Stepping Test. Previously, we have shown that movement path distance and displacement during a 20-sec stepping test (ST) discriminates between independent and dependent-living older adults. The present study aims to determine whether movement and displacement characteristics during ST are an indicator of risk of falling in independent-living, community-dwelling older women Independent-living older women recruited for this cross-sectional study were divided into a fall (F: n = 154) or no fall (NF: n = 847) history group. Each participant completed one trial of an eyes open, ST. ST outcome measures included head total movement distance (TMD), maximum movement displacement of the head (MMD), total knee movement distance (KMD), maximum height of the left and right knees (MKH), and step number (STEP) as determined with a KINECT TM infrared depth sensor. Ratio of KMD/TMD was calculated to index upper- body sway relative to the lower-body. Age, height, body mass, and BMI were not different between groups. KMD (F: median: 4.812 m, interquartile range (IQR): 3.720–7.718 m; NF: 5.309 m, 4.266–6.600 m), TMD / KMD (F: 0.145 m, 0.107–0.196 m; NF: 0.127 m, 0.100–0.170 m) and MKH (F: 0.073 m, 0.052–0.106 m, NF: 0.091 m, 0.060–0.135 m) were different between F and NF (Mann-Whitney, P < 0.05). Logistic regression revealed an association between falls and KMD (OR 1.232, 95 % CI 1.108–1.370). Characteristics of ST movement and displacement assessed with Kinect TM provide useful indicators for fall risk assessment among independent-living, community-dwelling older women.