Characteristics for gait parameters of community-dwelling elderly Japanese with lower cognitive function

Objectives Recent studies reported that several gait parameters were associated with lower cognitive function or cognitive decline, however, known gait parameters were limited and no study has used large-scale data. We identified the characteristics for gait parameters of community-dwelling elderly Japanese with lower cognitive function. Methods 1,240 community-dwelling adults (mean [SD] age, 77.2 [4.8] years; women, 59.4%) aged 70 or older participated in geriatric health assessments in 2016. We measured comprehensive gait parameters using resistive pressure platform. Cognition was assessed by Mini-Mental State Examination (MMSE). Results There are possible correlations between gait measures (gait speed, stride length, step length, step width, average foot pressure, double support duration, and single support duration) and CVs (CV of stride length, step length, average foot pressure, and single support duration) with MMSE score, respectively. After adjustment for important confounders, multiple regression models showed that gait speed (beta = .080, p = 0.006), stride length (beta = .123, p<0.001), step length (beta = .123, p<0.001), average foot pressure (beta = .060, p = 0.040), double support duration (beta = -.082, p = 0.004), single support duration (beta = .086, p = 0.003), CV of stride length (beta = -.091, p<0.001), CV of step length (beta = -.090, p<0.001), and CV of single support duration (beta = -.058, p = 0.037) had significant association with MMSE score, respectively. Conclusions Our findings suggest that person with lower cognitive function tend to have unsteady gait such as erratic length and time of one step, in addition to decreasing the vertical displacement of the center of gravity and slower speed.