New data is provided on scaling relations between: i) fault length and the length of related fractures; ii) mean step length and width for overstepping fault segments; iii) angular values at the intersection of the fault plane and related fractures.
The exceptions were step width (SEM 10% of between day mean), left foot rotation angle (SEM 14% of between– and within day mean) and right foot rotation angle (SEM 11% of between– and within day mean).
Proprietary software was subsequently used to calculate mean spatiotemporal gait parameters (Table 1), including cadence, step and stride length, step width, foot rotation, stance and stride times and swing phase and single and double support durations.
The SEM, when expressed as a percentage of the mean, was typically less than 10% for all gait parameters, except foot rotation angle and step width.
Spearman's correlations between pairs of markers were computed for each trimester and additionally, on the basis of de-trended residuals, by subtracting the ordinary least squares fitted mean from all observations, and then averaging over a four-week moving window with a step width of one week.
Subjects became accustomed to walk on target footprints in less than 10 min, with mean (± SD) precision of 0.020 ± 0.002 m in stride length, 0.022 ± 0.006 m in step width, and 2.7 ± 0.6° in progression angle.
Additionally we calculated means and standard deviation for the continuous gait variables velocity, cadence, time, duration, stride length, and step width stratified by history of falls, frailty, multimorbidity and disability status, as well as multiple medications, sex and age groups.
The spatial configuration of the sequence of stepping targets can be manipulated, requiring gait adjustments in terms of step length, step width and step-length symmetry.
Independent variables included variability of step length, step width, and step time.
The primary independent variables were the variability of step length, step width, and step time.
