Effect of the stimulation on walking parameters.

PW (absence of stimulation); 110A (presence of stimulation). Values: Mean, (±sd), median, [range]. Units: (m/s) = meters/second; (m) = meter; (steps/s) = steps/second; (s) = seconds. Results for velocity, step length, cadence and turning time are shown pooled across groups because ANOVA showed lack of significant interaction cue*group, meaning all groups were affected in the same way. Log transformations were applied to Turning Time in order to make distributions adjusted to normality so that making parametric analysis applicable, its mean and (±sd) are plotted without transformation to make interpretation feasible. The stimulation led to increased velocity and cadence, and also to reduce the time to turn, which was seen in the three groups.
Variables related to freezing are only related to PD+FOG, median and range are shown as variables were not matching normality. Stimulation led both to reduce the number and the mean duration of the freezing episodes.