Table 2.

Quantitative motor assessment—response-to-intervention analyses in PD vs. controls.

iWalk: Stride length PD (n = 18) vs. Controls (n = 17)
p-value time	p-value time × group	p-value time × gait condition	p-value time × group × gait condition
iWalk: normal pace vs. iWalk: dual-tasking (calculating + crossing)
0.09	0.040	0.07	0.36
iWalk: normal pace vs. iWalk: dual-tasking—calculating vs. iWalk: dual-tasking—crossing
0.008	0.009	0.014	0.023ϕ‡*

iWALK, instrumented walk; n, number; p, level of significance; PD, Parkinson's Disease. time: change from baseline to follow-up; group: PD vs. Controls; gait condition: normal pace vs. dual-tasking calculating vs. dual-tasking crosses ^ϕnormal pace vs. dual-tasking calculating: p = 0.036;

^‡normal pace vs. dual-tasking crosses: p = 0.64;

^*dual-tasking calculating vs. dual-tasking crosses: p = 0.018. Bold values represent significant values.