Table 3.

Cronbach’s alpha, intraclass correlation (ICC), and minimal detectable change values (presented at 90% and 80% confidence levels) for the gait and cognitive variables of interest under single-task and dual-task conditions.

Variable	Cronbach’s alpha	ICC (95% CI)	Minimal Detectable Change: 90% confidence level	Minimal Detectable Change: 80% confidence level
Gait performance without cognitive task completion (single-task)
Average gait speed (m/s)	0.94	0.94 (0.83, 0.98)	0.12	0.09
Cadence (steps/min)	0.31	0.56 (0.12, 0.84)	22.5	17.5
Step length (m)	0.87	0.88 (0.65, 0.96)	0.08	0.06
Step time (s)	0.09	0.10 (0.00, 0.68)	0.16	0.12
Gait performance with cognitive task completion (dual-task)
Average gait speed (m/s)	0.94	0.94 (0.83, 0.98)	0.13	0.10
Cadence (steps/min)	0.74	0.70 (0.18, 0.89)	14.9	11.5
Step length (m)	0.87	0.87 (0.65, 0.95)	0.07	0.06
Step time (s)	0.66	0.61 (0.02, 0.86)	0.11	0.09
Cognitive performance while standing (single-task)
Response time (ms)	0.52	0.59 (0.00, 0.85)	307.5	238.9
Response rate (responses/min)	0.78	0.78 (0.40, 0.92)	4.32	3.36
Response accuracy (% correct)	0.68	0.70 (0.07, 0.90)	23.5%	18.2%
Cognitive performance during gait (dual-task)
Response time (ms)	0.87	0.85 (0.57, 0.95)	108.6	84.4
Response rate (responses/min)	0.67	0.68 (0.09, 0.89)	6.64	5.16
Response accuracy (% correct)	0.88	0.88 (0.67, 0.96)	14.4%	11.2%