Table 4.

Reliability and Reliable Change Index for Each Outcome Measure Across the 3 Testing Sessions

Variable	Intraclass Correlation Coefficient (3,1)	95% Confidence Interval	P Value	Reliability Rating	Reliable Change Index
Single-task tandem gait time	0.86	0.73, 0.93	<.001	High	5.3 s
Quiet-stance cognitive test correct answers	0.91	0.83, 0.96	<.001	High	12.3 responses
Quiet-stance cognitive test total responses	0.90	0.80, 0.95	<.001	High	12.8 responses
Quiet-stance cognitive test accuracy	0.88	0.77, 0.94	<.001	High	6% correct
Dual-task tandem gait time	0.84	0.69, 0.92	<.001	High	8.5 s
Tandem gait cognitive test correct answers	0.86	0.73, 0.94	<.001	High	6.6 responses
Tandem gait cognitive test total responses	0.82	0.64, 0.91	<.001	High	7.4 responses
Tandem gait cognitive test accuracy	0.26	0.00, 0.66	.19	Poor	18% correct