Table 4.

Test-retest reliability scores of the smartphone-based 2-Minute Walking Test based on the comparison of the mean value of the first 5 test scores with the mean value of the second 5 test scores for persons with multiple sclerosis and the healthy control participants in the matched group.

Group	ICCa (A,1; 95% CI)	Cronbach α		Cohen d	SEM (m)	Smallest detectable change (m)
Persons with multiple sclerosis	0.956 (0.898-0.981)	.977	0.028		9.0	25.1
Healthy control–matched	0.750 (0.381-0.915)	.859	0.220		14.7	40.7

^aICC: intraclass correlation coefficient.