Test–retest reliability for performance-based outcome measures among individuals with arthrogryposis multiplex congenita

Table 2 Between-Days, Test–Retest Reliability Results

Outcome Measure	1^st Testing Session Mean ± SD	2^nd Testing Session Mean ± SD	ICC (95%CI)	SEM	MDC₉₀	MDC₉₅
10mWT, m/sec (n = 38)	1.02 ± 0.20	1.01 ± 0.21	.95 (.90, .97)	0.05	0.11	0.13
F8WT, sec (n = 37)^×	7.77 ± 2.27	7.51 ± 2.01	.96 (.92, .98)	0.43	0.99	1.19
F8WT, steps (n = 37)	13.9 ± 3.1	13.7 ± 2.7	.91 (.82, .95)	0.87	2.02	2.42
360TT, sec (n = 38)	2.80 ± 1.03	2.84 ± 0.99	.97 (.93, .98)	0.17	0.41	0.48
360TT, steps (n = 38)	6.2 ± 1.4	6.2 ± 1.6	.85 (.70, .92)	0.60	1.39	1.66
mFSST-average, sec (n = 32)^β	11.81 ± 5.21	10.52 ± 4.25	.94 (.80, .98)	1.16	2.70	3.23
mFSST-best, sec (n = 38)	12.01 ± 4.75	10.90 ± 4.15	.87 (.71, .94)	1.61	3.73	4.46

^xn = 1 missing trial during 1^st testing session
^βn = 8 missing trials among 6 participants
Abbreviations: ICC Intraclass Correlation Coefficient, CI Confidence Interval, SEM Standard Error of Measurement, MDC Minimal Detectable Change, 10mWT 10-m Walk Test, F8WT Figure-of-8 Walk Test, 360TT 360-degree Turn Test, mFSST modified Four Square Step Test, m meters, sec seconds

ISSN: 1471-2474