Table 4.

Descriptive statistics for instrumented standing balance results including ICCs and 95% confidence intervals

	Healthy controls					Persons with multiple sclerosis
	Day 1 Mean (StD)	Day 2 Mean (StD)	ICC	95% CI bounds		Day 1 Mean (StD)	Day 2 Mean (StD)	ICC	95% CI bounds
			ρ	Lower	Upper			ρ	Lower	Upper
Jerk	0.096 (0.042)	0.084 (0.045)	0.880	0.642	0.960	0.105 (0.065)	0.126 (0.110)	0.858	0.578	0.952
Distance	0.058 (0.021)	0.055 (0.014)	0.788	0.368	0.929	0.067 (0.022)	0.070 (0.034)	0.919	0.759	0.973
Area	0.003 (0.001)	0.003 (0.001)	0.832	0.500	0.944	0.004 (0.002)	0.004 (0.004)	0.891	0.675	0.963
RMS	0.071 (0.025)	0.065 (0.017)	0.790	0.375	0.929	0.078 (0.024)	0.083 (0.039)	0.895	0.687	0.965
Path length	4.893 (0.953)	4.769 (1.255)	0.895	0.687	0.965	5.516 (1.631)	5.543 (1.936)	0.884	0.655	0.961
Range	0.369 (0.101)	0.345 (0.104)	0.731	0.200	0.910	0.384 (0.103)	0.407 (0.192)	0.809	0.430	0.936
Mean velocity	0.140 (0.063)	0.143 (0.056)	0.699	0.105	0.899	0.152 (0.085)	0.164 (0.075)	0.807	0.426	0.935
Mean frequency	0.497 (0.150)	0.466 (0.108)	0.795	0.389	0.931	0.461 (0.130)	0.440 (0.121)	0.900	0.703	0.967
95% frequency	1.735 (0.474)	1.718 (0.302)	0.672	0.024	0.890	1.630 (0.316)	1.538 (0.375)	0.853	0.561	0.951
Frequency dispersion	0.783 (0.036)	0.781 (0.037)	0.151	−1.528	0.715	0.748 (0.040)	0.753 (0.039)	0.438	−0.675	0.811

ICC values in boldface show at least “good” reliability (ICC > 0.60)