Isometric hand grip strength measured by the Nintendo Wii Balance Board – a reliable new method

Table 1 Results from the reproducibility analysis for the dominant hand

Dominant hand	Session 1		Session 2
Measurement(s)	MEAN	SD	MEAN	SD	M-Diff (paired T-test)	ICC [95 % CI]	SEM (SEM%)	LOA (LOA%)
First measurement	21.74	1.19	21.94	1.29	0.20 (n.s.)	0.955 [.906-.979]	0.4 (1.9)	3.8 (17.6)
Mean of the two first measurements	21.54	1.19	21.70	1.27	0.16 (n.s.)	0.970 [.937-.986]	0.3 (1.3)	3.1 (14.3)
Mean of all three measurements	21.37	1.18	21.60	1.23	0.23 (n.s.)	0.966 [.927-.985]	0.3 (1.4)	3.1 (14.6)
Highest value of all three measurements	22.33	1.19	22.81	1.34	0.48 (n.s.)	0.960 [.905-.982]	0.4 (1.6)	3.4 (15.4)

Mean, standard deviation (SD), standard error of measurement (SEM) and limits of agreement (LOA) in kilograms. M-diff is the mean difference in kilograms between the mean of the two sessions and the comparison using the paired T-test. n.s. not significant (all p-values are less than 0.001). SEM and LOA are also given in percentages (SEM% and LOA%). Intraclass correlation coefficient (ICC) with 95 % confidence intervals [95 % CI] are given. Results are given for one measurement, mean of two measurements, mean of three measurements and highest value of three measurements

ISSN: 1471-2474