Reliability, validity and discriminant ability of the instrumental indices provided by a novel planar robotic device for upper limb rehabilitation

Table 4 Test-retest reliability in healthy subjects (n = 19)

	Test mean (SD)	Retest mean (SD)	ICC	95% CI		Paired t test (P)
	Test mean (SD)	Retest mean (SD)	ICC	Lower bound	Upper bound	Paired t test (P)
Duration (s)	107.3 (56.30)	83.96 (50.02)	0.914	0.336	0.977	0.000
Velocity_mean (m/s)	0.08 (0.04)	0.10 (0.06)	0.81	0.437	0.931	0.014
Length_tot (m)	2.64 (0.29)	2.68 (0.21)	0.593	−0.064	0.844	0.484
Lenght₁ (m)	0.39 (0.03)	0.39 (0.03)	0.627	−0.002	0.858	0.966
Lenght₂ (m)	0.46 (0.08)	0.47 (0.09)	0.93	0.822	0.973	0.309
Lenght₃ (m)	0.14 (0.01)	0.14 (0.00)	§	§	§	0.331
Lenght₄ (m)	0.46 (0.10)	0.48 (0.01)	0.01	−1.511	0.615	0.273
Lenght₅ (m)	0.38 (0.06)	0.39 (0.03)	0.087	−1.446	0.652	0.458
Lenght₆ (m)	0.35 (0.07)	0.35 (0.09)	0.722	0.260	0.894	0.870
Lenght₇ (m)	0.09 (0.01)	0.09 (0.00)	§	§	§	0.358
Lenght₈ (m)	0.38 (0.04)	0.38 (0.06)	0.814	0.512	0.929	0.729
Score	9.68 (0.58)	9.78 (0.37)	0.522	−0.249	0.816	0.453
Work_tot (J)	17.62 (10.29)	19.84 (8.21)	0.695	0.227	0.882	0.296
Work_tan (J)	13.17 (7.38)	15.42 (6.61)	0.868	0.632	0.950	0.040

Intraclass Correlation Coefficient (ICC) with 95% Confidence Interval (CI), and result of the t tests. Bold values indicated statistical significance, with p value less than 0.05. The symbol § indicate null variance in the data

ISSN: 1743-0003