Robotic and clinical evaluation of upper limb motor performance in patients with Friedreich’s Ataxia: an observational study

Table 3 Correlation between robotic indices and clinical parameters

		SARA (total score)	SARA (upper limb)	GAA smaller	GAA longer	Disease duration
Kinematic indices	Duration of Movement	0.617*	0.659*	0.235	−0.361	−0.109
	Mean Velocity	−0.542	−0.634	−0.417	0.193	0.078
	Peak Velocity	−0.480	−0.541	−0.200	0.207	0.093
Accuracy indices	Length Ratio	0.355	0.363	−0.214	−0.336	−0.208
	Lateral	0.134	0.136	0.077	−0.102	−0.399
	Aiming Angle	0.029	0.160	0.238	0.224	−0.639
Smoothness indices	Normalized Jerk	0.674*	0.739*	0.291	−0.329	−0.118
Smoothness indices	Speed Metric	−0.403	−0.385	−0.060	0.413	−0.100
Submovement indices	Number of Submovements	0.606*	0.708*	0.200	−0.266	−0.191
	Duration of Submovements	0.062	−0.009	0.109	−0.025	−0.051
	Amplitude of Submovements	−0.491	−0.605	−0.305	0.144	0.062

Spearman’s rank correlation coefficient are reported. The symbol * indicates a statistical significance, with p < 0.05 (p values are corrected for multiple comparison, by using a False Discovery Rate procedure).

ISSN: 1743-0003