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Table 4 Correlation between robotic indices and clinical parameters for patient older than 10 years

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

 

SARA (total score)

SARA (upper limb)

GAA smaller

GAA longer

Disease duration

Kinematics indices

Duration of Movement

0.891**

0.776**

0.117

−0.683

0.106

Mean Velocity

−0.818**

−0.808**

−0.500

0.150

−0.115

Peak Velocity

−0.727*

−0.690*

−0.233

0.117

−0.023

Accuracy indices

Length Ratio

0.564

−0.433

−0.433

−0.600

0.065

Lateral Deviation

0.318

0.242

−0.017

−0.517

−0.185

Aiming Angle

0.200

0.205

0.117

−0.217

−0.411

Smoothness indices

Normalized Jerk

0.964**

0.904**

0.233

−0.517

0.046

Speed Metric

−0.500

0.217

0.217

0.850

−0.259

Submovement indices

Number of Submovements

0.927**

0.872**

0.050

−0.567

0.018

Duration of Submovements

0.770

0.014

0.267

0.067

−0.129

Amplitude of Submovements

−0.773*

−0.772*

−0.400

0.117

−0.148

  1. Spearman’s rank correlation coefficient are reported. The symbol * indicates a statistical significance, with p < 0.05; the symbol ** indicates a statistical significance, with p < 0.01 (p values are corrected for multiple comparison, by using a False Discovery Rate procedure).