Table 2.

P-values and effect sizes from statistical comparisons of rigidity measurements between the ON- and OFF-DBS conditions

Rigidity measurement	Comparison	p-value	Effect size (r)
Corrected mUPDRS score	OFF versus DBS	0.04	0.18
Angular impulse score	OFF versus DBS	$4.3\times {10}^{-4}$	0.30
Work score	OFF versus DBS	$2.8\times {10}^{-4}$	0.31
Viscosity	OFF versus DBS	$4.0\times {10}^{-4}$	0.35
Stiffness	OFF versus DBS	$1.8\times {10}^{-3}$	0.37