. Author manuscript; available in PMC: 2018 Jul 1.

Published in final edited form as: Exp Brain Res. 2017 Apr 28;235(7):2243–2258. doi: 10.1007/s00221-017-4971-y

Table 3. Results of the correlation analysis.

Group	V_ORT vs. \|dCOP/dt\|		nME vs. \|dCOP/dt\|		V_UCM vs. COP(t)		ME vs. COP(t)
Group	Median	Q₁, Q₃	Median	Q₁, Q₃	Median	Q₁, Q₃	Median	Q₁, Q₃
PD patients	0.11	0.04; 0.26	0.07	0.03; 0.20	0.17	0.13; 0.21	0.11	0.05; 0.19
Controls	0.37	0.24; 0.42	0.31	0.24; 0.47	0.26	0.05; 0.39	0.10	0.08; 0.18
PD off-drug	0.08	0.02; 0.16	0.07	0.04; 0.29	0.27	0.10; 0.38	0.09	0.02; 0.36
PD on-drug	0.06	0.02; 0.09	0.07	0.05; 0.11	0.18	0.04; 0.26	0.14	0.07; 0.24

The median and inter-quartile values of the correlation coefficients between the V_ORT (nME) indices and the derivative of the COP_AP (t), and between the V_UCM (ME) indices and COP_AP(t). Q₁: the first quartile, Q₃: the third quartile