Table 2.

Spearman's correlations between clinical and neurophysiological parameters

ParametersLow-beta powerHFO powerRest MIMov.-rel. changes MIMov.-rel. changes HFO powerUPDRS (B&R)
Low-beta power0.722**0.756**−0.110−0.1860.428*
p < 0.001p < 0.001p = 0.626p = 0.384p = 0.029
N = 26N = 22N = 22N = 24N = 26
HFO power0.722**0.752**−0.163−0.3470.498**
p < 0.001p < 0.001p = 0.470p = 0.097p = 0.01
N = 26N = 22N = 22N = 24N = 26
Rest MI0.756**0.752**−0.147−0.0970.493*
p < 0.001p < 0.001p = 0.513p = 0.669p = 0.02
N = 22N = 22N = 22N = 22N = 22
Mov.-rel. changes MI−0.110−0.163−0.147−0.440*0.117
p = 0.626p = 0.470p = 0.513p = 0.041p = 0.604
N = 22N = 22N = 22N = 22N = 22
Mov.-rel. changes HFO power−0.186−0.347−0.097−0.440*−0.493*
p = 0.384p = 0.097p = 0.669p = 0.041p = 0.014
N = 24N = 24N = 22N = 22N = 24
UPDRS (B&R)0.428*0.498**0.493*0.117−0.493*
p = 0.029p = 0.01p = 0.02p = 0.604p = 0.014
N = 26N = 26N = 22N = 22N = 24
  • Significant correlations are highlighted in bold. Low-beta power, Relative power of the low-beta peak at rest; HFO power, relative power of the high-frequency (250–350 Hz) peak at rest; Rest MI, modulation index (cross-frequency coupling) at rest; Mov.-rel. changes MI, relative movement-related changes in the modulation index; Mov.-rel. changes HFO power, relative movement-related changes in HFO power; UPDRS (B&R), sum of the UPDRS-III scores for bradykinesia and rigidity.

  • *p < 0.05,

  • **p < 0.01.