Table 1 The Pearson’s correlation coefficient (r) between ARI and other cerebral autoregulation parameters.

From: Assessment of cerebral autoregulation indices – a modelling perspective

 

No Noise

Low Noise

Middle Noise

High Noise

Mx

r = −0.95, p < 0.001

r = −0.93, p < 0.001

r = −0.87, p < 0.001

r = −0.71, p < 0.001

Gain_VLF

r = −0.98, p < 0.001

r = −0.98, p < 0.001

r = −0.94, p < 0.001

r = −0.45, p < 0.001

Gain_LF

r = −0.22, p < 0.001

r = −0.23, p < 0.001

r = −0.20, p < 0.001

p = 0.49

Phase_VLF

r = 0.99, p < 0.001

r = 0.98, p < 0.001

r = 0.95, p < 0.001

r = 0.81, p < 0.001

Phase_LF

r = 0.93, p < 0.001

r = 0.92, p < 0.001

r = 0.88, p < 0.001

r = 0.71, p < 0.001

Coh_VLF

r = −0.86, p < 0.001

r = −0.87, p < 0.001

r = −0.90, p < 0.001

r = −0.44, p < 0.001

Coh_LF

p = 0.73

r = −0.42, p < 0.001

r = −0.36, p < 0.001

r = −0.11, p=0.04

  1. ARI: autoregulation index. TF: transfer function; Mx: mean flow index using arterial blood pressure as input; VLF: very low frequency, 0.02~ 0.07 Hz; LF: low frequency, 0.07~ 0.2 Hz. Black: TF parameters in very low frequency; p value for all the parameters in this form is below 0.01. Gain_VLF, Phase_VLF, Coh_VLF refers to gain, phase and squared coherence in VLF range; Gain_LF, Phase_LF, Coh_LF refers to gain, phase and squared coherence in LF range. P < 0.05 was considered to be significant.