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Table 6 Parameters of linear regression for different bicoherence estimates in association with graduated levels of anaesthesia.

From: Peak and averaged bicoherence for different EEG patterns during general anaesthesia

(a)
Bifrequency region
Coef (95% conf. interval) z value p-value ρ R2
δ_δ 1.217 (1.105 - 1.33) 21.27 < 0.001 0.462 0.152
δ_θ 0.985 (0.906 - 1.063) 24.61 < 0.001 0.509 0.168
δ_α 0.269 (0.227 - 0.311) 12.66 < 0.001 0.445 0.060
δ_β 0.066 (0.051 - 0.081) 8.67 < 0.001 0.356 0.036
θ_θ 0.403 (0.325 - 0.48) 10.21 < 0.001 0.426 0.044
θ_α 0.19 (0.145 - 0.236) 8.25 < 0.001 0.476 0.024
θ_β 0.007 (-0.01 - 0.024) 0.83 0.408 0.468 0.002
α_α 0.186 (0.115 - 0.258) 5.14 < 0.001 0.439 0.011
α_β -0.002 (-0.024 - 0.019) -0.21 0.831 0.499 0.002
β_β -0.032 (-0.053 - -0.011) -2.95 0.003 0.723 0.004
(b)
Bifrequency region
Coef (95% conf. interval) z value p-value ρ R2
δ_δ 1.883 (1.728 - 2.038) 23.82 < 0.001 0.433 0.184
δ_θ 1.903 (1.758 - 2.048) 25.74 < 0.001 0.472 0.191
δ_α 0.786 (0.674 - 0.898) 13.74 < 0.001 0.396 0.072
δ_β 0.377 (0.304 - 0.449) 10.17 < 0.001 0.195 0.053
θ_θ 1.232 (1.069 - 1.394) 14.82 < 0.001 0.448 0.080
θ_α 0.582 (0.47 - 0.695) 10.18 < 0.001 0.502 0.036
θ_β 0.117 (0.05 - 0.184) 3.44 0.001 0.343 0.005
α_α 0.587 (0.432 - 0.742) 7.44 < 0.001 0.458 0.020
α_β 0.207 (0.128 - 0.287) 5.13 < 0.001 0.391 0.012
β_β -0.059 (-0.133 - 0.015) -1.56 0.119 0.656 0.008
  1. (a) Average and (b) smoothed-peak bicoherence estimates. Linear regression performed using the univariate generalised linear mixed effects model where ρ is the intraclass correlation based on a random intercept model.