Table 5.

Results of the linear mixed-effect model for the QUIET sleep (QS) state in the ENTIRE data set.

Feature	BSBP	BGA	BPMA	MSE	R2	${\text{R}}_{\text{Red}}^2$	FLLR	Δ(%)
Asym(θ)	0.051†	0.002§	−0.023*	0.005	0.62	0.56	12.72†	5.85
CI(C3)	−2.223†	−0.182§	1.077*	9.739	0.62	0.59	11.68†	5.39
P(HF)	0.003†	0.00015§	0.0003†	0.00002	0.13	0.01	22.41†	10.1
Asym(δ)	0.048†	0.004§	−0.021*	0.005	0.55	0.491	1.02†	5.09
Asym(α)	0.056†	0.006‡	−0.022*	0.006	0.56	0.45	9.65†	4.47
CI(Fp2)	−1.759†	−0.211‡	1.05*	7.93	0.65	0.63	8.78‡	4.08
CI(O1)	−2.137†	−0.176§	1.041*	8.828	0.63	0.59	10.53†	4.87
CI(O2)	−1.705‡	−0.143§	1.031*	7.468	0.67	0.61	9.03‡	4.19
CI(Fp1)	−1.628‡	−0.256‡	1.058*	8.096	0.65	0.63	7.03‡	3.28
CI(T3)	−1.771‡	−0.099§	1.027*	6.186	0.73	0.64	9.23‡	4.28
Asym(β)	0.047‡	0.005§	−0.02*	0.005	0.53	0.41	7.29‡	3.4
CI(T4)	−1.626‡	−0.133§	1.017*	6.83	0.72	0.6	6.33‡	2.95

Only the features that have a significant association with early skin-breaking procedure are reported. The values B represent the fixed-effect coefficients for the SBP, GA, and PMA variables with the associated significance level (P-value). For each feature, the following parameters are reported: the mean-absolute error (MSE), the coefficient of determination R², the coefficient of determination of the model with only GA and PMA (${\text{R}}_{\text{Red}}^2$), the log-likelihood ratio (LLR) F-statistics, the decrease of error variance Δ(%) with SBPs variable, and the two-way ANOVA P-value associated with the SBP main effect. The P-value is indicated with following symbols: * for P-value ≤ 0.0001, † for P ≤ 0.01, ‡for P ≤ 0.05, and § for not significant P-values. CI stands for complexity index, P(HF) stands for HF power in the tachogram, and asymmetry is the asymmetry of rEEG in the different frequency bands.

ANOVA, analysis of variance; SBP, skin-breaking procedures.