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Fig. 1 | BioMedical Engineering OnLine

Fig. 1

From: Automatic sleep stage classification based on subcutaneous EEG in patients with epilepsy

Fig. 1

Box plot of Cohen’s kappa values. The midline in the boxes represent the medians, and the dots represent the means. Red crosses are outliers. The mean value ± standard deviation of the mean for the five-class problem: \(\kappa _{PS.}=0.78 \pm 0.02\), \(\kappa _{LONO}=0.74 \pm 0.02\) and \(\kappa _{expert}=0.66 \pm 0.04\). Mean value ± standard deviation of the mean for the two-class problem: \(\kappa _{PS.}=0.85 \pm 0.03\), \(\kappa _{LONO}=0.82 \pm 0.03\) and \(\kappa _{expert}=0.81 \pm 0.04\). The horizontal lines represent intervals of the level of agreement as interpreted by McHugh et al. [18]

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