Fig. 2. Prediction probability (PK) for the comparison of the investigated states. Results are shown for awake versus steady state anesthesia, steady state anesthesia versus first reaction, and steady state anesthesia versus extubation. A three-dimensional scatter plot is presented with data for mean arterial blood pressure (MAP; light gray square ); heart rate (HR; light gray triangle ); Narcotrend® (filled square ); Bispectral Index® (BIS®; filled triangle ); spectral edge frequency (SEF; open square ); median frequency (MF; open triangle ); and relative (%) power in δ (dark gray square ), θ (dark gray triangle ), α (dark gray circle ), and β (dark gray diamond ). A PKvalue of 1.0 means that the parameter predicts the states correctly 100% of the time. A PKof 0.5 means that the parameter predicts not better than a 50:50 chance.