EEG Signals Analysis Using Multiscale Entropy for Depth of Anesthesia Monitoring during Surgery through Artificial Neural Networks

Table 1

Different combinations of multiple scales changing from 1 to 20 via ANN for monitoring DOA using BIS as gold standard. 1-1 in the first column represents the input data of ANN model that is the entropy at time scale 1, and 1–20 indicates that there are multiple scales from 1 to 20 and so on.

Scale(s)	Before filtering			After filtering
		Corrcoef	CV (%)		Corrcoef	CV (%)
1-1	0.44	0.40 ± 0.21	52.50	0.53	0.51 ± 0.23	45.10
1-2	0.47	0.50 ± 0.27	54.00	0.68	0.70 ± 0.19	27.14
1–3	0.67	0.68 ± 0.19	27.94	0.69	0.70 ± 0.18	25.71
1–4	0.69	0.70 ± 0.14	20.00	0.72	0.72 ± 0.15	20.83
1–5	0.69	0.70 ± 0.14	20.00	0.72	0.72 ± 0.15	20.83
1–6	0.71	0.71 ± 0.14	19.72	0.73	0.73 ± 0.15	20.55
1–7	0.71	0.71 ± 0.14	19.72	0.73	0.73 ± 0.14	19.18
1–8	0.71	0.71 ± 0.14	19.72	0.74	0.73 ± 0.14	19.18
1–9	0.72	0.72 ± 0.14	19.44	0.75	0.74 ± 0.14	18.92
1–10	0.71	0.71 ± 0.16	22.54	0.75	0.74 ± 0.14	18.92
1–11	0.72	0.72 ± 0.14	19.44	0.76	0.75 ± 0.13	17.33
1–12	0.75	0.74 ± 0.12	16.22	0.76	0.75 ± 0.14	18.67
1–13	0.73	0.73 ± 0.14	19.18	0.76	0.75 ± 0.13	17.33
1–14	0.76	0.74 ± 0.12	16.22	0.76	0.75 ± 0.13	17.33
1–15	0.75	0.74 ± 0.13	17.57	0.76	0.74 ± 0.14	18.92
1–16	0.75	0.74 ± 0.13	17.57	0.76	0.75 ± 0.13	17.33
1–17	0.76	0.74 ± 0.13	17.57	0.77	0.75 ± 0.13	17.33
1–18	0.76	0.74 ± 0.13	17.57	0.75	0.75 ± 0.14	18.67
1–19	0.76	0.74 ± 0.13	17.57	0.76	0.75 ± 0.12	16.00
1–20	0.76	0.75 ± 0.12	16.00	0.76	0.75 ± 0.15	20.00
2–20	0.74	0.73 ± 0.13	17.81	0.73	0.72 ± 0.13	18.06
Mean ± std	0.70 ± 0.09	0.70 ± 0.09	22.30 ± 10.61	0.73 ± 0.05	0.73 ± 0.05	20.63 ± 6.21