Signal Persistence of Bispectral Index and State Entropy during Surgical Procedure under Sedation

Table 2

Comparison of SE and BIS parameters during EC and non-EC periods.

	EC period	Non-EC period	𝑃
SE	77 (46–89)	80 (45–89)	0.09
BIS	70 (47–83)	75 (42–86)	<0.0001*
EMG (dB)	41±9	42±9	0.09
SQI < 50 (%)	40.7%	12.3%	<0.0001*
SQI (Mean ± SD)	59±30	78±24	<0.0001*

EC: electrocautery, SE: state entropy, BIS: bispectral Index, EMG: electromyogram, SQI: signal quality index. SE and BIS are expressed as median (10% quartile–90% quartile). Comparisons for SE, BIS, EMG, and SQI between EC and non-EC periods were made using Mann-Whitney test. Comparison for SQI<50 between EC and non-EC periods was made using chi-square test with Yates correction.