[Retracted] Application of Ultrasound-Guided Upper Trunk Brachial Plexus Block in Observation of Lower Shoulder Surgery

Table 1

Comparison of general information and BIS value of patients in each group.

Group	Quantity	Age	BMI	Operation time (min)	BIS value of T1	BIS value of T2
A	30	59.90 ± 5.84	23.44 ± 2.47	59.07 ± 12.77	51.40 ± 4.32	51.00 ± 4.38
B	30	58.63 ± 6.70	24.17 ± 3.13	59.90 ± 11.21	50.53 ± 3.78	51.70 ± 2.59
C	30	60.10 ± 6.78	22.99 ± 2.21	55.33 ± 14.11	52.17 ± 4.42	52.37 ± 2.19