Effect of ultrasound-guided lumbar square muscle block on stress response in patients undergoing radical gastric cancer surgery

Table 2 Comparison of perioperative indicators between the observation and the control groups (X ± s)

Group	n	Sufentanil dosage (μg)	Post-operative awakening time (min)	Postoperative time in bed (h)	Time taken for anal discharge (h)
Observation group	50	25.56 ± 4.56	14.52 ± 1.72	21.26 ± 3.41	12.26 ± 1.65
Control group	50	71.12 ± 7.45	25.62 ± 2.51	30.23 ± 4.56	20.17 ± 2.36
t value	28.380	20.533	8.861	15.458	0.000
P value	0.000	0.000	0.000