Table 1 Comparison of general information between the two groups (\(\overline{x} \pm s\), case).

From: Opioid-free anesthesia with ultrasound-guided quadratus lumborum block in the supine position for lower abdominal or pelvic surgery: a randomized controlled trial

Project/group

Q group (n = 62)

C group (n = 60)

t/χ2

P

Gender (male/female)

30/32

36/24

1.656

0.198

Age (age)

51.90 ± 16.54

55.27 ± 13.15

−1.243

0.216

BMI (kg/mm)

23.45 ± 3.67

22.89 ± 3.78

0.830

0.408

Department

 Gynecology

16

15

0.011

0.916

 General surgery

20

17

0.075

0.783

 Urology

26

28

0.118

0.731

Pelvic surgery/Lower abdominal surgery

29/33

26/34

0.146

0.703

Type of operation

(Laparoscopic/open)

40/22

41/19

0.199

0.655

Preoperative complications

 Hypertension

10

4

1.012

0.315

 Diabetes

6

5

0.003

0.955

 Cardiac disease

5

5

0.076

0.783

 Other

16

11

0.602

0.438

 No

25

35

3.270

0.071