From: Comparative study of the efficacy of ultrasound-guided erector spinae block and oblique subcostal transversus abdominis plane block for postoperative analgesia after laparoscopic cholecystectomy
Group O
Group E
P value
Age in years (mean ± SD)
44 ±12.1
44± 10.1
0.96
M/F
10/20
13/17
0.43
BMI in kg/m2 (mean ± SD)
23.9±3.1
24.3±2.8
0.63
ASA grade I/II/III
3/22/5
2/24/4
0.92