Table 2.

Adverse Events in the safety population in the study^a

Characteristics	Treatment group, No. (%)
	ESPB	SAPB	Control	P valueb
No	50	50	50
Hypotension in PACUc	2(4)	2(4)	1(2)	0.81
Reported block complicationsd	0	0		0.99
PONVe	5(10)	4(8)	6(12)	0.80
Dizziness	1(2)	2(4)	3(6)	0.59
No. of patients with ≥ 1 postoperative complications	9(18)	12(24)	7(15)	0.43
Pneumonia	3(6)	7(14)	4(5)	0.36
Recurrent pneumothorax/Air leak requiring additional intervention	5(10)	4(8)	3(6)	0.76
Arrhythmia	1(2)	0(0)	0(0)	0.36
Bleeding necessitating blood transfusion	0(0)	1(2)	1(2)	0.60

Abbreviations: PACU Post-Anesthesia Care Unit, PONV postoperative nausea and vomiting

^a Safety population comprised patients who were randomized and received at least one treatment from the assigned group

^b Chi-square test was employed in analysis

^c Hypotension that necessitates pharmacological intervention is typically defined as follows: a systolic blood pressure below 90 mmHg or a decrease of more than 20% from the patient's baseline blood pressure

^d Complications associated with nerve blocks can include nerve injury, vascular injury, local anesthetic allergy or hypersensitivity reaction, blockade failure or incomplete blockade, local muscle pain, excessive bleeding, hematoma formation, or local infection

^e Postoperative nausea and vomiting is defined as the experience of nausea, vomiting, or both during the first 24 h following surgery