Assessment of Analgesic Efficacy of Bilateral Lumbar Erector Spinae Plane Block for Postoperative Pain following Lumbar Laminectomy: A Single-Blind, Randomized Clinical Trial

Table 2

Comparison of the use of pain relief medications between the erector spinae plane (ESP) block and control groups.

	ESP block (n = 24)	Control (n = 26)	value
The first request for pain relief in recovery (min)	45 (30–52.5)	22.5 (15–30)	<0.001
PCA morphine used (mg)	3 (2–7)	12.5 (7–16)	<0.001
Additional morphine used in the ward (mg)	0 (0–0)	2 (0–3)	0.007
Morphine used in recovery (mg)	2 (0–4)	7 (6–9)	<0.001
Patients requesting additional morphine in the ward	5 (20.8%)	15 (57.6%)	0.008
Total morphine usage (mg)	4 (3–13)	20 (14–27)	<0.001

Values are shown as median (Q₁–Q₃) or frequency (percentage). The Mann–Whitney U test or chi-squared test was used. ; .