Erector spinae plane block at lower thoracic level for analgesia in lumbar spine surgery: A randomized controlled trial

Table 1 Baseline demographics and characteristics

	ESPB group (n = 30)	Control group (n = 29)	P value
Sex (Male/Female)	13/17	8/21	0.207
Age, yr	61 ± 12	64 ± 10	0.364
Height, cm	165 ± 9	163 ± 8	0.284
Weight, kg	70 ± 9	66 ± 9	0.146
ASA (I/II/III)	11/16/3	6/17/6	0.283
Preoperative resting NRS	4 (3-5)	4 (3-5)	0.871
Preoperative moving NRS	6 (5-7)	5 (4-7)	0.195
Surgery segment
T12	1 (3.3)	2 (6.9)	0.557
L1	2 (6.7)	3 (10.3)	0.643
L2	5 (16.7)	8 (27.6)	0.351
L3	17 (56.7)	24 (82.8)	0.054
L4	27 (90.0)	28 (96.6)	0.643
L5	28 (93.3)	28 (96.6)	1.000
S1	14 (46.7)	13 (44.8)	0.797

Results are presented as the mean ± SD, median (interquartile range), or n (%). ESPB: Erector spinae plane block; NRS: Numerical rating scale; ASA: American Society of Anesthesiologists.