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

Table 3 Postoperative variables

	ESPB group (n = 30)	Control group (n = 29)	P value
Duration to the first PCIA bolus, h	8.0 (4.5-17.0)	1 (0.5-6)	0.000
Resting NRS 24 h post operation	1 (1-2)	2 (1-3)	0.084
Coughing NRS 24 h post operation	3 (2-4)	3 (2-5)	0.075
Resting NRS 48 h post operation	1 (0-1)	1 (1-2)	0.012
Coughing NRS 48 h post operation	2 (1-2)	3 (2-4)	0.002
Morphine consumption 24 h post operation, mg	18 (14-24)	18 (14-28)	0.339
Morphine consumption 48 h post operation, mg	36 (28-45)	36 (33-55)	0.120
Time to first ambulation, hour	95 (72-96)	96 (76-114)	0.024
Resting NRS on postoperative 30th d	1 (0-1)	2 (1-2)	0.001

Results are presented as the median (interquartile range). ESPB: Erector spinae plane block; NRS: Numerical rating scale.