Efficacy of bi-level erector spinae plane block versus bi-level thoracic paravertebral block for postoperative analgesia in modified radical mastectomy: a prospective randomized comparative study

Table 2 Clinical outcomes of the studied groups

Variables	Group TPVB	Group ESPB	P-value
NRS on awakening			0.808
Median (IQR)	0.85 (1.47)	0 (2)	0.808
NRS at 2 h			< 0.001
Median (IQR)	1.7 (1.5)	2 (2)	< 0.001
NRS at 6 h			0.012
Median (IQR)	1.46 (1.3)	2 (2)	0.012
NRS at 12 h			0.089
Median (IQR)	0.56 (0.8)	0 (1)	0.089
NRS at 24 h			0.429
Median (IQR)	0.12 (0.3)	0 (0)	0.429
NRS at 36 h			1.0
Median (IQR)	0 (0)	0 (0)	1.0
Rescue dose on awaking [N (%)]	2 (4.88)	0 (0)	0.152
Rescue dose at 2 h [N (%)]	5 (12.2)	6 (14.6)	0.745
Rescue dose at 6 h [N (%)]	4 (9.76)	4 (9.76)	1.00
Rescue dose at 12 h [N (%)]	2 (4.88)	0 (0)	0.152
Rescue dose at 24 h [N (%)]	1 (2.44)	0 (0)	0.314
Rescue dose at 36 h [N (%)]	1 (2.44)	0 (0)	0.314
Intraoperative Fentanyl [N (%)]	13 (31.7)	19 (46.3)	0.174
PONV [N (%)]	2 (4.88)	0 (0)	0.157
Hypotension [N (%)]	0 (0)	2 (4.88)	0.152
Chronic pain [N (%)]	0 (0)	0 (0)	1.0
Length of stays			1.0
Mean (s.d.)	2.4 (± 0,5)	2.3 (± 0,6)	1.0

Rescue dose, Intraoperative Fentanyl, PONV, Hypotension, Chronic pain and length of stay were tested by Chi Square test
NRS was tested by U di Mann–Whitney test
S.d. standard deviation, IQR interquartile range, N number of patients, NRS Numeric rating scale, PONV post operative nausea and vomiting

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