Comparative study between ultrasound-guided erector spinae plane block and thoracic paravertebral block for postoperative analgesia after video-assisted thoracic surgery: an equivalence study

Ain-Shams Journal of Anesthesiology

Table 4 Comparison between groups as regards VAS at rest and during cough

VAS is at rest	TPVB group (n = 40)			ESPB group (n = 40)			z	P value
VAS is at rest	Range	Median	IQR	Range	Median	IQR	z	P value
PACU	12–23	17	15–20	12–23	17	15–19	0.97	0.33
1 h	14–23	18	16–19	14–24	18	17–20	1.1	0.29
2 h	17–28	22	20–24	16–27	21	19–23	1.2	0.21
4 h	21–32	26	24–29	20–33	25	23–28	0.88	0.38
6 h	18–34	24	22–27	18–34	24	22–27	0.15	0.88
12 h	22–40	30	26–33	19–41	30	26–33	0.03	0.97
18 h	20–34	26	24–29	19–33	25	24–28	0.69	0.49
24 h	19–39	29	26–32	19–41	29	26–32	0.04	0.97
36 h	19–36	27	24–30	19–35	25	24–28	1.5	0.15
48 h	17–38	25	23–29	18–37	27	24–30	1.1	0.27
VAS during cough
PACU	14–26	20	18–23	14–27	20	17–22	0.55	0.58
1 h	16–26	21	19–22	16–27	21	20–23	1.1	0.26
2 h	1930	25	23–27	19–30	24	22–26	0.8	0.41
4 h	23–35	28	26–30	22–36	28	26–31	0.17	0.86
6 h	21–38	28	26–31	21–39	29	26–31	0.1	0.92
12 h	23–44	32	29–36	21–45	33	28–37	0.05	0.96
18 h	22–37	29	26–32	21–36	28	26–30	0.6	0.55
24 h	22–44	32	29–36	22–46	33	29–36	0.08	0.94
36 h	21–40	30	27–34	21–39	28	27–31	1.57	0.11
48 h	19–43	28	26–32	20–41	30	27–34	1.1	0.28

Data presented as the median and interquartile range (IQR); Z Mann–Whitney test, TPVB Thoracic paravertebral block, ESPB Erector spinae plane block, PACU Post-anesthesia care unit