RETRACTED ARTICLE: Preoperative versus postoperative ultrasound-guided rectus sheath block for improving pain, sleep quality and cytokine levels in patients with open midline incisions undergoing transabdominal gynecological surgery: a randomized-controlled trial

Table 3 BIS data of patients in the two groups on the first postoperative night

BIS data	Group PRE	Group POST	95% Confidence interval	P
BIS data	(n = 30)	(n = 31)	95% Confidence interval	P
BIS-AUC (%)	82.5 [81.8, 84.7]	86.5 [86.4.7, 86.9] ^a		< 0.001
Stage N2 sleep (min)	134.0 ± 10.7	81.1 ± 10.6^b	(42.9,62.9)	< 0.001
Stage N3 sleep (min)	54.5 ± 12.4	25.4 ± 7.9^b	(19.2,39.2)	< 0.001

Values represent the median [25th percentile, 75th percentile] and the mean ± SD
BIS bispectral index, SEI sleep efficiency index, AUC, area under the curve
^aMann–Whitney U test
^bStudent’s t test

ISSN: 1471-2253