Analgesic efficacy of postoperative bilateral, ultrasound-guided, posterior transversus abdominis plane block for laparoscopic colorectal cancer surgery: a randomized, prospective, controlled study

Table 2 Comparison of clinical outcomes between the groups

	Group TAP (n = 40)	Group Control (n = 42)	P value
Tramadol consumption within 24 h after surgery (mg) ^a	0 (0, 87.5)	100 (100, 200)	< 0.001
Time to first requirement of rescue tramadol muscular injection (min)^a	1440(285,1440.00)	50(30, 90)	< 0.001
time to flatus (h)	32.4 ± 6.2	39.0 ± 8.7	< 0.001
time to mobilization (h)	27.9 ± 7.8	33.9 ± 8.2	0.001
length of hospital stay (d)	3.4 ± 0.5	4.0 ± 0.6	< 0.001

Note: Data are presented as mean ± SD, unless otherwise indicated. ^aData are presented as median and quartiles, and analyzed by Mann-Whitney U test. Group TAP = transversus abdominis plane block

ISSN: 1471-2253