Table 2.

Outcome variables in randomized controlled trials

Author (published year)		Pain Score, Mean ± SD (numbers)						side effect control number/total numberTAP block number/total number
		2 h		6 h		24 h
		control	TAP	control	TAP	control	TAP
Walter Catherine J (2013)	at rest	3.5 ± 2.2 (32)	4 ± 3.1 (31)	3.6 ± 2.6 (31)	2.9 ± 2.8 (30)	2.8 ± 2.3 (33)	3.0 ± 2.3 (33)	nausea or vomiting placebo: 1/34 TAP block: 9/33
	on movement	4.6 ± 2.5 (32)	4.4 ± 3.0 (31)	4.1 ± 2.9 (31)	3.7 ± 2.8 (30)	3.6 ± 2.7 (33)	3.7 ± 2.4 (33)	NR
Sinha A (2013)	at rest and on movement	1.3 ± 1.5 (50)	1.5 ± 1.8 (50)	0.5 ± 0.6 (50)	1.3 ± 1.5 (50)	0.5 ± 0.6 (50)	0.5 ± 0.6 (50)	required BIPAP support control group control: 4/31 TAP: 0/31
Parikh BK (2013)	at rest	2.4 ± 1.5 (31)	1.0 ± 0.7 (31)	3.2 ± 1.09 (31)	1.8 ± 1.05 (31)	2.3 ± 0.8 (31)	1.9 ± 0.8 (31)	NR
	on movement	4.03 ± 1.6 (31)	2.1 ± 0.6 (31)	4.7 ± 1.4 (31)	3.2 ± 1.4 (31)	3.8 ± 1.1 (31)	3.43 ± 0.9 (31)
Albrecht E (2013)	at rest and on movement			4.4 ± 0.8 (31)	4.8 ± 0.7 (31)	3.5 ± 0.8 (31)	4.1 ± 0.7 (31)	nausea or vomiting control: 4/30 TAP: 8/27
Petersen PL (2012)	at rest	3.7 ± 1.9 (37)	3.1 ± 1.8 (37)	2.1 ± 1.4 (37)	1.9 ± 1.5 (37)	1.6 ± 1.6 (37)	1.5 ± 1.2 (37)	nausea or vomiting control: 13/37 TAP: 8/37
	on movement	5.1 ± 2.4 (37)	2.9 ± 2.0 (37)	3.5 ± 1.9 (37)	2.6 ± 1.9 (37)	2.5 ± 2.0 (37)	2.4 ± 1.6 (37)	NR
Ortiz J (2012)	at rest and on movement	2.17 ± 0.35 (35)	3.0 ± 0.43 (39)	3.53 ± 0.47 (35)	3.05 ± 0.53 (39)	NR	NR	nausea control: 13/35 TAP: 17/39
Kane SM (2012)	at rest and on movement	2.4 ± 6.6 (28)	3.0 ± 2.6 (28)	NR	NR	3.0 ± 2.6 (28)	2.4 ± 2.1 (28)	NR
Hosgood SA (2012)	NR	NR	NR	NR	NR	NR	NR	Nausea and vomiting control: 9/22 TAP: 10/24
Ra Yoon Suk (2010)	at rest and on movement	6.9 ± 1.57 (18)	2.6 ± 1.46 (18)	6.1 ± 1.98 (18)	1.9v1.43 (18)	4.4 ± 1.68 (18)	1.3 ± 0.97 (18)	NR

TAP, transversus abdominal block; NR, no reported.