Table 4.

Estimated intraoperative blood loss and transfusion rate for laparoscopic and open rectal cancer resection

Ref.	EBL (mL)			Blood transfusion rate
	Lap	Open	P value	Lap	Open	P value
Liang et al[17]	N/A	N/A	N/A	2.4%	4.6%	0.38
Kang et al[18]	200	217.5	0.006	0%	0.005%	P > 0.99
Lujan et al[20]	127.8	234.2	P < 0.001	N/A	N/A	N/A
Ng et al[22]	321.7	555.6	P = 0.09	N/A	N/A	N/A
Braga et al[24]	150	350	P < 0.001	7.2%	26.8%	P = 0.002
Zhou et al[30]	20	92	P = 0.05	N/A	N/A	N/A

EBL: Estimated blood loss; N/A: Not applicable.