Impact of Preoperative Anemia on Perioperative Outcomes in Patients Undergoing Elective Colorectal Surgery

Table 2

Intraoperative variables.

	Anemia group ()	Nonanemia group ()	value
Operative time	140 (120–180)	138 (115–180)	0.90
Estimated blood loss	100 (80–150)	100 (50–150)	0.41
Perioperative RBC transfusion, n (%)	40 (25.9%)	3 (1.7%)	<0.01
Units of RBC transfusion	3 (2–6)	4 (2–4)	<0.01
Types of operation, n (%)			<0.01
Laparoscopic surgery^†	60 (39%)	109 (63%)
Open surgery	94 (61%)	63 (37%)
Surgical procedure, n (%)			<0.01
Colon resection	93 (60%)	38 (22%)
Rectum resection	61 (40%)	135 (78%)
Stoma formation, n (%)	36 (23%)	51 (30%)	0.20
Maximum diameter of cancer (cm)			0.02
<4 cm	47 (31%)	75 (44%)
≥4 cm	107 (69%)	97 (56%)
T stage, n (%)			0.25
T1	4 (3%)	6 (4%)
T2	19 (12%)	35 (20%)
T3	98 (64%)	98 (57%)
T4	33 (21%)	33 (19%)
Number of nodal harvest	9 (6–12)	7 (4–11)	<0.01
Patients with nodal metastasis, n (%)	52 (34%)	70 (41%)	0.31
TNM stage, n (%)			0.58
I/II	96 (62%)	102 (59%)
III/IV	58 (38%)	70 (41%)

^†Included laparoscopy-assisted and hand-assisted laparoscopic colorectal resection for colorectal cancer (CRC).