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

Table 4

Univariable analysis of factors linked to incisional SSI^†.

		Incisional SSI (n, %)	No incisional SSI (n, %)	value
Patients (n)		29	297
POA	Yes	19 (66%)	135 (46%)	0.04
	No	10 (34%)	162 (54%)
RBC transfusion	Yes	3 (10%)	33 (11%)	0.90
	No	26 (90%)	264 (89%)
Age	≤65 years	16 (55%)	181 (61%)	0.54
	>65 years	13 (45%)	116 (39%)
Gender	Males	18 (62%)	173 (58%)	0.69
	Females	11 (38%)	124 (42%)
BMI	<25 kg/m^2	23 (79%)	262 (88%)	0.17
	≥25 kg/m^2	6 (21%)	35 (12%)
Location of cancer	Colon	9 (31%)	122 (41%)	0.29
	Rectum	20 (69%)	175 (59%)
ASA classification	ASA-1/2	27 (93%)	282 (95%)	0.67
	ASA-3	2 (7%)	15 (5%)
Hypertension	Yes	8 (28%)	67 (23%)	0.54
	No	21 (72%)	230 (77%)
Diabetes	Yes	2 (7%)	28 (9%)	0.65
	No	27 (93%)	269 (91%)
Cardiac diseases	Yes	2 (7%)	13 (4%)	0.54
	No	28 (93%)	284 (96%)
Respiratory diseases	Yes	0 (0%)	12 (4%)	0.27
	No	29 (100%)	285 (96%)
Renal diseases	Yes	1 (4%)	0 (0%)	0.09
	No	28 (96%)	296 (100%)
Cerebral diseases	Yes	0 (0%)	7 (2%)	1.00
	No	29 (100%)	290 (98%)
Abdominal surgical history	Yes	7 (24%)	47 (16%)	0.25
	No	22 (76%)	250 (84%)
Types of operation	Laparoscopic surgery	15 (52%)	154 (36%)	0.75
	Open surgery	14 (48%)	163 (64%)
Stoma formation	Yes	12 (41%)	24 (8%)	<0.01
	No	17 (59%)	273 (92%)
Surgical resection	Colon resection	8 (28%)	123 (41%)	0.15
	Rectum resection	21 (72%)	174 (59%)
Cancer size(cm)	<4	9 (31%)	113 (38%)	0.46
	≥4	20 (69%)	184 (62%)
T stage	T1/T2	7 (24%)	57 (19%)	0.52
	T3/T4	22 (76%)	240 (81%)
AJCC-TNM stage	I/II	22 (76%)	176 (59%)	0.08
	III/IV	7 (24%)	121 (41%)

^†SSI: surgical site infection.