Preoperative albumin levels predict prolonged postoperative ileus in gastrointestinal surgery

Table 2 Univariate analysis of the potential clinicopathologic variables of Prolonged postoperative ileus

Characteristics	Without PPOI	With PPOI	Univariate	P value
	(n = 244)	(n = 67)	OR (95%CI)
Sex				0.362
Female	76 (81.72%)	17 (18.28%)	Ref.
Male	168 (77.06%)	50 (22.97%)	1.33 (0.72, 2.46)
Age (yr)				0.867
< 60	123 (78.58%)	33 (21.15%)	Ref.
≥ 60	121 (78.06%)	34 (21.94%)	1.05 (0.61, 1.80)
Body mass index (kg/m2)				0.886
< 25	136 (78.16%)	38 (21.84%)	Ref.
≥ 25	108 (78.83%)	29 (21.17%)	0.96 (0.56, 1.66)
Previous abdominal surgery				0.803
No	197 (78.17%)	55 (21.83%)	Ref.
Yes	47 (79.66%)	12 (20.34%)	0.91 (0.45, 1.84)
Preoperative albumin (g/L)				0.029
< 39.15	98 (72.59%)	37 (27.41%)	Ref.
≥ 39.15	146 (82.95%)	30 (17.05%)	0.54 (0.32, 0.94)
Preoperative K+ (mmol/L)				0.701
< 3.96	123 (79.35%)	32 (20.65%)	Ref.
≥ 3.96	121 (77.56%)	35 (22.44%)	1.11 (0.65, 1.91)
Type of cancer				0.424
Gastric cancer	130 (80.25%)	32 (19.75%)	Ref.
Colorectal cancer	114 (76.51%)	35 (23.49%)	1.25 (0.73, 2.14)
Surgical technique				0.839
Endoscopic surgery	168 (78.14%)	47 (21.86%)	Ref.
Open surgery	76 (79.17%)	20 (20.83%)	0.94 (0.52, 1.70)
Tumor stage				< 0.001
I-II	118 (88.72%)	15 (11.28%)	Ref.
III-IV	121 (69.94%)	52 (30.06%)	3.33 (1.81, 6.25)
Postoperative opioid analgesic				< 0.001
No	164 (85.86%)	27 (14.14%)	Ref.
Yes	80 (66.67%)	40 (33.33%)	3.04 (1.74, 5.30)

PPOI: Prolonged postoperative ileus; OR: Odds ratio; CI: Confidence Interval.