Preoperative albumin levels predict prolonged postoperative ileus in gastrointestinal surgery

Table 3 Association between perioperative albumin and prolonged postoperative ileus by multiple regression analysis in different models

Models	Crude model	P value	Model I	P value	Model II	P value
Preoperative albumin (g/L)	OR (95%CI)		OR (95%CI)		OR (95%CI)
Continuous variable
Per unit	0.95 (0.88, 1.02)	0.174	0.95 (0.88, 1.02)	0.155	0.92 (0.85, 1.00)	0.046
Per SD (3.67)	0.83 (0.63, 1.09)	0.174	0.82 (0.62, 1.08)	0.155	0.73 (0.54, 0.99)	0.046
Categorical variable
< 39.15	Ref.		Ref.		Ref.
≥ 39.15	0.54 (0.32, 0.94)	0.029	0.53 (0.31, 0.92)	0.025	0.43 (0.24, 0.78)	0.006

Crude model covariants were not adjusted; Model I minimally adjusted for sex, age and body mass index (BMI); Model II fully adjusted for sex, age, BMI, type of cancer, surgical technique, tumor stage and use of a postoperative opioid analgesic. PPOI: Prolonged postoperative ileus; OR: Odds ratio; CI: Confidence Interval: SD: Standard error.