Albumin as a predictor in a nomogram for severe complications following gastrointestinal surgery and how to manage it

Table 2 Stratified multivariable logistic regression analysis of preoperative albumin on severe complications

Characteristics	Univariable logistic regression		Multivariable logistic regression
	OR (95%CI)	P value	OR (95%CI)	P value
Age (years)	1.003 (1.014-1.053)	0.001	1.019 (0.997-1.041)	0.091
Sex
Male	Reference		-
Female	1.074 (0.718-1.607)	0.729	-
American Society of Anesthesiologists grade
Low	Reference		Reference
High	2.608 (1.669-4.075)	< 0.001	1.715 (1.010-2.912)	0.046
Operation
Laparoscopy	Reference		Reference
Laparotomy	1.695 (1.141-2.519)	0.009	1.356 (0.863-2.130)	0.187
Surgical duration (minutes)	1.005 (1.003-1.007)	< 0.001	1.005 (1.003-1.008)	< 0.001
Preoperative total bilirubin (μmol/L)	1.012 (0.987-1.038)	0.341	-
Preoperative alanine aminotransferase (U/L)	1.001 (0.990-1.012)	0.893	-
Preoperative aspartate aminotransferase (U/L)	1.012 (0.995-1.029)	0.182	-
Preoperative gamma-glutamyl transferase (U/L)	1.002 (0.998-1.005)	0.355	-
Preoperative albumin (g/L)
(30, 35)	3.302 (1.701-5.405)	< 0.001	2.223 (1.192-4.415)	0.012
(35, 40)	1.234 (0.732-2.079)	0.430	1.021 (0.589-1.770)	0.942
(40, 45)	Reference		Reference

OR: Odds ratio.