Fast-track protocols in laparoscopic liver surgery: Applicability and correlation with difficulty scoring systems

Table 2 Multivariate models

Model
Iwate
Discharge 24 h		Sig	OR	Discharge 72 h	Sig	OR
Iwate		0.001	1.626 (1.2-2.18)	Iwate	0.01	1.46 (1.09-1.95)
				BMI 25-30	0.033	6.39 (1.16-35.30)
				BMI 30-35	0.013	8.51 (1.57-46.14)
Complications		Sig	OR	Readmissions	Sig	OR
Iwate		0.02	1.2 (1.03-1.41)	Iwate	0.007	1.58 (1.13-2.22)
BMI > 35		0.008	8.75 (1.76-43.44)
Southampton
Southampton	0.015		1.43 (1.07-1.92)
				BMI 25-30	0.032	6.08 (1.16-31.87)
				BMI 30-35	0.006	9.85 (1.91-50.70)
Complications	Sig		OR	Readmissions	Sig	OR
				Southampton	0.036	1.3 (1.01-1.68)
BMI > 35	0.013		7.09 (1.52-33.04)
Gayet
Discharge 24 h	Sig		OR	Discharge 72 h	Sig	OR
Gayet	0.004		1.85 (1.21-2.81)	Gayet	0.043	1.53 (1.01-2.31)
				BMI 25-30	0.042	5.72 (1.06-30.86)
				BMI 30-35	0.014	8.08 (1.52-42.99)
Complications	Sig		OR	Readmissions	Sig	OR
Gayet	0.008		1.48 (1.11-1.98)	Gayet	0.027	2.08 (1.08-4.01)
BMI > 35	0.009		8.56 (1.71-42.85)

Considering the end-point of discharge in < 24 h and < 72 h, complication rate and readmissions, complexity scores were included and analyzed independently. Age, body mass index, sex, American Society of Anesthesiologists score, previous surgery, malignancy, bilobar spread and liver disease were added as variables. BMI was an independent risk factor added to complexity scores in most of the models analyzed. BMI: Body mass index; OR: Odds ratio; Sig: Significance.