Table 1.

Overview of preoperative low calorie diets

Year	Investigator	Study type	Patients (n)	Duration (weeks)	Calories (kcal/day)	BMI (% change)	Methods		Change in liver volume (%)	Change in liver volume per week (%)
							Liver or left lobe	Imaging technique
2007	Benjaminov	Prospective	14	4	1520 ± 285	−5.1	Liver	CT	−8.2	−2.1
2006	Colles	Prospective	32	12	456–680	−10.6	Liver	MRI / CT	−18.7	−1.6
2011	Collins	Retrospective	30	9	800	−12.5	Liver	CT	−18	−2.0
2011	Edholm	Prospective	15	4	800–1100	−6.1	Liver	MRI	−12	−3.0
2004	Fris	Prospective	40	2	456	−4.2	Left lobe	Ultrasound	−5.1	−2.6
2013	Gonzalez-Perez	Prospective	20	6	800	−12.2	Liver	CT	−20.3	−3.4
2006	Lewis	Prospective	18	6	450–800	−9.1	Liver	MRI	−14.7	−2.5