Table 1.

Study characteristics.

Author, Year	Study type	Period of randomization	Country	Patient initial BMI	follow-up
Cheng 2022	RCT	03/2014–12/2020	Singapore	27–32 kg/m	5 years
Mingrone 2021	RCT	04/2009–10/2011	Italy	≥ 35	10 years
Schauer 2017	RCT	03/2007–01/2011	USA	27–43	5 years
Crawford 2018	RCT	Period not disclosed	USA	27–43	5 years
Mingrone 2015	RCT	04/2009–10/2009	Italy	≥ 35	5 years
O'Brien 2013	RCT	06/2000–11/2000	Australia	30–35	10 years