Comorbitidies: diabetes
Study	Outcome	Surgery	No surgery	P value
Dixon 2008	Remission of type 2 diabetes at 2‐years	22/30 (73%)	4/30 (13%)	RR 5.5 (95% CI 2.2 to 14.0); P < 0.001
Dixon 2008	No diabetes medication at baseline	2/29 (6.9%)	4/26 (15.4%)
Dixon 2008	No diabetes medication at baseline at 2 years	26/29 (89.7%)	8/26 (30.8%)
Dixon 2008
Ikramuddin 2013	% with fasting glucose <100 mg/dl at 12 months, n (%)	25 (44)	7 (14)	OR 5.8 (95% CI 2.1 to 15.9)
Ikramuddin 2013	% with HbA1c < 6.0% at 12 months, n (%)	25 (44)	5 (9)	OR 7.9 (95% CI 2.7 to 23.4)
Ikramuddin 2013	% with HbA1c < 7.0% at 12 months, n (%)	43 (75)	18 (32)	OR 6.0 (95% CI 2.6 to 13.9)
Ikramuddin 2013
Liang 2013	Diabetes remission at 12 months: LRYGB v no surgery	28/31 (90%)	0/36 (0%)
Liang 2013	Diabetes remission at 12 months: LRYGB v no surgery + exenatide	28/31 (90%)	0/34 (0%)
Liang 2013
Liang 2013
Mingrone 2012	Diabetes remission at 2 years, n/N (%)	15/20 (75%)	0/18 (0%)	P < 0.001
Mingrone 2012
Mingrone 2012
Mingrone 2012
Schauer 2012	Glycosylated haemoglobin ≤6% at 12 months, n (%): LRYGB	21 (42)	5 (12)	P = 0.002
Schauer 2012	Glycosylated haemoglobin ≤6% at 12 months, n (%): LSG	18 (37)	5 (12)	P = 0.008
Schauer 2012	n (%) of patients taking no diabetes medications: LRYGB	38 (78)	0	P < 0.05
Schauer 2012	n (%) of patients taking no diabetes medications: LSG	25 (51)	0	p < 0.05