Table 1: Baseline characteristics of T2DM patients with BMI < 35 kg/m2.

AuthorYearProcedure 𝑁 Female/maleMean age (range)Mean followup (range)Mean duration of diabetesInsulin user

1Lee2011MGB, RYGB6238/2443.124 months5.4 years23% ( 𝑛 = 1 4 )
2Boza2011RYGB3017/1348.0 (28–65)24 months ( 𝑛 = 2 0 )4 years3.3% ( 𝑛 = 1 )
3de Sa2011RYGB2750.320 (4–86) months8.8 years22% ( 𝑛 = 6 )
4Huang2011RYGB2220/247.4 (28–63)12 months6.6 years18.2% ( 𝑛 = 4 )
5Scopinaro2011BPD3011/1956.4 (43–69)12 months11.2 years40% ( 𝑛 = 1 2 )
6Shah2010RYGB157/845.69 months8.7 years80% ( 𝑛 = 1 2 )
7Lee2010SG2014/646.312 months>6 months20% ( 𝑛 = 4 )
8DePaula2009II-SG, II-DSG58 (30,28)18/4051.4 (40–66)19.2 (14–28) months9.6 years37.9% ( 𝑛 = 2 2 )
9DePaula2009II-DSG6922/4751.4 (41–63)21.7 (7–42) months11 years44% ( 𝑛 = 3 0 )
10Ramos2009DJB209/1143.0 (29–60)6 months5.3 years0% ( 𝑛 = 0 )
11Ferzli2009DJB743.3 (33–52)12 months10.7 years85.7% ( 𝑛 = 6 )
12Geloneze2009DJB123/950.06 months9 years100% ( 𝑛 = 1 2 )
13Chiellini2009BPD52/348.018 months3–15 years
14Lee2008MGB4438/639.01–5 years
15Scopinaro2007BPD72/549.0 (39–60)13 (10–18) years4.1 years0% ( 𝑛 = 0 )
16Cohen2007DJB20/247.0 (43–51)9 months4.5 years100% ( 𝑛 = 2 )
17Cohen2006RYGB3730/734.0 (28–45)20 (6–48) months0% ( 𝑛 = 0 )
18Noya1998BPD-SPP105/552.1 (40–62)7 (2–18) months40% ( 𝑛 = 4 )

Total477236/20730.1% (129/428)

Weighted mean4722 months8.2 years

RYGB: Roux-en-Y gastric bypass, MGB: mini-gastric bypass, BPD: biliopancreatic diversion, SG: sleeve gastrectomy, II-SG: ileal interposition with sleeve gastrectomy, II-DSG: ileal interposition with diverted sleeve gastrectomy, DJB: duodenal jejunal bypass, BPD-SPP: stomach- and pylorus-preserving BPD.