Table 2.

Improvement or Remission of Type 2 Diabetes After Bariatric Surgery: Study Characteristics and Laboratory Data

Source	Study Type	No. of Patients With Diabetes at Baseline	Follow- up, y	Diabetes Diagnostic Criteria	Mean (SD) [95% CI]
					Baseline HbA1c, %	Follow-up HbA1c, %	Baseline FBG or FPG, mg/dL	Follow-up FBG or FPG, mg/dL
Roux-en-Y Gastric Bypass
Mingrone et al,11 2012	RCT	20	2	History of diabetes for ≥5 y with HbA1c ≥7%	8.6 (1.4) [8.0–9.2]	6.4 (1.8) [5.6–7.2]	172.0 (60.3) [145.6–198.4]	114.7 (13) [108.7–120.7]
Adams et al,6 2012	Matched cohort	88	5	FBG ≥126 mg/dL, HbA1c ≥6.5%, or medication	NR	NR	NR	NR
Courcoulas et al,7,2013	Prospective cohort	320	3	FBG ≥126 mg/dL, HbA1c ≥6.5%, or medication	NR	NR	NR	NR
Laparoscopic Adjustable Gastric Band
Caiazzo et al,10 2010	Prospective cohort	23	5	ADA criteria; FBG >126 mg/dL ×2 and/or medication	8.3 (1.6) [7.7–9.0]	6.6 (0.9) [6.2–7.0]0	173.0 (54.1) [150.9–195.1]0	118.9 (19.8) [110.8–127.0]0
Phillips et al,8 2009	Prospective cohort	31	3	Documented diabetes and elevated HbA1c at baseline	8.0 (1.3) [7.5–8.5]0	6.7 (1.0) [6.4–7.0]0	NR	NR
Courcoulas et al,7 2013	Prospective cohort	98	3	FBG ≥126 mg/dL, HbA1c ≥6.5%, or medication	NR	NR	NR	NR
Sultan et al,12 2010	Case series	95	4	ADA 2003 criteria	7.5	6.6	146	118.5

Abbreviations: ADA, American Diabetes Association; FBG, fasting blood glucose; FPG, fasting plasma glucose; HbA_1c, glycated hemoglobin; NR, not reported; RCT, randomized clinical trial.

SI conversion factor: To convert glucose to mmol/L, multiply by 0.0555.