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. 2021 May 21;31(8):3822–3832. doi: 10.1007/s11695-021-05388-9

Table 1.

Study characteristics

Author and year Country Study design Number of subjects (female gender) Age of subjects1 Surgical procedure Follow-up (years)

Courtney et al. 2018

[26]

UK Retrospective cohort

1011

(762)

47 (18–78) Laparoscopic, multiple bariatric techniques2 2

Mancini et al. 2018

[27]

France Retrospective cohort

238

(195)

40 (34–48)

Laparoscopic RYGB (64.7%)

SG (35.3%)

2

Jambhekar et al. 2018

[28]

USA Prospective cohort

713

(622)

41.7 ± 11.2 Laparoscopic SG 2

Keith et al. 2018

[29]

USA Retrospective cohort

586

(461)

43 (36–51) Laparoscopic RYGB 9

Hanvold et al. 2015

[30]

Norway Randomized lifestyle inter-vention study

165

(123)

44 ± 8.6 Laparoscopic RYGB 2

Reid et al. 2018

[31]

Canada Prospective cohort

48

(36)

50.7 ± 9.4 Laparoscopic RYGB3 10

Velcu et al. 2005

[32]

USA Retrospective cohort

41

(36)

32.4 ± 3.6 Open RYGB 5

Diaz- Guerra et al. 2005

[33]

Spain Prospective cohort

75

(53)

39 Open BPD of Larrad 5

Abbreviations BMI Body Mass Index, BPD biliopancreatic diversion, RYGB Roux-en-Y gastric bypass, SG Sleeve Gastrectomy, UK United Kingdom, USA United States of America

1Expressed in mean with standard deviation or mean with range

2Included RYGB, SG, one-anastomosis gastric bypass and gastric banding

3Majority of patients were done laparoscopically (±75%)