Table 1 Randomised controlled trials included in systematic review.

From: Length of biliopancreatic limb in Roux-en-Y gastric bypass and its impact on post-operative outcomes in metabolic and obesity surgery—systematic review and meta-analysis

Authors

Year

Setting

Participants (n)

Follow up

Preoperative BMI Short Limb (kg/m2)

Preoperative BMI Long Limb (kg/m2)

Biliopancreatic Limb Length (short) (cm)

Alimentary Limb Length (short) (cm)

Biliopancreatic Limb Length (long) (cm)

Alimentary Limb Length (long) (cm)

Reported outcomes

Brolin et al.

1992

United States

45

12–86 months

63.4 ± 10.0 (48.8 - 94.6).

61.6 ± 9.0 (51.8 – 89.9)

15

75

30

150

Weight loss, BMI change, Complications, Mortality

Inabnet et al.

2005

United States

48

24 months

44.6 ± 3.0

44.9 ± 2.9

50

100

100

150

Weight loss, BMI change, Complications

Pinheiro et al.

2007

Brazil

105

Up to 48 months

53.4 ± NR

54.7 ± NR

50

150

150

250

Weight loss, T2DM improvement, HTN improvement, Dyslipidaemia improvement

Nergaard et al.

2014

Iceland/Norway/Sweden

187

Up to 96 months

43.7 (38–68)

44.5 (39–70)

60

150

200

60

BMI change, T2DM improvement, HTN improvement, Complications

Valezi et al.a

2014

Brazil

120

12 months

46.9 ± 5.69 (100 cm) / 47.64 ± 5.72 (150 cm)

46.81 ± 5.50 (100 cm) / 46.10 ± 5.39 (150 cm)

50

100 / 150a

100

100 / 150a

Weight loss

Homan et al.

2018

Netherlands

146

48 months

45 ± 5

43 ± 5

75

150

150

75

Weight loss, BMI change, T2DM improvement, HTN improvement, Dyslipidaemia improvement, Complications, Mortality

Boerboom et al.

2019

Netherlands

146

48 months

42 ± 4

43 ± 5

75

150

150

75

Weight loss, BMI change, T2DM improvement, HTN improvement, Dyslipidaemia improvement, Complications, Mortality

Ruiz Tovar et al.

2019

Spain

506

5 years

44.2 ± 5.2

44.1 ± 4.1

70

150

120

150

BMI change, T2DM improvement, HTN improvement, Dyslipidaemia improvement,

Miras et al.

2020

United Kingdom

53

12 months

42 ± 6

43 ± 8

50

100

150

100

Weight loss, HTN improvement, Complications

Nergård et al.

2020

Sweden

140

5 years

55.8 ± 6.0

55.6 ± 6.0

60

150

200

Variable (common channel 150 cm)

Weight loss, BMI change, T2DM improvement,

  1. BMI body mass index, HTN hypertension, NR not reported, T2DM type 2 diabetes mellitus.
  2. aIn the study by Valezi et al. there were four study arms comparing both biliopancreatic and alimentary limb lengths.
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