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Cochrane Database of Systematic Reviews

Pancreatoduodenectomía (Whipple clásica) versus pancreatoduodenectomía conservadora del píloro (Whipple pp) para el tratamiento quirúrgico del carcinoma periampular y pancreático

Information

DOI:
https://doi.org/10.1002/14651858.CD006053.pub6Copy DOI
Database:
  1. Cochrane Database of Systematic Reviews
Version published:
  1. 16 February 2016see what's new
Type:
  1. Intervention
Stage:
  1. Review
Cochrane Editorial Group:
  1. Cochrane Gut Group

Copyright:
  1. Copyright © 2016 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

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Authors

  • Felix J Hüttner

    Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany

  • Christina Fitzmaurice

    Hematology‐Oncology, University of Washington/Fred Hutchinson Cancer Research Center, Seattle, USA

  • Guido Schwarzer

    Center for Medical Biometry and Medical Informatics, Medical Center ‐ University of Freiburg, Freiburg, Germany

  • Christoph M Seiler

    Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany

  • Gerd Antes

    Cochrane Germany, Medical Center ‐ University of Freiburg, Freiburg, Germany

  • Markus W Büchler

    Correspondence to: Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany

    [email protected]

  • Markus K Diener

    Department of General, Visceral and Transplant Surgery, University of Heidelberg, Heidelberg, Germany

Contributions of authors

MKD:

  • Designing the review.

  • Collecting data for the review.

  • Undertaking searches.

  • Screening search results.

  • Organising retrieval of papers.

  • Screening retrieved papers against inclusion criteria.

  • Appraising quality of papers.

  • Extracting data from papers.

  • Writing to authors of papers to ask for additional information.

  • Providing additional data about papers.

  • Obtaining and screening data on unpublished studies.

  • Managing data for the review.

  • Entering data into RevMan 2014.

  • Analysing data.

  • Interpreting data.

  • Providing a methodological perspective.

  • Providing a clinical perspective.

  • Providing a consumer perspective.

  • Writing the review.

  • Performing previous work that served as the foundation of the current study.

CF:

  • Collecting data for the review.

  • Designing search strategies.

  • Undertaking searches.

  • Screening search results.

  • Organising retrieval of papers.

  • Screening retrieved papers against inclusion criteria.

  • Appraising quality of papers.

  • Extracting data from papers.

  • Writing to authors of papers to ask for additional information.

  • Providing additional data about papers.

  • Obtaining and screening data on unpublished studies.

  • Managing data for the review.

  • Entering data into RevMan 2014.

  • Analysing data.

  • Interpreting data.

  • Writing the review.

  • Revising the review after peer review.

GS:

  • Extracting data from papers.

  • Analysing data.

  • Interpreting data.

CMS:

  • Providing a methodological perspective.

  • Providing general advice on the review.

  • Interpreting the data.

  • Providing a clinical perspective.

  • Providing a policy perspective.

FJH:

  • Collecting data for the review.

  • Undertaking searches.

  • Screening search results.

  • Organising retrieval of papers.

  • Screening retrieved papers against inclusion criteria.

  • Appraising quality of papers.

  • Extracting data from papers.

  • Writing to authors of papers to ask for additional information.

  • Providing additional data about papers.

  • Obtaining and screening data on unpublished studies.

  • Managing data for the review.

  • Entering data into RevMan 2014.

  • Analysing data.

  • Interpreting data.

  • Providing a clinical perspective.

  • Updating the review.

  • Writing the updated review.

GA:

  • Providing a methodological perspective.

  • Providing general advice on the review.

MWB:

  • Providing a clinical perspective.

  • Providing a policy perspective.

  • Providing general advice on the review.

Declarations of interest

MKD: none known.

CF: holds a T32 NIH training grant (United States of America).

GS: none known.

CMS: none known.

FJH: none known.

GA: none known.

MWB: none known.

Acknowledgements

This review was carried out on the basis of a systematic review and meta‐analysis published elsewhere (Diener 2007).

Christina Fitzmaurice holds a T32 NIH training grant (United States of America).

We thank Professor Dr Hanns‐Peter Knaebel for his contribution to the design and conduct of the formerly published versions of this review. He has since become Chief Executive Officer of Aesculap AG, a medical device company that produces surgical instruments, and as such is now in breach of Cochrane's commercial sponsorship policy. He is therefore no longer an author of the current and subsequent versions of this Cochrane review.

Version history

Published

Title

Stage

Authors

Version

2016 Feb 16

Pylorus‐preserving pancreaticoduodenectomy (pp Whipple) versus pancreaticoduodenectomy (classic Whipple) for surgical treatment of periampullary and pancreatic carcinoma

Review

Felix J Hüttner, Christina Fitzmaurice, Guido Schwarzer, Christoph M Seiler, Gerd Antes, Markus W Büchler, Markus K Diener

https://doi.org/10.1002/14651858.CD006053.pub6

2014 Nov 11

Pylorus‐preserving pancreaticoduodenectomy (pp Whipple) versus pancreaticoduodenectomy (classic Whipple) for surgical treatment of periampullary and pancreatic carcinoma

Review

Markus K Diener, Christina Fitzmaurice, Guido Schwarzer, Christoph M Seiler, Felix J Hüttner, Gerd Antes, Hanns‐Peter Knaebel, Markus W Büchler

https://doi.org/10.1002/14651858.CD006053.pub5

2011 May 11

Pylorus‐preserving pancreaticoduodenectomy (pp Whipple) versus pancreaticoduodenectomy (classic Whipple) for surgical treatment of periampullary and pancreatic carcinoma

Review

Markus K Diener, Christina Fitzmaurice, Guido Schwarzer, Christoph M Seiler, Gerd Antes, Hanns‐Peter Knaebel, Markus W Büchler

https://doi.org/10.1002/14651858.CD006053.pub4

2011 Feb 16

Pancreaticoduodenectomy (classic Whipple) versus pylorus‐preserving pancreaticoduodenectomy (pp Whipple) for surgical treatment of periampullary and pancreatic carcinoma

Review

Markus K Diener, Christina Heukaeufer, Guido Schwarzer, Christoph M Seiler, Gerd Antes, Hanns‐Peter Knaebel, Markus W Büchler

https://doi.org/10.1002/14651858.CD006053.pub3

2008 Apr 23

Pancreaticoduodenectomy (classic Whipple) versus pylorus‐preserving pancreaticoduodenectomy (pp Whipple) for surgical treatment of periampullary and pancreatic carcinoma

Review

Markus K Diener, Christina Heukaeufer, Guido Schwarzer, Christoph M Seiler, Gerd Antes, Hanns‐Peter Knaebel, Markus W Büchler

https://doi.org/10.1002/14651858.CD006053.pub2

2006 Apr 19

Pancreaticoduodenectomy (classical Whipple) versus pylorus‐preserving pancreaticoduodenectomy (pp Whipple) for surgical treatment of periampullary and pancreatic carcinoma

Protocol

Markus Diener, C Heukaufer, Christoph M Seiler, Gerd Antes, Markus W Büchler, Hanns‐Peter Knaebel, C Heukaeufer

https://doi.org/10.1002/14651858.CD006053

Differences between protocol and review

The review differs in five points from the previously published protocol.

  • We combined the outcomes of postoperative bleeding and postoperative gastrointestinal bleeding.

  • We discarded the outcomes of intra‐abdominal fluid collection/abscess, duration of intensive care unit stay, early and late dumping, postoperative reflux, number and status of removed lymph nodes, shock, sepsis, renal failure, weight loss, and endocrine and exocrine insufficiency because no usable data were available.

  • We performed an additional quality assessment on the basis of a checklist developed by Downs et al (Downs 1998).

  • We performed a subgroup analysis for pancreatic head cancer and periampullary cancer for survival.

  • We performed a sensitivity analysis for delayed gastric emptying by using different definitions.

  • We calculated means and standard deviations according to the methods by Hozo et al for trials that provided only medians and ranges (Hozo 2005).

Keywords

MeSH

PICOs

Population
Intervention
Comparison
Outcome

The PICO model is widely used and taught in evidence-based health care as a strategy for formulating questions and search strategies and for characterizing clinical studies or meta-analyses. PICO stands for four different potential components of a clinical question: Patient, Population or Problem; Intervention; Comparison; Outcome.

See more on using PICO in the Cochrane Handbook.

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.
Figures and Tables -
Figure 1

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
Figures and Tables -
Figure 2

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.

Study flow diagram.
Figures and Tables -
Figure 3

Study flow diagram.

Funnel plot of comparison: 1 Survival, outcome: 1.1 Overall.
Figures and Tables -
Figure 4

Funnel plot of comparison: 1 Survival, outcome: 1.1 Overall.

Funnel plot of comparison: 2 Postoperative mortality, outcome: 2.1 Postoperative mortality.
Figures and Tables -
Figure 5

Funnel plot of comparison: 2 Postoperative mortality, outcome: 2.1 Postoperative mortality.

Funnel plot of comparison: 3 Pancreatic fistula, outcome: 3.1 Pancreatic fistula.
Figures and Tables -
Figure 6

Funnel plot of comparison: 3 Pancreatic fistula, outcome: 3.1 Pancreatic fistula.

Comparison 1 Pancreatic fistula, Outcome 1 Pancreatic fistula.
Figures and Tables -
Analysis 1.1

Comparison 1 Pancreatic fistula, Outcome 1 Pancreatic fistula.

Comparison 2 Delayed gastric emptying (with sensitivity analysis), Outcome 1 All studies.
Figures and Tables -
Analysis 2.1

Comparison 2 Delayed gastric emptying (with sensitivity analysis), Outcome 1 All studies.

Comparison 2 Delayed gastric emptying (with sensitivity analysis), Outcome 2 Studies in which DGE was defined (includes different definitions).
Figures and Tables -
Analysis 2.2

Comparison 2 Delayed gastric emptying (with sensitivity analysis), Outcome 2 Studies in which DGE was defined (includes different definitions).

Comparison 2 Delayed gastric emptying (with sensitivity analysis), Outcome 3 Studies with the same definitions of DGE.
Figures and Tables -
Analysis 2.3

Comparison 2 Delayed gastric emptying (with sensitivity analysis), Outcome 3 Studies with the same definitions of DGE.

Comparison 3 Biliary leakage, Outcome 1 Biliary leakage.
Figures and Tables -
Analysis 3.1

Comparison 3 Biliary leakage, Outcome 1 Biliary leakage.

Comparison 4 Survival, Outcome 1 Overall.
Figures and Tables -
Analysis 4.1

Comparison 4 Survival, Outcome 1 Overall.

Comparison 4 Survival, Outcome 2 Pancreatic head carcinoma.
Figures and Tables -
Analysis 4.2

Comparison 4 Survival, Outcome 2 Pancreatic head carcinoma.

Comparison 4 Survival, Outcome 3 Periampullary cancer.
Figures and Tables -
Analysis 4.3

Comparison 4 Survival, Outcome 3 Periampullary cancer.

Comparison 5 Postoperative mortality, Outcome 1 Postoperative mortality.
Figures and Tables -
Analysis 5.1

Comparison 5 Postoperative mortality, Outcome 1 Postoperative mortality.

Comparison 6 Intraoperative blood loss, Outcome 1 Intraoperative blood loss (litres).
Figures and Tables -
Analysis 6.1

Comparison 6 Intraoperative blood loss, Outcome 1 Intraoperative blood loss (litres).

Comparison 7 Red blood cell transfusion, Outcome 1 Red blood cell transfusion.
Figures and Tables -
Analysis 7.1

Comparison 7 Red blood cell transfusion, Outcome 1 Red blood cell transfusion.

Comparison 8 Operating time, Outcome 1 Operating time (minutes).
Figures and Tables -
Analysis 8.1

Comparison 8 Operating time, Outcome 1 Operating time (minutes).

Comparison 9 Postoperative bleeding, Outcome 1 Postoperative bleeding.
Figures and Tables -
Analysis 9.1

Comparison 9 Postoperative bleeding, Outcome 1 Postoperative bleeding.

Comparison 10 Wound infection, Outcome 1 Wound infection.
Figures and Tables -
Analysis 10.1

Comparison 10 Wound infection, Outcome 1 Wound infection.

Comparison 11 Pulmonary complications, Outcome 1 Pulmonary complications.
Figures and Tables -
Analysis 11.1

Comparison 11 Pulmonary complications, Outcome 1 Pulmonary complications.

Comparison 12 Necessity for reoperation, Outcome 1 Necessity for reoperation.
Figures and Tables -
Analysis 12.1

Comparison 12 Necessity for reoperation, Outcome 1 Necessity for reoperation.

Comparison 13 Duration of hospital stay, Outcome 1 Hospital stay (days).
Figures and Tables -
Analysis 13.1

Comparison 13 Duration of hospital stay, Outcome 1 Hospital stay (days).

Comparison 14 R0 resection rate, Outcome 1 R0 resection rate.
Figures and Tables -
Analysis 14.1

Comparison 14 R0 resection rate, Outcome 1 R0 resection rate.

Summary of findings for the main comparison. Postoperative mortality and DGE after surgical treatment for periampullary or pancreatic carcinoma

Postoperative mortality and DGE after surgical treatment for periampullary or pancreatic carcinoma

Patient or population: people with surgical treatment for periampullary or pancreatic carcinoma
Settings: surgical departments in Asia and Europe
Intervention: PPW

Comparison: CW

Outcomes

Illustrative comparative risks* (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Comments

Assumed risk

Corresponding risk

CW

PPW

Postoperative mortality

60 per 1000

39 per 1000
(16 to 89)

OR 0.64
(0.26 to 1.54)

464
(7 trials)

⊕⊕⊕⊝
moderatea

Pancreatic fistula

93 per 1000

88 per 1000

(48 to 158)

OR 0.95

(0.49 to 1.84)

468

(7 trials)

⊕⊕⊝⊝

lowa,b

DGE

235 per 1000

482 per 1000

(244 to 728)

OR 3.03

(1.05 to 8.70)

459

(7 trials)

⊕⊕⊝⊝
lowa,b

*The basis for the assumed risk was the mean risk in the control group across studies. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
CI: confidence interval; CW: classic Whipple; DGE: delayed gastric emptying; OR: odds ratio; PPW: pylorus‐preserving Whipple

GRADE Working Group grades of evidence.
High quality: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low quality: We are very uncertain about the estimate.

aConfidence intervals are wide due to small number of events. No sample size calculation was reported for trials except for Seiler 2005 and Tran 2004.
bStrong heterogeneity due to differing outcome definitions and clinical heterogeneity between trials.

Figures and Tables -
Summary of findings for the main comparison. Postoperative mortality and DGE after surgical treatment for periampullary or pancreatic carcinoma
Summary of findings 2. Survival after surgical treatment for periampullary or pancreatic carcinoma

Survival after surgical treatment for periampullary or pancreatic carcinoma

Patient or population: people with surgical treatment for periampullary or pancreatic carcinoma
Settings: surgical departments in Asia and Europe
Intervention: PPW

Comparison: CW

Outcomes

Illustrative comparative risks* (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Comments

Assumed risk

Corresponding risk

CW

PPW

Overall survival
Follow‐up: 18 to 144 months

Medium‐risk population

HR 0.84
(0.61 to 1.16)

284
(3 trials)

⊕⊕⊝⊝
lowa,b

*The basis for the assumed risk (e.g. median control group risk across studies) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
CI: confidence interval; CW: classic Whipple; HR: hazard ratio; PPW: pylorus‐preserving Whipple

GRADE Working Group grades of evidence.
High quality: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low quality: We are very uncertain about the estimate.

aInadequate information about sequence generation and allocation concealment. No intention‐to‐treat analysis.
bVery wide confidence intervals, unknown number of losses to follow‐up, low total number of events, no sample size calculations reported.

Figures and Tables -
Summary of findings 2. Survival after surgical treatment for periampullary or pancreatic carcinoma
Summary of findings 3. Operating time, intraoperative blood loss, and red blood cell transfusion in surgical treatment for periampullary or pancreatic carcinoma

Operating time, intraoperative blood loss, and red blood cell transfusion in surgical treatment for periampullary or pancreatic carcinoma

Patient or population: people with surgical treatment for periampullary or pancreatic carcinoma
Settings: surgical departments in Asia and Europe
Intervention: PPW

Comparison: CW

Outcomes

Illustrative comparative risks (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Comments

CW vs PPW

Intraoperative blood loss (millilitres)

Mean intraoperative blood loss in the intervention group was
320 millilitres lower

than in the control group
(620 to 30 lower)

MD ‐0.32

(‐0.62 to ‐0.03)

404
(5 trials)

⊕⊕⊝⊝
lowa,b,c

Red blood cell transfusion (units)

Mean red blood cell transfusion in the intervention group was

0.47 units lower

than in the control group

(0.86 to 0.07 lower)

MD ‐0.47

(‐0.86 to ‐0.07)

273

(5 trials)

⊕⊕⊝⊝
lowa,b

Operating time

(minutes)

Mean operating time in the intervention group was
45 minutes lower

than in the control group
(75 to 16 lower)

MD ‐45.22

(‐74.67 to ‐15.78)

472
(7 trials)

⊕⊕⊝⊝
lowa,b,c

CI: confidence interval; CW: classic Whipple; MD: mean difference; PPW: pylorus‐preserving Whipple

GRADE Working Group grades of evidence.
High quality: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low quality: We are very uncertain about the estimate.

aSerious limitations in the study design of Bloechle 1999, Lin 1999, Taher 2015, and Wenger 1999 are a potential source of bias. All are characterised by small sample sizes, lack of blinding, and incomplete outcome reporting.
bThe distribution of these continuous outcomes is known to be potentially skewed, which introduces a potential bias in the analyses.
cStrong heterogeneity in the analyses.

Figures and Tables -
Summary of findings 3. Operating time, intraoperative blood loss, and red blood cell transfusion in surgical treatment for periampullary or pancreatic carcinoma
Comparison 1. Pancreatic fistula

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Pancreatic fistula Show forest plot

7

468

Odds Ratio (M‐H, Random, 95% CI)

0.95 [0.49, 1.84]

Figures and Tables -
Comparison 1. Pancreatic fistula
Comparison 2. Delayed gastric emptying (with sensitivity analysis)

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 All studies Show forest plot

7

459

Odds Ratio (M‐H, Random, 95% CI)

3.03 [1.05, 8.70]

2 Studies in which DGE was defined (includes different definitions) Show forest plot

4

355

Odds Ratio (M‐H, Random, 95% CI)

2.00 [0.55, 7.22]

3 Studies with the same definitions of DGE Show forest plot

2

198

Odds Ratio (M‐H, Random, 95% CI)

4.02 [0.14, 119.16]

Figures and Tables -
Comparison 2. Delayed gastric emptying (with sensitivity analysis)
Comparison 3. Biliary leakage

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Biliary leakage Show forest plot

5

380

Odds Ratio (M‐H, Random, 95% CI)

0.96 [0.15, 6.17]

Figures and Tables -
Comparison 3. Biliary leakage
Comparison 4. Survival

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Overall Show forest plot

3

284

Hazard ratio (Random, 95% CI)

0.84 [0.61, 1.16]

2 Pancreatic head carcinoma Show forest plot

3

203

Hazard ratio (Random, 95% CI)

0.73 [0.43, 1.22]

3 Periampullary cancer Show forest plot

2

74

Hazard ratio (Random, 95% CI)

0.83 [0.39, 1.76]

Figures and Tables -
Comparison 4. Survival
Comparison 5. Postoperative mortality

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Postoperative mortality Show forest plot

7

464

Odds Ratio (M‐H, Random, 95% CI)

0.64 [0.26, 1.54]

Figures and Tables -
Comparison 5. Postoperative mortality
Comparison 6. Intraoperative blood loss

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Intraoperative blood loss (litres) Show forest plot

5

404

Mean Difference (IV, Random, 95% CI)

‐0.32 [‐0.62, ‐0.03]

Figures and Tables -
Comparison 6. Intraoperative blood loss
Comparison 7. Red blood cell transfusion

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Red blood cell transfusion Show forest plot

5

273

Mean Difference (IV, Random, 95% CI)

‐0.47 [‐0.86, ‐0.07]

Figures and Tables -
Comparison 7. Red blood cell transfusion
Comparison 8. Operating time

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Operating time (minutes) Show forest plot

7

472

Mean Difference (IV, Random, 95% CI)

‐45.22 [‐74.67, ‐15.78]

Figures and Tables -
Comparison 8. Operating time
Comparison 9. Postoperative bleeding

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Postoperative bleeding Show forest plot

5

380

Odds Ratio (M‐H, Random, 95% CI)

0.74 [0.32, 1.74]

Figures and Tables -
Comparison 9. Postoperative bleeding
Comparison 10. Wound infection

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Wound infection Show forest plot

4

251

Odds Ratio (M‐H, Random, 95% CI)

0.85 [0.35, 2.05]

Figures and Tables -
Comparison 10. Wound infection
Comparison 11. Pulmonary complications

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Pulmonary complications Show forest plot

3

218

Odds Ratio (M‐H, Random, 95% CI)

0.67 [0.29, 1.58]

Figures and Tables -
Comparison 11. Pulmonary complications
Comparison 12. Necessity for reoperation

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Necessity for reoperation Show forest plot

3

320

Odds Ratio (M‐H, Random, 95% CI)

0.80 [0.38, 1.68]

Figures and Tables -
Comparison 12. Necessity for reoperation
Comparison 13. Duration of hospital stay

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Hospital stay (days) Show forest plot

5

366

Mean Difference (IV, Random, 95% CI)

0.26 [‐2.04, 2.56]

Figures and Tables -
Comparison 13. Duration of hospital stay
Comparison 14. R0 resection rate

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 R0 resection rate Show forest plot

4

359

Odds Ratio (M‐H, Random, 95% CI)

0.92 [0.39, 2.15]

Figures and Tables -
Comparison 14. R0 resection rate