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Table 1 Quality assessment of included studies. The Cochrane risk of bias tool was used to assess the quality of the randomized controlled trials while the ROBINS-I tool was used to assess the non-randomized trials

From: Effect of preoperative ultrasound mapping of the saphenous vein on leg wound complications after coronary artery bypass surgery: a systematic review

Study

Sequence Generation

Allocation concealment

Blinding of participant and personnel

Blinding of outcome assessors

Incomplete outcome data

Selective outcome reporting

 

Cochrane Risk of Bias Tool

Zarepur et al. [21]

U

L

H

H

L

L

 

Luckraz et al. [20]

H

H

H

H

L

L

 

Study

Bias due to confounding

Bias due to selection of participants

Bias in classification of interventions

Bias due to deviations of intended interventions

Bias due to missing data

Bias in measurements of outcomes

Bias in selection of the reported results

ROBINS-I Tool

Aguirre et al. [6]

S

M

M

S

L

M

L

Lopes et al. [22]

S

S

M

M

NI

M

L

Temizkan et al. [12]

M

L

M

M

NI

M

L

  1. Abbreviations: H high risk of bias, L low risk of bias, U unclear risk of bias, S serious risk bias, M moderate risk of bias, NI no Information