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Table 1 Quality assessment of the included studies

From: Comparison of Retzius-sparing robot-assisted laparoscopic radical prostatectomy vs standard robot-assisted radical prostatectomy: a meta-analysis

Study Design Selection Comparability Outcome Total
Representativeness of exposed cohort Selective of nonexposed Cohort Ascertainment of exposure Outcome not present at start Assessment of outcome Adequate follow-up length Adequacy of follow-up
Abu-Ghanem P, S * * * * ** * * * 9
Chang 2017 R, S * * * * * * * * 8
Sayyid P, S * * * * ** * * * 9
Dalela R, S * * * * * * * * 8
Lim P, S * * * * ** * * * 9
Chang 2018 R, S * * * * * * * * 8
   Randomization Allocation concealment   Blinding    Quality level   
Asimakopoulos RCT Adequate Unclear   Unclear    Clear   
Menon RCT Adequate Unclear   Unclear    Unclear   
  1. P Prospectively study, RCT Randomised controlled trial, R Respectively study, M mutli-centers