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Table 2 Assessment of quality of RCTs (Jadad scale)

From: Laparoscopic versus open approach in gastrectomy for advanced gastric cancer: a systematic review

References Year Randomization Blinding Withdraw and dropout Jadad’s score
Wang et al. [48] 2019 2 0 0 2
Lee et al. [47] 2019 2 0 0 2
Shi et al. [44] 2018 2 0 0 2
Park et al. [43] 2018 2 0 2 4
Li1 et al. [35] 2016 2 0 0 2
Hu et al. [34] 2016 2 0 2 4
Cai et al. [15] 2011 1 0 1 1
Cui et al. [30] 2015 2 0 0 2
  1. Randomization: randomization was described with appropriate method—2 score, randomization was described without appropriate method—1 score, no randomization—0 score. Blinding: blinding was performed on all doctors and patients—2 score, blinding was partially performed on doctors and patients—1 score, no blinding—0 score. Withdraw and dropout: the reason of withdraw and dropout was described—1 score, the reason of withdraw and dropout was not described—0 score. Quality: high-quality trials should score ≥ 3, moderate-quality trials should score ≥ 2