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Table 2 Risk of bias of the included studies

From: Preclinical efficacy of stem cell therapy for skin flap: a systematic review and meta-analysis

Study A B C D E F G H I J Toal
Chehelcheraghi et al., 2020 [48] + + ? ? ? + + + ? 5
Chehelcheraghi et al., 2019 [8] + + ? ? ? ? + + ? 4
Chehelcheraghi et al., 2016 [47] + + ? ? ? ? + + ? 4
Chehelcheraghi et al., 2015 [46] + + ? ? ? ? + + ? 4
Ding et al., 2020 [45] ? + ? ? ? ? + + ? 3
Feng et al., 2020 [44] + + ? + + + + + ? 7
Gao et al., 2011 [43] + + ? ? ? + + + ? 5
Han et al., 2015 [42] + + ? ? + + + + ? 6
Leng et al., 2017 [41] + + ? ? + ? + + ? 5
Leng et al., 2012 [40] + + ? ? + + + + ? 6
Moon, 2018 [39] + + ? ? + + + + ? 6
Pak et al., 2020 [28] ? + ? ? ? ? + + ? 3
Park et al., 2017 [38] + + ? ? ? ? + + ? 4
Pu et al., 2017 [19] ? + ? ? ? ? + + ? 3
Reichenberger et al., 2012 [37] + + ? + ? + + + ? 5
Suartz et al., 2014 [36] + + ? ? ? ? + + ? 4
Tang et al., 2016 [35] ? + ? ? ? ? + + ? 3
Wang et al., 2011 [34] + + ? ? + ? + + ? 5
Yang et al., 2010 [33] + + ? ? + ? + + ? 5
Zhou et al., 2019 [18] + + ? ? ? + + + ? 5
  1. Studies fulfilling the criteria of A sequence generation, B baseline characteristics, C allocation concealment, D random housing, E blinding of investigators, F random outcome assessment, G blinding of outcome assessor, H complete outcome data, I selective outcome reporting, and J other sources of bias