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Table 2 Sensitivity analysis of Opioid consumption at the first 24 h after surgery

From: Analgesic efficacy and safety of erector spinae plane block in breast cancer surgery: a systematic review and meta-analysis

Study statistics with study removed
MD Lower limit Upper limit Z value P value
Aksu 2019 [16] −7.39 −10.18 −4.61 5.21 <  0.01
Elsabeeny 2020 [17] −8.00 −11.14 −4.86 5.00 <  0.01
Gürkan 2018 [18] − 7.35 − 10.13 − 4.56 5.17 <  0.01
Gürkan 2020 [19] − 7.51 −10.32 − 4.69 5.23 <  0.01
Li 2020 [21] − 7.49 −10.31 − 4.67 5.21 <  0.01
Seelam 2020 [22] −8.37 − 10.93 −5.82 6.42 <  0.01
Sharma 2020 [23] − 8.33 −11.33 − 5.32 5.44 <  0.01
Singh 2019 [24] −7.72 − 10.68 − 4.76 5.11 < 0.01
Wang 2019 [25] − 7.64 −10.54 − 4.74 5.17 < 0.01
Yao 2019 [26] −6.91 −9.26 − 4.56 5.77 <  0.01
  1. MD = mean difference