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