Fig. 2
Postoperative opioid consumption at 24 h. Meta-analysis evaluating the effect of erector spinae plane block on opioid consumption compared to control at 24 h following surgery. The overall effect of the erector spinae plane block versus control was estimated as a random effect. The point estimate for the overall effect was − 8.84 (95%CI: − 12.54 to − 5.14), (P < 0.001) mg IV morphine equivalents. The weighted mean difference for individual studies is represented by the square symbol on Forrest plot, with 95% CI of the difference shown as a solid line