Fig. 4.
Noninferiority diagram with the observed difference between the adductor canal block (ACB) group and the femoral nerve block (FNB) group in area under the curve for the postoperative rest pain severity visual analog scale scores for the first 24 h postoperatively. The dashed line designates the noninferiority margin (Δ). The error bars designate the 95% CI of the (ACB–FNB) difference. The diagram indicates noninferiority of ACB for the outcome examined.