Fig. 3.  Cumulative morphine consumption at 48 h. *= indirect comparison; # = mixed comparison; p = posterior probability of the treatment effect given the data; ++= when the study number was designed with two intervention groups and one comparison group, the number of patients in the comparison group was equally divided into two comparison groups. CFNB = continuous femoral nerve block; PCA = patient-controlled analgesia; Sciatic = sciatic nerve block; SSFNB = single-shot femoral nerve block.