Effects of perineural catheter location—adductor canal versus femoral—on analgesia after tricompartment knee arthroplasty. Data presented are the percentage of each treatment group to have a mean numeric rating scale (NRS) for pain less than 4 at each time point (A); Kaplan–Meier estimates of the cumulative percentages of subjects with a mean NRS less than 4 at each time point and subsequent time points (B); and mean NRS presented as median (horizontal bar) with 25th to 75th (box) and 10th to 90th (whiskers) percentiles (C). Subjects with a continuous adductor canal block attained a mean NRS less than 4 in a median of 51 h (interquartile range, 29 to 58 h) compared with 49 h (29 to 61 h) for those with a continuous femoral nerve block (P = 0.97).