Interscalene Brachial Plexus Block with Liposomal Bupivacaine versus Standard Bupivacaine with Perineural Dexamethasone: A Noninferiority Trial: Erratum

The last sentence in the Results section paragraph on the primary outcome (page 438) was incorrect as published: “Superiority testing (one-sided t test) demonstrated that the average numerical rating scale pain score over 3 days postoperatively for the liposomal bupivacaine group was not superior to that of the bupivacaine with dexamethasone group (P = 0.998).”There was an error in the P-value calculation as originally published. The corrected sentence should read, “In addition, based on a manuscript peer reviewer request for superiority testing via post hoc analysis, superiority testing (two-tailed two-sample t test) was performed and found that the average numerical rating scale pain score over 72 h postoperatively was statistically significantly lower for the liposomal bupivacaine group compared to the bupivacaine with dexamethasone group (P = 0.002). However, the mean average numerical rating scale pain score over 72 h difference was 1.1, which is below the predetermined clinically meaningful margin of 1.3.” The conclusions of the investigation are unchanged.The authors regret this error. The online version and PDF of the article have been corrected.