Fig. 2From: Retroclavicular vs Infraclavicular block for brachial plexus anesthesia: a multi-centric randomized trialVisual representation of non-inferiority margin for the change in percentage of the performance time when comparing RCB approach to the standard ICB. The RCB approach is 7.1% faster than the ICB approach while the one-sided 95%CI is going over the 5% margin by 0.8%Back to article page