Different Learning Curves for Axillary Brachial Plexus Block: Ultrasound Guidance versus Nerve Stimulation
Table 3
Different success rates for both ultrasound and nerve stimulation groups for the cumulated first 10, 20, 30, and 40 attempts with the according confidence intervals. Chi-square test with Bonferroni correction, .
Number of attempts and success rate (SR) per group