Fig. 2. Bars displaying the median and interquartile range (IQR; 25–75%) of minimum stimulation thresholds (mA) outside and inside the brachial plexus (BP) measured from the most superficial part of the BP in all patients ( Total ), diabetic patients ( With DM ), and nondiabetic patients ( Without DM ). DM = diabetes mellitus. † P < 0.0001; ‡ P < 0.0001; § P < 0.005.