Table 3.

Assessment of axonal loss by summated motor and sensory nerve conduction amplitudes in WM, IGM-MGUS, and healthy subjects

	WM (N=30)	IgM-MGUS (N=73)	Healthy subjects	WM vs healthy subjects	IgM-MGUS vs healthy subjects	IgM-MGUS vs WM
CMAPs* Percentiles of mean (range)	8.08 (0.06 – 40.79)	6.34 (0.03 – 85.15)	50.92 (3.22 – 96.86)	P<0.001	P<0.001	p=0.419
SNAPs* Percentiles of mean (range)	0.09 (0.03 –17.23)	0.20 (0.03 – 53.59)	49.48 (0.70 – 98.66)	P<0.001	P<0.001	p=0.376

^*The mean of mean values of summed ulnar, peroneal, and tibial compound motor action potential (CMAPs) (mV) or median and sural sensory sensory nerve action potential (SNAPs)’ corrected for age, gender, height and weight as compared to reference values of healthy subjects (29–31).