. 2019 Aug 27;20:531. doi: 10.1186/s13063-019-3635-6

Table 1.

Classification of nerve conduction testing results

Grade	Motor latency^a	Sensory latency^b
Grade	Motor latency^a	Peak latency difference (index-small)^c	Inter-peak latency (ring)
Normal	Normal	<0.6	Single peak
Mild	Normal	≥0.6	≥0.6
Moderate	Abnormal	>1.2	>1.0
Severe	Abnormal	Absent response	Absent response

All values are in milliseconds. A result is classified as abnormal if one or more criteria are present

^aDistal motor latency values according to age-based reference limits. (For example, values of more than 4.2 ms for age of 30 years and of more than 4.3 ms for age of 50 years are considered abnormal.)

^bMedian-ulnar sensory latency difference

^cIndex finger peak latency values above 3.8 ms (women) and 4.0 ms (men) are considered abnormal