Table 2.

Assessment of neuropathy: results from the neurological examinations, nerve conduction studies, and composite total neuropathy score.

Mean scores (SD)	Subjects (n = 37)	Population norms
Neuropathy impairment score (NIS)	3.0 (3.6)	0
Nerve conduction studies (NCS)
Peroneal nerve CMAP amplitude (mV)	3.8 (2.0)	9.5 (3.7)
Sural nerve SNAP amplitude (µV)	16.1 (9.9)	14.4 (7.0)
Median nerve CMAP amplitude (mV)*	10.1 (3.6)	13.2 (4.1)
Median nerve SNAP amplitude (µV)†	36.8 (18.4)	25.7 (8.9)
Total neuropathy score reduced (TNSr)	4.0 (2.0)

CMAP, compound muscle action potential; SNAP, sensory nerve action potential.

^*One child refused median nerve CMAP.

^†Two children refused median nerve SNAP.