Table 3. Mutation frequencies for CMT and related neuropathies.

CMT1A duplication	CMT1A duplication	HNPP deletion	PMP22 mutation	Cx32 mutation	MPZ mutation
Total	CMT1	Total/HNPP	Total	Total	Total
43%	70%	11%/92%	2.5%	12%	5%

Abbreviations: CMT1A, Charcot–Marie–Tooth disease type 1A; HNPP, hereditary neuropathy with liability to pressure palsies.