. Author manuscript; available in PMC: 2014 May 29.

Published in final edited form as: Brain. 2009 Sep 18;132(0 11):3175–3186. doi: 10.1093/brain/awp236

Table 3. Comparative proportions and estimated point prevalences of affected patients from 1954 (Walton and Nattrass) and current studies.

Walton and Natrass	Number (%) affected (n = 105)	Current study	Number (%) affected (n = 1105)	Estimated point prevalence
‘Duchenne type’	48 (46)	DMD	124 (11.2)	8.29^a
		BMD/IMD	116 (10.5)
		Total	253 (22.9)
‘Facioscapulohumeral’	15 (14)	Facioscapulohumeral	118 (10.7)	3.95
‘Limb girdle’	18 (17)	All limb girdle including specific subgroups	68 (6.15)	2.27
Dystrophia myotonica subgroup of ‘myotonic syndrome’	15 (14)	Myotonic dystrophy type 1	311 (28.1)	10.4

Males only