From: Rett syndrome in Ireland: a demographic study
Country
No. of individuals with RTT included in studies
Total population (million)
References
USA and Canada
919
331.9
[30,31,32,33,34,35]
Italy
84
59.11
[4, 36]
Denmark
27
5.86
[37,38,39]
Australia
349
25.69
[14, 40,41,42,43,44,45,46]
UK
91
67.33
[43, 47,48,49]
Netherlands & Belgium
137
29.12
[50, 51]
Brazil
214.3
[52]
Poland
23
37.75
[53]
Sweden
125
10.42
[54]
Ireland
25
5.03