From: Rett syndrome: a wide clinical and autonomic picture
Phenotype
Classical
(n = 86)
Z-RTT
(n = 19)
Hanefeld RTT
(n = 10)
Congenital
(n = 1)
ARTT-NOS
(n = 18)
Feeble
37 %
53 %
–
50 %
Forceful
49 %
42 %
80 %
100 %
39 %
Apneustic
13 %
5 %
20 %
Normal
1 %
11 %