From: Rett syndrome: a wide clinical and autonomic picture
ISS total
% Classical
(n = 98)
% Z-RTT
(n = 19)
% Hanefeld
(n = 13)
% Congenital
(n = 1)
% ARTT-NOS
(n = 20)
Mean (SD)
19.5 (5.9)
11.7 (3.7)
19.4 (4.8)
26
21.4 (6)