From: Rett syndrome: a wide clinical and autonomic picture
ISS total
Early truncating
(n = 22)
Late truncating
(n = 8)
Large deletion
(n = 18)
Frameshift
(n = 9)
Missense
(n = 39)
C ter del
Mean (SD)
21.3 (6.2)
16.7 (4.7)
19.2 (5.9)
20.3 (7)
18.4 (5.7)
14.2 (6)