From: Rett syndrome: a wide clinical and autonomic picture
CVT
Classical
(n = 83)
Z-RTT
(n = 19)
Hanefeld
(n = 12)
Congenital
(n = 1)
ARTT-NOS
(n = 17)
Mean (SD)
5.6 (3.5)
5.9 (2.4)
6.1 (7.7)
0.7 (−)
6.4 (3.4)
Range
1.2–20
3–13.1
0.9–28.9
–
1.9–15