Table 9.

Sleep and clinical forms

Sleep	% Classical (n = 96)	% Z-RTT (n = 19)	% Hanefeld (n = 13)	% Congenital (n = 1)	% ARTT-NOS (n = 20)
None	66.7	78.9	38.5	–	40
Mild	17.7	21.1	46.1	100	45
Severe	15.6	–	15.4	–	15