Table 3.

Distribution of Activity Level “S” Events in Relation to Visual Movement Event Severity and sleep/arousal/wake status (as defined by PSG). A higher “S” level was associated with more severe visual movement events. and with wake status.

	S1	S2	S3	S4	S5	Pearson	Df	p-value
N (percent) Visual Movement Events						Chi-Square
Mild	129 (85)	37 (58)	6 (24)	6 (29)	2 (18)	150	12	<0.001
Moderate	15 (10)	17 (27)	18 (72)	7 (33)	4 (36)
Severe	8 (5)	10 (16)	1 (4)	8 (38)	5 (45)
Total Epochs	152	64	25	21	11
PSG Status	S1	S2	S3	S4	S5	Pearson Chi-Square	Df	p-value
Sleep	0 (0)	0 (0)	0 (0)	0 (0)	0 (0)	37	12	<0.001
Arousal	77 (51)	24 (38)	13 (52)	7 (33)	4 (36)
Wake	75 (49)	40 (62)	12 (48)	14 (67)	7 (64)
Total Epochs	152	64	25	21	11