Table 3.

Polysomnographic analysis of sleep disorders in ASD and controls.¹

	Control	ASD
Snoring	23/23 (100%)	17/22 (77%)
Arousal index2	6.0 ± 4.4	13.2 ± 8.8*
Sleep latency	22.4 ± 13.9 min	16.8 ± 22.0 min
Total sleep time	451 ± 59 min	395 ± 94 min
%REM	20.4 ± 4.6	14.2 ± 7.7**
REM latency	114 ± 47 min	146 ± 106 min
Parasomnias3	3/20	14/23***
PLMI	2.4 ± 5.9 (5/23)	2.45 ± 2.4 (19/23)

¹The total number was 23 each for controls and ASD children.

²All the indices are events per hour.

³The videos of three control subjects were not of good quality and deemed to be missing.

^*t-test showed significantly difference (p = 0.004).

^**Two sample t-test showed a significant difference (p = 0.002).

^***Fisher’s exact test showed a significant association of parasomnias with the ASD group (p = 0.002).