Table 3.

VPSG data of subgroup A (1–7 y) compared with control subgroup Ac (1–10 y).

	PKS sub-A (n = 7)		Controls sub-Ac (n = 7)		Mann-Whitney
	Median	IQR	Median	IQR	p
TIB (min)	679	148.5	573	36	0.0630
SPT (min)	672	176.5	550	26.5	0.0793
TST (min)	460	135.5	527	57.5	0.2611
SEI (%)	79.9	19.8	95.2	1	0.0025*
SOL (min)	9.2	15.45	9.7	2.9	0.1762
FRL (min)	99.5	75.5	63	74.25	0.2843
WASO (%SPT)	19.2	24.55	1.3	1.35	0.0025*
N1 (%TST)	10.6	7.1	4	5	0.015*
N2 (%TST)	36	8.5	54.9	10	0.0052*
N3 (%TST)	27.3	9.5	16.2	2.45	0.0011*
REM (%TST)	20.2	10.95	28.1	5.15	0.015*
AI (n/h TST)	17.7	10.3	5.5	2.25	0.0011*
AWI (n/h SPT)	1	0.9	0.32	0.49	0.0207*

IQR, interquartile range; TIB, time in bed; SPT, sleep period time; TST, total sleep time; SEI, sleep efficiency index; SOL, sleep onset latency; FRL, first REM latency; WASO, wakefulness after sleep onset; AI, arousal index; AWI, awakenings index.

^*p < 0.05.