Table 2.

VPSG data of PKS children compared with controls of all ages.

	PKS (n = 14)		Controls (n = 14)		Mann–Whitney
	Median	IQR	Median	IQR	p
TIB (min)	659.50	103.00	563.5	67.5	0.0041*
SPT (min)	646.00	115.25	545	62.75	0.008*
TST (min)	542.50	141.50	522.5	86.25	0.4286
SEI (%)	81.85	25.27	94.3	4.25	0.0006*
SOL (min)	8.40	21.30	8.6	3.375	0.4364
FRL (min)	70.50	62.62	75.5	59.15	0.4443
WASO (%SPT)	13.85	24.05	2.35	4.825	0.0011*
N1 (%TST)	7.30	4.35	4.15	2.725	0.007*
N2 (%TST)	40.50	11.57	52.8	9.125	0.0005*
N3 (%TST)	32.50	9.93	16.2	4.025	<0.00001*
REM (%TST)	19.20	6.57	27.25	5.575	0.0004*
AI (n/h TST)	12.7	11.35	4.4	2.1125	<0.00001*
AWI (n/h SPT)	0.95	0.65	0.81	0.9875	0.1788

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.