Table 4.

VPSG data of subgroup B (11–17 y) compared with control subgroup Bc (11–16 y).

	PKS Sub-B (n = 7)		Controls Sub-Bc (n = 7)		Mann-Whitney
	Median	IQR	Median	IQR	p
TIB (min)	636	70	526	120.5	0.0485*
SPT (min)	633	79.5	514	110	0.7927
TST (min)	545	60.5	476	106	0.2207
SEI (%)	89	15.95	91.1	1.7	0.0207*
SOL (min)	7.6	21.05	8.3	4.4	0.4483
FRL (min)	69.5	30.75	76	15.55	0.1251
WASO (%SPT)	9	15.55	6.1	2.75	0.0630
N1 (%TST)	6.4	3.35	4.3	0.85	0.1867
N2 (%TST)	41.8	10.3	52.7	5.05	0.0207*
N3 (%TST)	35	10.45	15.2	5.2	0.0011*
REM (%TST)	18.2	4.8	26.4	4.9	0.0107*
AI (n/h TST)	12.1	5.85	4.08	1.65	0.0011*
AWI (n/h SPT)	0.9	0.55	0.86	1.19	0.3264

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.