Table 4.

Hierarchical Regression Analyses of Sleep Problems and Parent-proxy Report of Child HRQoL

Model	PedsQL Domain	Step	Variables	β	t for within step predictors	R2 change for step	F change	Sig.
1	Total HRQoL	1	Age	−0.54	−0.29	0.009	0.009	0.837
			Time Since Transplant	−0.52	−0.28
			Snoring	−0.12	−0.847	0.366	5.410**	0.002
		2	EDS	−0.20	−1.22
			PLMS/RLS	−0.30	−1.87†
			BEH	−0.27	−1.78†
2	Psychosocial Functioning	1	Age	−0.01	−0.03	0.01	0.17	0.84
			Time Since Transplant	−0.09	−0.48
			Snoring	−0.14	−0.95	0.36	5.20**	0.00
		2	EDS	−0.18	−1.09
			PLMS/RLS	−0.30	−1.85†
			BEH	−0.27	−1.80†
3	Physical Functioning	1	Age	−0.16	−0.86	0.02	0.40	0.67
			Time Since Transplant	0.04	0.24
			Snoring	−0.07	−0.43	0.22	2.69*	0.05
		2	EDS	−0.20	−1.11
			PLMS/RLS	−0.22	−1.25
			BEH	−0.18	−1.11
4	Emotional Functioning	1	Age	0.03	0.16	0.02	0.32	0.73
			Time Since Transplant	−0.14	−0.75
			Snoring	−0.23	−1.53	0.33	4.61**	0.00
		2	EDS	−0.09	−0.53
			PLMS/RLS	−0.36	−2.21*
			BEH	−0.14	−0.93
5	Social Functioning	1	Age	−0.03	−0.14	0.01	0.17	0.84
			Time Since Transplant	−0.08	−0.41
			Snoring	−0.05	−0.28	0.22	2.63*	0.05
		2	EDS	−0.08	−0.45
			PLMS/RLS	−0.32	−1.81†
			BEH	−0.22	−1.30
6	School Functioning	1	Age	0.10	0.56	0.01	0.25	0.78
			Time Since Transplant	0.02	0.13
			Snoring	−0.06	−0.36	0.30	3.73**	0.01
		2	EDS	−0.25	−1.41
			PLMS/RLS	−0.09	−0.53
			BEH	−0.37	−2.17*

β = standardized coefficients.

^*p<0.05,

^**p<0.01,

^†p<0.1