Table III.

Fixed Effects of Child Sleep as Predictors of Parent Sleep

Outcome	Parent TST
Fixed effect	b	SE	t	p
Child TST mean (across)	0.56	0.18	3.08	.002**
Child TST diff (within)	0.31	0.08	3.81	<.001***
Group (JIA)	0.30	0.27	1.11	.27
Age	−0.06	0.12	−0.56	.58
Outcome	Parent WASO (min)
Fixed effect	b	SE	t	p
Child WASO mean (across)	0.09	0.28	0.33	.74
Child WASO diff (within)	0.17	0.05	3.32	.001**
Group (JIA)	16.62	10.63	1.57	.12
Age	−1.88	4.57	−0.41	.68
Outcome	Parent SE (%)
Fixed effect	b	SE	t	p
Child SE mean (across)	0.19	0.29	0.67	.51
Child SE diff (within)	0.17	0.06	3.03	.002**
Group (JIA)	−3.15	2.01	−1.51	.13
Age	0.10	0.91	0.11	.91
Outcome	Parent SQ (%)
Fixed effect	b	SE	t	p
Child SQ mean (across)	0.71	0.10	6.87	<.001***
Child SQ diff (within)	0.52	0.05	9.83	<.001***
Group (JIA)	0.16	0.33	0.49	.63
Age	0.31	0.14	2.18	.03*

Note. TST = total sleep time; SE = sleep efficiency; WASO = wake after sleep onset; SQ = sleep quality reported in sleep diary; group fixed effect was entered as TD-0, JIA-1.

*p < .05; **p < .01; ***p < .001.