Table 4.

Regression Analyses Examining Nighttime Media Use in Relation to Circadian Preference, Daytime Sleepiness, and Sleep Problems

	Adolescent Report								Parent Report
	Circadian Preference		Daytime Sleepiness		Sleep Duration		Sleep/Wake Problems		Sleep Duration		Total Sleep Problems
	β	t	β	t	β	t	β	t	β	t	β	t
Sex	.15	1.30	−.28	−2.56*	.07	.54	−.21	−1.82†	−.11	−.93	−.11	−.94
Age	−.04	−.35	.004	.03	−.23	−1.74†	−.10	−.77	.07	.59	−.14	−1.17
ADHD medication	−.01	−.06	−.21	−1.94†	.05	.34	.02	.17	.10	.71	.09	.72
Pubertal development	.13	1.17	.003	.02	.16	1.44	−.05	−.50	−.02	−.19	.04	.36
ADHD-IN symptoms	−.14	−1.19	.01	.08	.01	.11	−.01	−.08	.13	1.09	.40	3.58***
ADHD-HI symptoms	.24	1.97†	.18	1.67	−.16	−1.27	−.01	−.09	−.10	−.86	−.07	−.58
Nighttime media use	−.22	−1.99‡	−.28	−2.56†	−.25	−2.15*	.32	2.92**	.33	3.01**	.32	3.03**

Note. For sex, 0 = female, 1 = male. For ADHD medication use, 0 = not prescribed stimulant medication, 1 = prescribed stimulant medication. For circadian preference, higher scores indicate greater morningness preference. For pubertal development, higher scores indicate more advanced pubertal development. For adolescent reported sleep duration, higher scores indicate longer duration, whereas for parent reported sleep duration lower scores indicate longer duration.

^†p<.10

^‡p=.051.

^*p<.05.

^**p<.01.

^***p<.001.