Table 1.

Bivariate Correlations, Means, and Standard Deviations for Main Study Variables and Covariates

	1	2	3	4	5	6	7	8	9	10	11	12
1. Sex	–
2. Race/ethnicity	−.07	–
3. SES	.03	−.23**	–
4. zBMI	−.03	.29***	.15	–
5. Sleep minutes	−.34***	−.18*	.11	−.11	–
6. M-E	.02	.07	−.02	.08	.13	–
7. Sleep-wake problems	−.03	.00	.01	−.06	−.17	−.42***	–
8. Sleepiness	−.21*	.16*	−.12	.03	−.06	−.29***	.44**	–
9. Externalizing	−.02	−.08	−.01	−.01	−.06	−.39***	.46***	.30***	–
10. Internalizing	−.13	.07	−.05	.03	−.15	−.25***	.38***	.43***	.58***	–
11. Depression	−.08	.00	−.14	−.01	−.10	−.33***	.53***	.28***	.61***	.76***	–
12. Anxiety	−.22**	.00	−.10	.04	−.14	−.21**	.35***	.37***	.51***	.83***	.70***	–
M	–	–	2.99	0.77	397.30	27.53	19.76	13.40	49.45	49.36	7.40	8.90
SD	–	–	1.82	1.06	56.90	4.51	7.06	4.19	9.79	12.27	8.06	8.06
Range (Minimum)	–	–	0.00	–2.65	228.50	15.00	10.00	9.00	29.00	27.00	0.00	0.00
(Maximum)			8.91	2.88	506.83	41.00	50.00	36.00	76.00	95.00	36.00	33.00

Note. Sex was coded as 0 = female, 1 = male; race/ethnicity was coded as 0 = White, 1 = Black. SES = socioeconomic status (income-to-needs ratio); zBMI = standardized body mass index. Sleep minutes: 397.30 minutes = 6 hours, 37 minutes. M-E = Morningness-eveningness; higher score = more morningness. For morningness-eveningness, sleep-wake problems, and sleepiness, raw scores were used for correlations. Externalizing problems and internalizing symptoms were derived with YSR (T scores); depression symptoms were derived with CDI; anxiety symptoms were derived with RCMAS-2.

^*p < .05.

^**p < .01.

^***p < .001.