Table 4.

Early childhood sleep variables predicting later probability of suicidal thoughts and behaviors from childhood to adolescence, controlling for child sex, early childhood depression severity, and income-to-needs ratio

	DV = Suicidal Thoughts				DV = Suicidal Behaviors
	Estimate	SE	t	p	Estimate	SE	t	p
Primary Analysis:
Intercept	−3.63	.41	−8.95	<.001	−8.72	1.95	−4.47	<.001
Age	.00	.11	.03	.98	.67	.28	2.38	.02
Age squared	−.04	.02	−1.60	.11	−.09	.04	−2.34	.02
Female sex	−.30	.37	−.81	.42	−1.16	1.15	−1.01	.31
EC depression severity	.25	.14	1.77	.08	.98	.46	2.14	.03
EC Income-to-needs	−.21	.17	−1.25	.21	−.54	.51	−1.06	.29
Composite sleep index	1.17	.47	2.46	.01	1.05	1.32	.80	.43
Secondary Analyses:
Intercept	−3.61	.41	−8.87	<.001	−8.68	1.96	−4.44	<.001
Age	−.01	.11	−.06	.96	.67	.28	2.36	.02
Age squared	−.04	.02	−1.48	.14	−.09	.04	−2.35	.02
Female sex	−.34	.38	−.91	.36	−1.24	1.15	−1.08	.28
EC depression severity	.34	.14	2.51	.01	1.05	.45	2.32	.02
EC Income-to-needs	−.27	.17	−1.59	.11	−.59	.51	−1.14	.25
Total sleep duration	−.23	.14	−1.70	.09	−.23	.37	−.62	.53
Intercept	−3.68	.41	−8.88	<.001	−8.63	1.91	−4.51	<.001
Age	.05	.12	.46	.65	.67	.28	2.37	.02
Age squared	−.03	.02	−1.33	.18	−.09	.04	−2.35	.02
Female sex	−.41	.38	−1.07	.28	−1.26	1.14	−1.10	.27
EC depression severity	.35	.14	2.55	.01	1.02	.44	2.31	.02
EC Income-to-needs	−.23	.17	−1.35	.18	−.51	.50	−1.02	.31
Nighttime sleep duration	−.63	.21	−3.06	.002	−.68	.52	−1.31	.19
Nighttime sleep duration x age	.20	.07	2.88	.004	--	--	--	--
Intercept	−3.59	.41	−8.85	<.001	−8.79	1.98	−4.43	<.001
Age	.02	.11	.16	.87	.68	.28	2.41	.02
Age squared	−.03	.02	−1.31	.19	−.09	.04	−2.32	.02
Female sex	−.35	.38	−.93	.35	−1.23	1.16	−1.06	.29
EC depression severity	.36	.14	2.59	.01	1.09	.45	2.40	.02
EC Income-to-needs	−.27	.17	−1.58	.11	−.62	.52	−1.19	.23
Nap sleep duration	.12	.20	.60	.55	−.00	.61	−.00	1.00
Intercept	−3.60	.41	−8.85	<.001	−8.67	1.96	−4.43	<.001
Age	.01	.11	.11	.92	.67	.28	2.41	.02
Age squared	−.03	.02	−1.31	.19	−.09	.04	−2.42	.02
Female sex	−.34	.38	−.90	.37	−1.05	1.11	−.95	.34
EC depression severity	.36	.14	2.51	.01	.89	.44	2.03	.04
EC Income-to-needs	−.28	.17	−1.62	.11	−.48	.50	−.97	.33
Daytime sleepiness	−.01	.12	−.05	.96	.40	.30	1.33	.19
Intercept	−3.61	.40	−9.09	<.001	−8.76	1.95	−4.50	<.001
Age	.02	.11	.15	.88	.67	.28	2.42	.02
Age squared	−.03	.02	−1.46	.15	−.09	.04	−2.30	.02
Female sex	−.30	.37	−.81	.42	−1.17	1.15	−1.02	.31
EC depression severity	.25	.14	1.79	.07	1.01	.45	2.23	.03
EC Income-to-needs	−.32	.17	−1.90	.06	−.65	.52	−1.27	.21
Bedtime resistance	.54	.18	2.95	.003	.48	.51	.95	.34
Intercept	−3.60	.41	−8.85	<.001	−8.79	2.00	−4.40	<.001
Age	.01	.11	.10	.92	.68	.28	2.43	.02
Age squared	−.03	.02	−1.32	.19	−.09	.04	−2.32	.02
Female sex	−.34	.38	−.89	.37	−1.27	1.15	−1.11	.27
EC depression severity	.36	.14	2.61	.01	1.11	.46	2.40	.02
EC Income-to-needs	−.27	.17	−1.60	.11	−.67	.51	−1.31	.19
Sleep regularity	−.04	.20	−.17	.86	.83	.74	1.11	.27
Intercept	−3.54	.39	−8.96	<.001	−8.75	1.97	−4.43	<.001
Age	−.00	.11	−.02	.98	.68	.28	2.41	.02
Age squared	−.03	.02	−1.45	.15	−.09	.04	−2.33	.02
Female sex	−.40	.37	−1.09	.28	−1.21	1.15	−1.05	.29
EC depression severity	.32	.13	2.45	.01	1.09	.45	2.40	.02
EC Income-to-needs	−.17	.16	−1.04	.30	−.65	.53	−1.23	.22
Bedtime	.47	.19	2.46	.01	−.18	.59	−.31	.75
Intercept	−3.60	.41	−8.83	<.001	−8.79	1.98	−4.43	<.001
Age	0.01	.11	.11	.91	.68	.28	2.41	.02
Age squared	−.03	.02	−1.31	.19	−.09	.04	−2.33	.02
Female sex	−.34	.38	−.90	.37	−1.23	1.16	−1.06	.29
EC depression severity	.36	.14	2.61	.01	1.09	.45	2.40	.02
EC Income-to-needs	−.28	.17	−1.64	.10	−.62	.52	−1.19	.23
Waketime	.02	.31	.07	.94	−.00	.90	−.00	1.00
Intercept	−3.59	.41	−8.86	<.001	−8.78	1.98	−4.43	<.001
Age	.01	.11	.11	.92	.68	.28	2.41	.02
Age squared	−.03	.02	−1.34	.18	−.09	.04	−2.33	.02
Female sex	−.33	.38	−.89	.38	−1.21	1.16	−1.05	.29
EC depression severity	.34	.14	2.36	.02	1.09	.47	2.31	.02
EC Income-to-needs	−.26	.17	−1.53	.13	−.61	.52	−1.17	.24
Sleep onset latency	.00	.01	.44	.66	−.00	.02	−.03	.97
Intercept	−3.56	.40	−8.88	<.001	−8.79	1.98	−4.45	<.001
Age	.01	.11	.06	.95	.68	.28	2.41	.02
Age squared	−.03	.02	−1.41	.16	−.09	.04	−2.31	.02
Female sex	−.36	.37	−.96	.34	−1.13	1.16	−.97	.33
EC depression severity	.39	.14	2.80	.01	1.03	.45	2.28	.02
EC Income-to-needs	−.28	.17	−1.68	.09	−.60	.51	−1.17	.24
Number of nighttime awakenings	−.31	.22	−1.37	.17	.38	.53	.71	.48
Intercept	−3.61	.40	−8.96	<.001	−8.78	1.98	−4.44	<.001
Age	.03	.11	.24	.81	.68	.28	2.41	.02
Age squared	−.03	.02	−1.44	.15	−.09	.04	−2.33	.02
Female sex	−.31	.37	−.85	.40	−1.24	1.16	−1.07	.28
EC depression severity	.31	.14	2.26	.02	1.09	.46	2.40	.02
EC Income-to-needs	−.31	.17	−1.86	.06	−.61	.52	−1.18	.24
Reluctance to sleep alone	.34	.14	2.41	.02	−.07	.39	−.18	.86

Note: EC = early childhood; Bolded text indicates sleep predictors significant in the model at p < .05