Table 1.

Primary Prediction Models for Depressive Symptoms Outcomes in the Oregon and Iowa Subsamples

		Oregon			Iowa
		B	SE	β	B	SE	β
Model 1: Full Sample Continuous Outcome	Age	−0.01	0.00 ***	−0.14	−0.02	0.00 ***	−0.01
	Age2	0.00	0.00 **	0.04	0.00	0.00 ***	−0.05
	Gender	--	--	--	0.41	0.05 ***	−0.64
	Day of year	0.07	0.02 **	0.14	0.43	0.11 ***	−0.67
	Day2	−0.04	0.02	−0.28	−0.26	0.07 ***	0.97
	Day3	0.01	0.01	0.15	0.04	0.01 **	−0.45
	Intercept	2.16	0.04 ***		−1.44	0.06 ***
	Likelihood-ratio
	test	150.32	***		367.43	***
	ICC	.434			.429
	Observations	3476			4840
	N	206			556
		OR	SE	β†	OR	SE	β†
Model 2: Full Sample Binary Outcome	Age group	0.52	0.22 **	0.75	0.52	0.27 *	0.73
	Age	1.01	0.01	1.09	1.06	0.03 *	0.96
	Age2	1.00	0.00	0.87	0.99	0.00	0.84
	Gender	--	--	--	0.95	0.22	0.92
	Day of year	1.02	0.08	1.03	6.17	0.66 **	16.87
	Day2	0.98	0.12	0.92	0.32	0.42 **	0.01
	Day3	1.00	0.03	1.05	1.21	0.08 *	7.26
	Likelihood-ratio
	test	3.10			11.75
	Observations	3476			4840
	N	206			556
		B	SE	β	B	SE	B
Model 3: Clinical Subsample Continuous Outcome	Age	−0.01	0.00 **	−0.09	−0.01	0.01 *	−0.01
	Age2	0.00	0.00	0.02	0.00	0.00 *	−0.05
	Gender	--	--	--	0.32	0.06 ***	−0.49
	Day of year	0.06	0.03 *	0.13	0.58	0.20 **	−0.91
	Day2	−0.02	0.03	−0.14	−0.35	0.13 **	1.29
	Day3	0.00	0.01	0.02	0.06	0.02 *	−0.58
	Intercept	2.42	0.04 ***		−0.91	0.10 ***
	Likelihood-ratio
	test	72.72	***		159.75	***
	Observations	2145			1903
	N	126			212

Note. B = unstandardized beta coefficient; SE = standard error; β = standardized beta coefficient; OR = odds ratio; ICC = Intraclass correlation coefficient.

^†coefficients only standardized for the covariate.

^***p < .001.

^**p < .01.

^*p < .05.